MDS 2304NZ-1 B 1Revision 011205
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
LOW SKEW PCI/PCI-X BUFFER
ICS2304NZ-1
PRELIMINARY INFORMATION
Description
The ICS2304NZ-1 is a high-performance, low skew,
low jitter PCI/PCI-X clock driver. It is designed to
distribute high-speed signals in PCI/PCI-X applications
operating at speeds from 0 to 140 MHz.
The ICS2304NZ-1 is characterized for operation from
-40°C to +85°C for automotive and industrial
applications.
Features
•Packaged in 8-pin TSSOP (4.4 mm body)
•Available in Pb (lead) free package
•Frequency range of 0 to 140 MHz
•Less than 200 ps jitter between outputs
•Distribute one clock input to one bank of four outputs
•Operating voltage of 3.3 V ±10%
•Available in commercial and industrial temperature
ranges
Block Diagram
Logic
Control
OE
CLK_IN
CLK2
CLK1
CLK0
CLK3
LOW SKEW PCI/PCI-X BUFFER
MDS 2304NZ-1 B 2Revision 011205
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
ICS2304NZ-1PRELIMINARY INFORMATION
Pin Assignment Functionality Table
Pin Descriptions
CLK_IN
OE
CLK0
CLK2
GND
VDD
CLK1
CLK31
2
3
4
8
7
6
5
Inputs Outputs
CLK_IN OE CLK(3:0)
0 0 Tristate
01 0
1 0 Tristate
11 1
Pin
Number
Pin
Name
Pin
Type
Pin Description
1 CLK_IN Input Input reference frequency.
2 OE Input Output Enable. When OE is low, it tri-states clock outputs.
3 CLK0 Output Buffered clock output.
4 GND Power Connect to ground.
5 CLK1 Output Buffered clock output.
6 VDD Power Power supply for 3.3 V.
7 CLK2 Output Buffered clock output.
8 CLK3 Output Buffered clock output.
LOW SKEW PCI/PCI-X BUFFER
MDS 2304NZ-1 B 3Revision 011205
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
ICS2304NZ-1PRELIMINARY INFORMATION
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS2304NZ-1. These ratings,
which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of
the device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Notes:
1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current
ratings are observed.
2. This value is limited to 4.6 V maximum.
3. The package thermal impedance is calculated in accordance with JESD 51.
Recommended Operation Conditions
Timing Requirements Over Recommended Ranges of Supply Voltage and Operating
Free-air Temperature
Item Rating
Supply Voltage Range, VDD -0.5 V to 4.3 V
Input Voltage Range, VI (see notes 1 and 2) -0.5 V to VDD + 0.5 V
Output Voltage Range, VO (see notes 1 and 2) -0.5 V to VDD + 0.5 V
Input Clamp Current, IIK (VI<0 or VI>VDD)±50 mA
Output Clamp Current, IIK (VO<0 or VO)±50 mA
Continuous Total Output Current, IO (VO = 0 to VDD)±50 mA
Package Thermal Impedance, θJA (see note 3): PW
Package
230.5°C/W
Storage Temperature Range, Tstg -65°C to 150°C
Parameter Min. Typ. Max. Units
Supply Voltage, VDD 33.33.6V
High-level Input Voltage, VIH 0.7 x VDD V
Low-level Input Voltage, VIL 0.3 x VDD V
Input Voltage, VI0V
DD V
High-level Output Current, IOH -24 mA
Low-level Output Current, IOL 24 mA
Operating Free-air Temperature, TA-40 – +85 °C
Min. Typ. Max. Units
Clock Frequency, fCLK 0 140 MHz
LOW SKEW PCI/PCI-X BUFFER
MDS 2304NZ-1 B 4Revision 011205
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
ICS2304NZ-1PRELIMINARY INFORMATION
Electrical Characteristics at 3.3 V over Recommended Free-air Temperature
Range
VDD = 3.3 V ±10%, TA = -40°C to 70°C (unless stated otherwise)
Note 1: Guaranteed by design, not 100% tested in production.
Parameter Symbol Conditions Min. Typ. Max. Units
Input Voltage VIK VDD at 3.3 V, II = -18 mA -1.2 V
High-level Output Voltage VOH
VDD = min to max,
IOH = -1 mA
VDD-0.2 3.3
V
VDD = 3 V, IOH = -24 mA 2 2.3
VDD = 3 V, IOH = 12 mA 2.4 2.7
Low-level Output Voltage VOL
VDD = min to max,
IOH = 1 mA
0.222 0.2
V
VDD = 3 V, IOH = 24 mA 0.61 0.8
VDD = 3 V, IOH = 12 mA 0.31 0.55
High-level Input Current IOH
VDD = 3 V, VO = 1 V -53 -40 mA
VDD = 3.3 V, VO = 1.65 V -54
Low-level Input Current IOL
VDD = 3 V, VO = 2 V 40 53 mA
VDD = 3.3 V, VO = 1.65 V 57
Input Current IIV = VDD or VO-5 5 mA
Dynamic Supply Current IDD Uploaded outputs at
66.67 MHz
13 37 mA
Input Capacitance
(Note 1)
CIVDD = 3.3 V,
VI = 0V or 3.3 V
3pF
Output Capacitance
(Note 1)
COVDD = 3.3 V,
VI = 0V or 3.3 V
3.2 pF
LOW SKEW PCI/PCI-X BUFFER
MDS 2304NZ-1 B 5Revision 011205
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
ICS2304NZ-1PRELIMINARY INFORMATION
Switching Characteristics at 3.3 V over Recommended Ranges of Supply
Voltage and Operating Free-air Temperature
VDD = 3.3 V ±10%, TA = -40°C to 85°C (unless stated otherwise)
Note 1: Guaranteed by design, not 100% tested in production.
Parameter Measurement Information
Figure 1. Test Load Circuit
Figure 2. Voltage Thresholds for Propagation Delay (tpd) Measurements
Parameter Symbol Conditions Min. Typ. Max. Units
High-to-Low Propagation Delay (Note 1) tPLH VO = VDD/2 1.8 3.1 3.8 ns
Low-to-High Propagation Delay (Note 1) tPHL VO = VDD/2 1.8 2.9 3.8 ns
Output Skew Window (Note 1) TSK(o) VO = VDD/2 50 100 ps
Pulse Skew = | tPLH - tPHL | (Note 1) TSK(p) VO = VDD/2 300 ps
Process Skew (Note 1) TSK(pr) VO = VDD/2 500 ps
CLKIN High Time (Note1) Thigh
66 MHz 6 ns
140 MHz 3 ns
CLKIN Low Time (Note1) Tlow
66 MHz 6 ns
140 MHz 3 ns
Output Rise Slew Rate (Note 1) Tr0.3 to 0.6 VDD 1.5 2.1 4 V/ns
Output Rise Slew Rate (Note 1) Tf0.3 to 0.6 VDD 1.5 2.4 4 V/ns
LOW SKEW PCI/PCI-X BUFFER
MDS 2304NZ-1 B 6Revision 011205
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
ICS2304NZ-1PRELIMINARY INFORMATION
Figure 3. Output Skew
Figure 4. Clock Waveform
Figure 5. Supply Current vs. Frequency
LOW SKEW PCI/PCI-X BUFFER
MDS 2304NZ-1 B 7Revision 011205
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
ICS2304NZ-1PRELIMINARY INFORMATION
Figure 6. High-level Output Voltage vs. High-level Output Current
Figure 7. Low-level Output Voltage vs. Low-level Output Current
LOW SKEW PCI/PCI-X BUFFER
MDS 2304NZ-1 B 8Revision 011205
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
ICS2304NZ-1PRELIMINARY INFORMATION
Package Outline and Package Dimensions (8-pin TSSOP, 4.40 mm Body, 0.65 mm Pitch)
Package dimensions are kept current with JEDEC Publication No. 95, MO-153
Ordering Information
“LF” denotes Pb (lead) free package.
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS)
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
applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary
environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any
circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or
critical medical instruments.
Part / Order Number Marking Shipping Packaging Package Temperature
ICS2304NZG-1 304N1 Tubes 8-pin TSSOP 0 to +70° C
ICS2304NZG-1T 304N1 Tape and Reel 8-pin TSSOP 0 to +70° C
ICS2304NZG-1LF 04N1L Tubes 8-pin TSSOP 0 to +70° C
ICS2304NZG-1LFT 04N1L Tape and Reel 8-pin TSSOP 0 to +70° C
ICS2304NZGI-1 04NI1 Tubes 8-pin TSSOP -40 to +85° C
ICS2304NZGI-1T 04NI1 Tape and Reel 8-pin TSSOP -40 to +85° C
ICS2304NZGI-1LF 4NI1L Tubes 8-pin TSSOP -40 to +85° C
ICS2304NZGI-1LFT 4NI1L Tape and Reel 8-pin TSSOP -40 to +85° C
INDEX
AREA
1 2
8
D
E1 E
SEATING
PLANE
A1
A
A2
e
- C -
b
aaa C
c
L
Millimeters Inches
Symbol Min Max Min Max
A--1.20--0.047
A1 0.05 0.15 0.002 0.006
A2 0.80 1.05 0.032 0.041
b 0.19 0.30 0.007 0.012
C 0.09 0.20 0.0035 0.008
D 2.90 3.10 0.114 0.122
E 6.40 BASIC 0.252 BASIC
E1 4.30 4.50 0.169 0.177
e 0.65 Basic 0.0256 Basic
L 0.45 0.75 0.018 0.030
α0°8°0°8°
aaa -- 0.10 -- 0.004
