841S02CGIT - Integrated Device Technology

DATA SHEET

PCI ExpressTM Clock Generator ICS841S02I

General Description

The ICS841S02I is a PLL-based clock generator specifically

designed for PCI_Express™ Clock Generation applications. This

device generates a 100MHz HCSL clock. The device offers a HCSL

(Host Clock Signal Level) clock output from a clock input reference of

25MHz. The input reference may be derived from an external source

or by the addition of a 25MHz crystal to the on-chip crystal oscillator.

An external reference may be applied to the XTAL_IN pin with the

XTAL_OUT pin left floating.

The device offers spread spectrum clock output for reduced EMI

applications. An I2C bus interface is used to enable or disable spread

spectrum operation as well as select either a down spread value of

-0.35% or -0.5%.

Features

•Two 0.7V current mode differential HCSL output pairs

•Crystal oscillator interface: 25MHz

•Output frequency: 100MHz

•RMS period jitter: 3ps (maximum)

•Output skew: 35ps (maximum)

•Cycle-to-cycle jitter: 35ps (maximum)

•I2C support with readback capabilities up to 400kHz

•Spread Spectrum for electromagnetic interference (EMI) reduction

•3.3V operating supply mode

•-40°C to 85°C ambient operating temperature

•Available in both standard (RoHS 5) and lead-free (RoHS 6)

packages

Divider

Network

PLL

OSC

Logic

SRCT[1:2]

SRCC[1:2]

Pullup

XTAL_IN

XTAL_OUT

S DATA

SCLK

IREF

25MHz 2

ICS841S02I

20-Lead TSSOP

6.5mm x 4.4mm x 0.925mm package body

G Package

Top View

VSS

VDD

VSS

SRCC1

SRCT1

SRCC2

SRCT2

VDD

VSS

IREF

VDD

SDATA

SCLK

XTAL_OUT

XTAL_IN

VDD

VDDA

VSS

Pin Assignment

Block Diagram

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Table 1. Pin Descriptions

NOTE: Pullup refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.

Table 2. Pin Characteristics

Number Name Type Description

1, 7, 9, 11, 13 VSS Power Ground for core and SRC outputs.

2, 8, 14, 20 VDD Power Power supply for core and SRC outputs.

3, 4 SRCT2, SRCC2 Output Differential output pair. HCSL interface levels.

5, 6 SRCT1, SRCC1 Output Differential output pair. HCSL interface levels.

10 IREF Input

An external fixed precision resistor (475Ω) from this pin to ground provides a

reference current used for differential current-mode SRCCx, SRCTx clock

outputs.

12 VDDA Power Analog power supply.

15,

XTAL_IN,

XTAL_OUT Input Crystal oscillator interface. XTAL_IN is the input. XTAL_OUT is the output.

17 nc Unused No connect.

18 SCLK Input Pullup I2C SMBus compatible SCLK. This pin has an internal pullup resistor, but is in

high-impedance in power-down mode. LVCMOS/LVTTL interface levels.

19 SDATA I/O Pullup I2C SMBus compatible SDATA. This pin has an internal pullup resistor, but is

in high-impedance in power-down mode. LVCMOS/LVTTL interface levels.

Symbol Parameter Test Conditions Minimum Typical Maximum Units

CIN Input Capacitance 4pF

RPULLUP Input Pullup Resistor 51 kΩ

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Serial Data Interface

To enhance the flexibility and function of the clock synthesizer, a

two-signal serial interface is provided. Through the Serial Data

Interface, various device functions, such as individual clock output

buffers, can be individually enabled or disabled. The registers

associated with the Serial Data Interface initialize to their default

setting upon power-up, and therefore, use of this interface is optional.

Clock device register changes are normally made upon system

initialization, if any are required. The interface cannot be used during

system operation for power management functions.

Data Protocol

The clock driver serial protocol accepts byte write, byte read, block

write, and block read operations from the controller. For block

write/read operation, the bytes must be accessed in sequential order

from lowest to highest byte (most significant bit first) with the ability to

stop after any complete byte has been transferred. For byte write and

byte read operations, the system controller can access individually

indexed bytes. The offset of the indexed byte is encoded in the

command code, as described in Table 3A.

The block write and block read protocol is outlined in Table 3B, while

Table 3C outlines the corresponding byte write and byte read

protocol. The slave receiver address is 11010010 (D2h).

Table 3A.Command Code Definition

Table 3B. Block Read and Block Write Protocol

Bit Description

7 0 = Block read or block write operation, 1 = Byte read or byte write operation.

6:5 Chip select address, set to “00” to access device.

4:0 Byte offset for byte read or byte write operation. For block read or block write operations, these bits must be “00000”.

Bit Description = Block Write Bit Description = Block Read

1Start 1Start

2:8 Slave address - 7 bits 2:8 Slave address - 7 bits

9Write 9Write

10 Acknowledge from slave 10 Acknowledge from slave

11:18 Command Code - 8 bits 11:18 Command Code - 8 bits

19 Acknowledge from slave 19 Acknowledge from slave

20:27 Byte Count - 8 bits 20 Repeat start

28 Acknowledge from slave 21:27 Slave address - 7 bits

29:36 Data byte 1 - 8 bits 28 Read = 1

37 Acknowledge from slave 29 Acknowledge from slave

38:45 Data byte 2 - 8 bits 30:37 Byte Count from slave - 8 bits

46 Acknowledge from slave 38 Acknowledge

Data Byte/Slave Acknowledges 39:46 Data Byte 1 from slave - 8 bits

Data Byte N - 8 bits 47 Acknowledge

Acknowledge from slave 48:55 Data Byte 2 from slave - 8 bits

Stop 56 Acknowledge

Data Bytes from Slave/Acknowledge

Data Byte N from slave - 8 bits

Not Acknowledge

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Table 3C. Byte Read and Byte Write Protocol

Control Registers

Table 4A. Byte 0: Control Register 0

NOTE: Pup denotes Power-up.

Table 4B. Byte 1: Control Register 1

Table 4C. Byte 2: Control Register 2

Bit Description = Byte Write Bit Description = Byte Read

1 Start 1 Start

2:8 Slave address - 7 bits 2:8 Slave address - 7 bits

9 Write 9 Write

10 Acknowledge from slave 10 Acknowledge from slave

11:18 Command Code - 8 bits 11:18 Command Code - 8 bits

19 Acknowledge from slave 19 Acknowledge from slave

20:27 Data Byte- 8 bits 20 Repeat start

28 Acknowledge from slave 21:27 Slave address - 7 bits

29 Stop 28 Read

29 Acknowledge from slave

30:37 Data from slave - 8 bits

38 Not Acknowledge

39 Stop

Bit @Pup Name Description

7 0 Reserved Reserved

6 1 Reserved Reserved

5 1 Reserved Reserved

4 1 SRC[T/C]2

SRC[T/C]2 Output Enable

0 = Disable (Hi-Z)

1 = Enable

3 1 SRC[T/C]1

SRC[T/C]1 Output Enable

0 = Disable (Hi-Z)

1 = Enable

2 1 Reserved Reserved

1 0 Reserved Reserved

0 0 Reserved Reserved

Bit @Pup Name Description

7 0 Reserved Reserved

6 0 Reserved Reserved

5 0 Reserved Reserved

4 0 Reserved Reserved

3 0 Reserved Reserved

2 0 Reserved Reserved

1 0 Reserved Reserved

0 0 Reserved Reserved

Bit @Pup Name Description

7 1 SRCT/C Spread Spectrum Selection

0 = -0.35%, 1 = - 0.5%

6 1 Reserved Reserved

5 1 Reserved Reserved

4 0 Reserved Reserved

3 1 Reserved Reserved

20SRC

SRC Spread Spectrum Enable

0 = Spread Off,

1 = Spread On

1 1 Reserved Reserved

0 1 Reserved Reserved

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Table 4D. Byte 3:Control Register 3

NOTE: Pup denotes Power-up.

Table 4E. Byte 4: Control Register 4

Table 4F. Byte 5: Control Register 5

Table 4G. Byte 6: Control Register 6

Table 4H. Byte 7: Control Register 7

Bit @Pup Name Description

7 1 Reserved Reserved

6 0 Reserved Reserved

5 1 Reserved Reserved

4 0 Reserved Reserved

3 1 Reserved Reserved

2 1 Reserved Reserved

1 1 Reserved Reserved

0 1 Reserved Reserved

Bit @Pup Name Description

7 0 Reserved Reserved

6 0 Reserved Reserved

5 0 Reserved Reserved

4 0 Reserved Reserved

3 0 Reserved Reserved

2 0 Reserved Reserved

1 0 Reserved Reserved

0 1 Reserved Reserved

Bit @Pup Name Description

7 0 Reserved Reserved

6 0 Reserved Reserved

5 0 Reserved Reserved

4 0 Reserved Reserved

3 0 Reserved Reserved

2 0 Reserved Reserved

1 0 Reserved Reserved

0 0 Reserved Reserved

Bit @Pup Name Description

7 0 TEST_SEL

REF/N or Hi-Z Select

0 = Hi-Z,

1 = REF/N

60TEST_MODE

TEST Clock

Mode Entry Control

0 = Normal Operation,

1 = REF/N or Hi-Z Mode

5 0 Reserved Reserved

4 1 Reserved Reserved

3 0 Reserved Reserved

2 0 Reserved Reserved

1 1 Reserved Reserved

0 1 Reserved Reserved

Bit @Pup Name Description

7 0 Revision Code Bit 3

6 0 Revision Code Bit 2

5 0 Revision Code Bit 1

4 0 Revision Code Bit 0

3 0 Vendor ID Bit 3

2 0 Vendor ID Bit 2

1 0 Vendor ID Bit 1

0 1 Vendor ID Bit 0

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Absolute Maximum Ratings

NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.

These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond

those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for

extended periods may affect product reliability.

DC Electrical Characteristics

Table 5A. Power Supply DC Characteristics, VDD = 3.3V ± 5%, TA = -40°C to 85°C

Table 5B. LVCMOS/LVTTL DC Characteristics, VDD = 3.3V ± 5%, TA = -40°C to 85°C

Item Rating

Supply Voltage, VDD 4.6V

Inputs, VI

XTAL_IN

Other Inputs

0V to VDD

-0.5V to VDD + 0.5V

Outputs, VO-0.5V to VDD + 0.5V

Package Thermal Impedance, θJA 81.3°C/W (0 mps)

Storage Temperature, TSTG -65°C to 150°C

Symbol Parameter Test Conditions Minimum Typical Maximum Units

VDD Core Supply Voltage 3.135 3.3 3.465 V

VDDA Analog Supply Voltage VDD – 0.22 3.3 VDD V

IDD Power Supply Current 80 mA

IDDA Analog Supply Current 22 mA

Symbol Parameter Test Conditions Minimum Typical Maximum Units

VIH Input High Voltage 2.2 V

VIL Input Low Voltage 1.0 V

IIH Input High Current SDATA, SCLK VDD = VIN = 3.465V 10 µA

IIL Input Low Current SDATA, SCLK VDD = 3.465V, VIN = 0V -150 µA

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

AC Electrical Characteristics

Table 6. AC Characteristics, VDD = 3.3V ± 5%, TA = -40°C to 85°C

NOTE: Electrical parameters are guaranteed over the specified ambient operating temperature range, which is established when the device is

mounted in a test socket with maintained transverse airflow greater than 500 lfpm. The device will meet specifications after thermal equilibrium

has been reached under these conditions.

NOTE 1: With recommended crystal.

NOTE 2: Measured at crossing point VOX.

NOTE 3: Measured using a 50Ω to GND termination.

NOTE 4: Measured at crossing point VOX at 100MHz.

NOTE 5: If using the RMS period jitter to calculate peak-to-peak jitter, then use the typical RMS period jitter specification times the RMS

multiplier. For example, for a bit error rate of 10E-12, the peak-to-peak jitter would be 2.42ps x 14 = 33.38ps.

NOTE 6: Measured from VOL = 0.175V to VOH = 0.525V.

NOTE 7: Determined as a fraction of 2*(tR – tF) / (tR + tF).

NOTE 8: The device will operate reliably with input duty cycles up to 30/70% but the REF clock duty cycle will not be within specification.

Symbol Parameter Test Conditions Minimum Typical Maximum Units

fref Crystal Reference Frequency 25 MHz

SCLK SCLK Frequency 400 kHz

Frequency Tolerance;

NOTE 1

XTAL 50 ppm

External

Reference 0 ppm

odc SRCT/SRCC Output Duty Cycle; NOTE 2, 3 47 53 %

tsk(o) SRCT/C to SRCT/C Output Clock Skew;

NOTE 2, 3 35 ps

tPERIOD Average Period; NOTE 4 9.9970 10.0533 ns

tjit(cc) SRCT/C Cycle-to-Cycle Jitter; NOTE 2, 3 35 ps

tjit(per) Period Jitter, RMS; NOTE 2, 3, 5 2.42 3 ps

tR / tFSRCT/SRCC Rise/Fall Time; NOTE 6 150 700 ps

tRFM Rise/Fall Time Matching; NOTE 7 20 %

tDC XTAL_IN Duty Cycle; NOTE 8 47.5 52.5 %

∆tR / tFRise/Fall Time Variation 145 ps

VHIGH Voltage High 520 875 mV

VLOW Voltage Low -150 mV

VOX Output Crossover Voltage @ 0.7V Swing 250 550 mV

VOVS Maximum Overshoot Voltage VHIGH + 0.3 V

VUDS Minimum Undershoot Voltage -0.3 V

VRB Ring Back Voltage 0.2 V

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Parameter Measurement Information

3.3V HCSL Output Load AC Test Circuit

Cycle-to-Cycle Jitter

Output Duty Cycle/Pulse Width/Period

RMS Period Jitter

Output Skew

HCSL Output Rise/Fall Time

475Ω

50Ω

HCSL

GND

SCOPE

IREF

3.3V±5%

VDD

VDDA

SRCT[1:2]

➤

tcycle n tcycle n+1

tjit(cc) =

tcycle n – tcycle n+1

1000 Cycles

SRCC[1:2]

SRCT[1:2]

tPERIOD

PERIOD

odc = x 100%

SRCC[1:2]

HIG

VREF

LOW

Mean Period

(First edge after trigger)

Reference Point

(Trigger Edge)

1σ contains 68.26% of all measurements

2σ contains 95.4% of all measurements

3σ contains 99.73% of all measurements

4σ contains 99.99366% of all measurements

6σ contains (100-1.973x10

-7

)% of all measurements

Histogram

SRCCx

SRCTx

SRCCy

SRCTy

tsk(o)

SRCT[1:2] 20%

80% 80%

20%

SWING

SRCC[1:2]

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Applications Information

Recommendations for Unused Input and Output Pins

Inputs:

LVCMOS Control Pins

All control pins have internal pullups; additional resistance is not

required but can be added for additional protection. A 1kΩ resistor

can be used.

Outputs:

Differential Outputs

All unused differential outputs can be left floating. We recommend

that there is no trace attached. Both sides of the differential output

pair should either be left floating or terminated.

Table 7. Recommended Crystal Specifications

Output Driver Current

The ICS841S02I outputs are HCSL current drive with the current

being set with a resistor from IREF to ground. For a 50Ω pc board trace,

the drive current would typically be set with a RREF of 475Ω which

products an IREF of 2.32mA. The IREF is multiplied by a current mirror

to an output drive of 6*2.32mA or 13.92mA. See Figure 1 for current

mirror and output drive details.

Figure 1. HCSL Current Mirror and Output Drive

Symbol Parameter Value

Crystal Cut Fundamental at Cut

Resonance Parallel Resonance

CLLoad Capacitance 18pF

COShunt Capacitance 5pF - 7pF

ESR Equivalent Series Resistance 20Ω - 50Ω

REF

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Recommended Termination

Figure 2A is the recommended source termination for applications

where the driver and receiver will be on a separate PCBs. This

termination is the standard for PCI Express™ and HCSL output types.

All traces should be 50Ω impedance single-ended or 100Ω

differential.

Figure 2A. Recommended Source Termination (where the driver and receiver will be on separate PCBs)

Figure 2B is the recommended termination for applications where a

point-to-point connection can be used. A point-to-point connection

contains both the driver and the receiver on the same PCB. With a

matched termination at the receiver, transmission-line reflections will

be minimized. In addition, a series resistor (Rs) at the driver offers

flexibility and can help dampen unwanted reflections. The optional

resistor can range from 0Ω to 33Ω. All traces should be 50Ω

impedance single-ended or 100Ω differential.

Figure 2B. Recommended Termination (where a point-to-point connection can be used)

0-0.2"

PCI Express

1-14"

Driver

0.5" Max

49.9 +/- 5%

22 to 33 +/-5%

0.5 - 3.5"

Connector

PCI Express

Add-in Card

PCI Express

0-0.2"

PCI Express

0-0.2"0-18"

Driver

0.5" Max

49.9 +/- 5%

0 to 33

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Schematic Layout

Figure 3 shows an example of ICS841S02I application schematic. In

this example, the device is operated at VDD = 3.3V. The 18pF parallel

resonant 25MHz crystal is used. The load capacitance C1 = 18pF

and C2 = 18pF is recommended for frequency accuracy. Depending

on the parasitic of the printed circuit board layout, these values might

require a slight adjustment for optimize the frequency accuracy. For

this device, the crystal load capacitors are required for proper

operation.

As with any high speed analog circuitry, the power supply pins are

vulnerable to noise. To achieve optimum jitter performance, power

supply isolation is required. The ICS841S02I provides separate

power supplies to isolate noise from coupling into the internal PLL.

In order to achieve the best possible filtering, it is recommended that

the placement of the filter components be on the device side of the

PCB as close to the power pins as possible. If space is limited, the

0.1uF capacitor in each power pin filter should be placed on the

device side of the PCB and the other components can be placed on

the opposite side.

Figure 3. ICS841S02I Application Schematic

Power supply filter recommendations are a general guideline to be

used for reducing external noise from coupling into the devices. The

filter performance is designed for a wide range of noise frequencies.

This low-pass filter starts to attenuate noise at approximately 10kHz.

If a specific frequency noise component is known, such as switching

power supply frequencies, it is recommended that component values

be adjusted and if required, additional filtering be added. Additionally,

good general design practices for power plane voltage stability

suggests adding bulk capacitances in the local area of all devices.

The schematic example focuses on functional connections and is not

configuration specific. Refer to the pin description and functional

tables in the datasheet to ensure the logic control inputs are properly

set.

Recommended for PCI

Express Point-to-Point

Connection

IREF

3.3V

0.1u

1011

VSS

VDD

SRCT2

SRCC2

SRCT1

SRCC1

VSS

VDD

VSS

IREFVSS

VDDA

VSS

VDD

XTAL_IN

XTAL_OUT

SDATA

VDD

SCLK

18pF

VDD

C10

0.1uF

VDD

18pF

SRCC2

VDD

R1 33

(U1-14)

10uF

0.1uF

10uF

SDATA

HCSL Optional

Termination

SRCC1

SRCT2

HCSL Termination

0.1uF

Zo = 50

18pF

(U1-8)

SCLK

(U1-20)

25MHz

SRCC2

VDD

Optional

VDD

R10 0-33

Zo = 50

VDD

R9 0-33

R10

SRCT1

(U1-2)

0.1uF

Zo = 50

BLM18BB221SN1

Ferrite Bead

1 2

Zo = 50

VDD

SRCT2

475

0.1uF

VDD

Recommended for PCI

Express Add-In Card

VDDA

R2 33

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Power Considerations

This section provides information on power dissipation and junction temperature for the ICS841S02I.

Equations and example calculations are also provided.

1. Power Dissipation.

The total power dissipation for the ICS841S02I is the sum of the core power plus the power dissipated in the load(s).

The following is the power dissipation for VDD = 3.3V + 5% = 3.465V, which gives worst case results.

NOTE: Please refer to Section 3 for details on calculating power dissipated in the load.

The maximum current at 85°C is as follows:

IDD_MAX = 75mA

IDDA_MAX = 20mA

• Power (core)MAX = VDD_MAX * (IDD_MAX + IDDA_MAX) = 3.465V *(75mA + 20mA) = 329.175mW

• Power (outputs)MAX = 44.5mW/Loaded Output pair

If all outputs are loaded, the total power is 2 * 44.5mW = 89mW

Total Power_MAX = 329.175mW + 89mW = 418.175mW

2. Junction Temperature.

Junction temperature, Tj, is the temperature at the junction of the bond wire and bond pad directly affects the reliability of the device. The

maximum recommended junction temperature is 125°C. Limiting the internal transistor junction temperature, Tj, to 125°C ensures that the bond

wire and bond pad temperature remains below 125°C.

The equation for Tj is as follows: Tj = θJA * Pd_total + TA

Tj = Junction Temperature

θJA = Junction-to-Ambient Thermal Resistance

Pd_total = Total Device Power Dissipation (example calculation is in section 1 above)

TA = Ambient Temperature

In order to calculate junction temperature, the appropriate junction-to-ambient thermal resistance θJA must be used. Assuming no air flow and

a multi-layer board, the appropriate value is 81.3°C/W per Table 8 below.

Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:

85°C + 0.418W * 81.3°C/W = 119°C. This is below the limit of 125°C.

This calculation is only an example. Tj will obviously vary depending on the number of loaded outputs, supply voltage, air flow and the type of

board (multi-layer).

Table 8. Thermal Resistance θJA for 20 Lead TSSOP, Forced Convection

θJA vs. Air Flow

Meters per Second 012.5

Multi-Layer PCB, JEDEC Standard Test Boards 81.3°C/W 76.9°C/W 74.8°C/W

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

3. Calculations and Equations.

The purpose of this section is to calculate power dissipation on the IC per HCSL output pair.

HCSL output driver circuit and termination are shown in Figure 4.

Figure 4. HCSL Driver Circuit and Termination

HCSL is a current steering output which sources a maximum of 17mA of current per output. To calculate worst case on-chip power dissipation,

use the following equations which assume a 50Ω load to ground.

The highest power dissipation occurs when VDD_MAX.

Power = (VDD_MAX – VOUT) * IOUT

since VOUT – IOUT * RL

= (VDD_MAX – IOUT * RL) * IOUT

= (3.465V – 17mA * 50Ω) * 17mA

Total Power Dissipation per output pair = 44.5mW

OUT

50Ω

➤

OUT = 17mA

REF =

475

Ω

± 1%

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Reliability Information

Table 9. θJA vs. Air Flow Table for a 20 Lead TSSOP

Transistor Count

The transistor count for ICS841S02I is: 1874

Package Outline and Package Dimensions

Package Outline - G Suffix for 20 Lead TSSOP Table 10. Package Dimensions

Reference Document: JEDEC Publication 95, MO-153

θJA vs. Air Flow

Meters per Second 012.5

Multi-Layer PCB, JEDEC Standard Test Boards 81.3°C/W 76.9°C/W 74.8°C/W

All Dimensions in Millimeters

Symbol Minimum Maximum

N20

A1.20

A1 0.05 0.15

A2 0.80 1.05

b0.19 0.30

c0.09 0.20

D6.40 6.60

E6.40 Basic

E1 4.30 4.50

e0.65 Basic

L0.45 0.75

α0° 8°

aaa 0.10

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Ordering Information

Table 11. Ordering Information

NOTE: Parts that are ordered with a "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.

Part/Order Number Marking Package Shipping Packaging Temperature

841S02CGI ICS841S02CGI 20 Lead TSSOP Tube -40°C to 85°C

841S02CGIT ICS841S02CGI 20 Lead TSSOP 2500 Tape & Reel -40°C to 85°C

841S02CGILF ICS841S02CIL “Lead-Free” 20 Lead TSSOP Tube -40°C to 85°C

841S02CGILFT ICS841S02CIL “Lead-Free” 20 Lead TSSOP 2500 Tape & Reel -40°C to 85°C

While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the

infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal

commercial and industrial applications. Any other applications, such as those requiring high reliability or other extraordinary environmental requirements are not recommended without

additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support

devices or critical medical instruments.

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

Revision History Sheet

Rev Table Page Description of Change Date

Updated die revision from ICS841S02BI to ICS841S02CI with updated specifications to

reflect the change (reference PCN #N1101-03).

Updated datasheet format.

1/24/11

ICS841S02I Data Sheet PCI EXPRESSTM CLOCK GENERATOR

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including descriptions of product features and performance, is subject to change without notice. Performance specifications and the operating parameters of the described products are determined in the independent state and are not

guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the

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