This document contains information on a preproduction product. American Microsystems, Inc. reserves the right to change or discontinue this product without notice. 2.28.02
FS6312-71
FS6312-71FS6312-71
FS6312-71
Three-PLL C l ock Generator IC
Three-PLL C l ock Generator ICThree-PLL C l ock Generator IC
Three-PLL C l ock Generator IC
ISO9001
ISO9001ISO9001
ISO9001
1.0 Features
• Three PLLs with deep reference, feedback, and post
dividers to provide precision clock frequencies
• Multiple outputs provide several clocking options
• Outputs may be individually tristated for board testing
by the OE_x pins
• SUSPEND# pin com pletely powers down entir e de-
vice
• Package: 16-pin, 5.3mm (0.209”) SSOP
• Custom frequency patterns, pinouts, and packages
are available. Contact your local AMI Sales Repre-
sentative for more information.
2.0 Description
The FS6312 is a ROM-based CMOS clock generator IC
designed to minimize cost and component count in a va-
riety of electronic systems.
Thr ee low-jitter phase-locked loops (PL Ls ) driv e u p to five
clock outputs to provide a high degree of flexibility. The
device is packaged in a 16-pin SOIC to minimize board
space.
High-resolution divider capability permits generation of
desired frequencies.
Figure 1: Pin Configuration
116
2
3
4
5
6
7
8
15
14
13
12
11
10
9
CLK_C
VDD
VSS
XIN
XOUT
OE_D
CLK_D
OE_B CLK_B
CLK_A
VSS
OE_A
SELECT
VDD
SUSPEND#
OE_C
FS6312-71
Figure 2: Block Diagram
FS6312-71
Crystal
Oscillator
XOUT
XIN
PLL A
PLL B
PLL C
Clock
Logic
CLK_A
CLK_B
CLK_C
CLK_D
SELECT
OE x 4
Device
Control
SUSPEND#
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Three-PLL C l ock Generator IC
Three-PLL C l ock Generator ICThree-PLL C l ock Generator IC
Three-PLL C l ock Generator IC
Table 1: Pin Descriptions
Key: AI = Analog Input; AO = Analog Output; DI = Digital Input; DIU = Input with Internal Pull-Up; DID = Input with Internal Pull-Down; DIO = Digital Input/Output; DI-3 = Three-Level Digital Input,
DO = Digital Output; P = Power/Ground; # = Active Low pin
PIN TYPE NAME DESCRIPTION
1 DO CLK_C C clock output
2 P VDD Power supply (3.3V )
3 P VSS Ground
4 AI XIN Crystal oscillator feedback
5 AO XOUT Crystal oscillator drive
6 DI OE_D CLK_D output enable
7 DO CLK_D D clock output
8 DI OE_B CLK_B output enable
9 DO CLK_B A clock output
10 DO CLK_A B clock output
11 P VSS Ground
12 DI OE_A CLK_A output enable
13 DI SELECT Frequency sel ect c ontrol i nput (see Table)
14 P VDD Power supply (3.3V)
15 DI SUSPEND# Device SUSPEND (power-down) c ontrol; when low (logic 0) device is shut-down
16 DI OE_C CLK_C output enable
Table 2: Frequency Table – FS6312-71 (3.3volt)
SELECT FREF (MHz) CLK_A (MHz)
(pin 10) CLK_B (MHz)
(pin 9) CLK_C (MHz)
(pin 1) CLK_D (MHz)
(pin 7)
0 14.31818 36.000 6.000 11.000 14.31818
1 14.31818 36.000 6.000 11.000 17.734475
(FREF * 706 / 570)
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Three-PLL C l ock Generator IC
Three-PLL C l ock Generator ICThree-PLL C l ock Generator IC
Three-PLL C l ock Generator IC
3.0 Electrical Specifications
Table 3: Absolute Maximum Ratings
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These conditions represent a stress rating only, and functional operation of the device at
these or any other conditions above the operational limits noted in this specification is not implied. Exposure to maximum rating conditions for extended conditions may affect device performance,
functionality, and reliability.
PARAMETER SYMBOL MIN. MAX. UNITS
Supply Voltage, dc (VSS = ground) VDD VSS-0.5 7 V
Input Voltage, dc VIVSS-0.5 VDD+0.5 V
Output Voltage, dc VOVSS-0.5 VDD+0.5 V
Input Clamp Current, dc (V I < 0 or VI > VDD)I
IK -50 50 mA
Output Clamp Current, dc (VI < 0 or VI > VDD)I
OK -50 50 mA
Storage Temperature Range (non-condensing) TS-65 150 °C
Ambient Temperature Range, Under Bias TA-55 125 °C
Junction Temperature TJ150 °C
Lead Temperature (soldering, 10s) 260 °C
Input Static Disc harge Voltage Protection (MIL-STD 883E, Method 3015.7) 2 kV
CAUTION: ELECTROSTATIC SENSITIVE DEVICE
Permanent damage res ulting in a loss of functi onality or performance may occur if this devic e is subjected to a high-energy elec-
trostatic discharge.
Table 4: Operating Conditions
PARAMETER SYMBOL CONDITIONS/DESCRIPTION MIN. TYP. MAX. UNITS
Supply Voltage VDD 3.3V ± 10% 3 3.3 3.6 V
Ambient Operating Temperature Range TA070°C
Output Load Capacit ance CL25 pF
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Three-PLL C l ock Generator IC
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Three-PLL C l ock Generator IC
Table 5: DC Electrical Specifications
Unless otherwise stated, VDD = 3.3V, no load on any output, and ambient temperature range TA = 0°C to 70°C. Parameters denoted with an asterisk ( * ) represent nominal characterization data and
are not production tested to any specific limits. Where given, MIN and MAX characterization data are ± 3σ from typical. Negative currents indicate current flows out of the device.
PARAMETER SYMBOL CONDITIONS/DESCRIPTION MIN. TYP. MAX. UNITS
Overall
Supply Current, Dynamic, with Loaded
Outputs IDD 25 mA
Crystal Oscillator
Crystal Loadi ng Capaci tance CL(xtal) As seen by a crystal connecte d to XIN and
XOUT 16 pF
Clock Outputs (CLK_x)
High-Level Output Source Current * IOH VO = VDD – 0.8V -21 mA
Low-Level Output Sink Current * IOL VO = 0.4V +10 mA
Short-Circ uit Output Sourc e Current * IOH VO = 0V -30 mA
Short-Circ uit Output Sink Current * IOL VO = VDD +25 mA
Table 6: AC Timing Specifications
Unless otherwise stated, VDD = 3.3V, no load on any output, and ambient temperature range TA = 0°C to 70°C. Parameters denoted with an asterisk ( * ) represent nominal characterization data and
are not production tested to any specific limits. Where given, MIN and MAX characterization data are ± 3σ from typical.
PARAMETER SYMBOL CONDITIONS/DESCRIPTION MIN. TYP. MAX. UNITS
Clock Outputs (CLK_x)
Duty Cycle * Ratio of high pulse width (as measured f rom rising
edge to next falling edge at VDD/2) to one clock period 45 55 %
Jitter, Period (1 sigma) * tj(∆P) From rising edge to next risi ng edge at VDD/2 80 ps
Rise Time * trVDDO = 3 .3V ; VO = 0.4V to 2.4V; CL = 10pF 1.0 ns
Fall Time * tfVDDO = 3. 3V; VO = 2.4V to 0.4V; CL = 10pF 1.0 ns
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Three-PLL C l ock Generator IC
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Three-PLL C l ock Generator IC
4.0 Package Information
Table 7: 16-pin 5.3mm (0.209") SSOP Package Dimensions
DIMENSIONS
INCHES MILLIMETERS
MIN. MAX. MIN. MAX.
A 0.068 0.078 1.73 1.99
A1 0.002 0.008 0.05 0.21
A2 0.066 0.070 1.68 1.78
B 0.010 0.015 0.25 0.38
C 0.005 0.008 0.13 0.20
D 0.239 0.249 6.07 6.33
E 0.205 0.212 5.20 5.38
e 0.0256 BSC 0.65 BSC
H 0.301 0.311 7.65 7.90
L 0.022 0.037 0.55 0.95
Θ0808
Be
DA
1
SEATING PLANE
HE
16
1
BASE PLANE
A
2
C
L
θ
A
AMERICAN MICROSYSTEMS, INC.
R
62.28.02
FS6312-71
FS6312-71FS6312-71
FS6312-71
Three-PLL C l ock Generator IC
Three-PLL C l ock Generator ICThree-PLL C l ock Generator IC
Three-PLL C l ock Generator IC
5.0 Ordering Information
ORDERING CODE DEVICE NUM BER PACKAGE TYPE OPERATING
TEM PERATURE RANGE SHIPPING
CONFIGURATION
11825-806 FS6312-71 16-Pin 5. 3mm (0.209”)
SSOP 0°C to 70°C (Commercial) Tape and Reel
11825-816 FS6312-71 16-Pin 5. 3mm (0.209”)
SSOP 0°C to 70°C (Commercial) Tubes
Copyright © 2000 American Microsystems, Inc.
Devices sold by AMI are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. AMI
makes no warranty, express, statutory implied or by description, regarding the information set forth herein or regarding the freedom
of the described devices from patent infringement. AMI makes no warranty of merchantability or fitness for any purposes. AMI re-
serves the right to discontinue production and change specifications and prices at any time and without notice. AMI’s products are
intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental require-
ments, or high reliability applications, such as military, medical life-support or life-sustaining equipment, are specifically not recom-
mended without additional processing by AMI for such applications.
American Microsystems, Inc., 2300 Buckskin Rd., Pocatello, ID 83201, (208) 233-4690, FAX (208) 234-6796,
WWW Add ress: http://www.amis.com E-mail: tgp@amis.com
