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ꢇ ꢃ ꢋꢌꢍ ꢄ ꢎꢏꢐ ꢍ ꢀꢄ ꢏꢎꢏꢑ ꢌ ꢒꢆ ꢆꢏ ꢎ
ꢓ ꢍꢄ ꢔ ꢀꢀ ꢄꢕ ꢖ ꢗ ꢍꢁ ꢘꢒꢄ ꢀ ꢙꢁꢑ ꢚ ꢒꢄ ꢘ ꢒꢄꢀ
SCES411B – AUGUST 2002 – REVISED APRIL 2003
DGG PACKAGE
(TOP VIEW)
D
D
Member of the Texas Instruments
Widebus Family
Operates at 2.3 V to 2.7 V for PC1600,
PC2100, and PC2700; 2.5 V to 2.7 V for
PC3200
Q1
Q2
GND
D1
D2
GND
V
D3
D4
D5
D6
D7
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
D
D
Pinout and Functionality Compatible With
JEDEC Standard SSTV16857
V
DDQ
Q3
CC
600 ps Faster (Simultaneous Switching)
Than JEDEC Standard SSTV16857 in
PC2700 DIMM Applications
Q4
Q5
GND
V
D
D
D
D
D
Output Edge-Control Circuitry Minimizes
Switching Noise in Unterminated DIMM
Load
DDQ
Q6 10
39 CLK
Q7
CLK
V
11
12
38
37
V
DDQ
CC
Outputs Meet SSTL_2 Class I
Specifications
GND 13
Q8 14
Q9 15
36 GND
35
V
REF
Supports SSTL_2 Data Inputs
34 RESET
Differential Clock (CLK and CLK) Inputs
V
16
33 D8
DDQ
Supports LVCMOS Switching Levels on the
RESET Input
GND 17
Q10 18
Q11 19
Q12 20
32 D9
31 D10
30 D11
29 D12
D
RESET Input Disables Differential Input
Receivers, Resets All Registers, and
Forces All Outputs Low
V
21
28
V
DDQ
CC
GND 22
Q13 23
Q14 24
27 GND
26 D13
25 D14
D
D
D
Flow-Through Architecture Optimizes PCB
Layout
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
description/ordering information
This 14-bit registered buffer is designed for 2.3-V to 2.7-V V
operation.
CC
All inputs are SSTL_2, except the LVCMOS reset (RESET) input. All outputs are edge-controlled circuits
optimized for unterminated DIMM loads and meet SSTL_2 Class I specifications.
The SN74SSTVF16857 operates from a differential clock (CLK and CLK). Data are registered at the crossing
of CLK going high and CLK going low.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
0°C to 70°C
TSSOP – DGG Tape and reel SN74SSTVF16857GR
SSTVF16857
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus is a trademark of Texas Instruments.
Copyright 2003, Texas Instruments Incorporated
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265