ꢀꢁ ꢂꢃ ꢀꢀ ꢄꢅ ꢆꢇ ꢈꢉ ꢂ
ꢆ ꢃ ꢊꢋꢌ ꢄ ꢍꢎ ꢏꢌ ꢀꢄ ꢎꢍꢎꢐ ꢋ ꢑꢒ ꢒꢎ ꢍ
ꢓ ꢌꢄ ꢔ ꢀꢀ ꢄꢕ ꢖ ꢗ ꢌꢁ ꢘꢑꢄ ꢀ ꢙꢁꢐ ꢚ ꢑꢄ ꢘꢑ ꢄꢀ
SCES344E – DECEMBER 2000 – REVISED NOVEMBER 2002
DGG PACKAGE
(TOP VIEW)
D
Member of the Texas Instruments
Widebus Family
D
Supports SSTL_2 Data Inputs
Q1
Q2
GND
D1
D2
GND
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
D
Outputs Meet SSTL_2 Class II
Specifications
D
D
D
Differential Clock (CLK and CLK) Inputs
V
V
DDQ
Q3
CC
D3
D4
D5
D6
D7
Supports LVCMOS Switching Levels on the
RESET Input
Q4
Q5
GND
RESET Input Disables Differential Input
Receivers, Resets All Registers, and
Forces All Outputs Low
V
DDQ
Q6 10
39 CLK
D
D
D
Flow-Through Architecture Optimizes PCB
Layout
Q7
CLK
11
12
38
37
V
V
DDQ
CC
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
GND 13
Q8 14
Q9 15
36 GND
35
V
REF
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
34 RESET
V
16
33 D8
DDQ
GND 17
Q10 18
Q11 19
Q12 20
32 D9
– 1000-V Charged-Device Model (C101)
31 D10
30 D11
29 D12
description
V
21
28
V
DDQ
CC
This 14-bit registered buffer is designed for 2.3-V
to 2.7-V V operation.
GND 22
Q13 23
Q14 24
27 GND
26 D13
25 D14
CC
All inputs are SSTL_2, except the LVCMOS reset
(RESET) input. All outputs are SSTL_2, Class II
compatible.
The SN74SSTV16857 operates from a differential clock (CLK and CLK). Data are registered at the crossing
of CLK going high and CLK going low.
The device supports low-power standby operation. When RESET is low, the differential input receivers are
disabled and undriven (floating) data, clock, and reference voltage (V
) inputs are allowed. In addition, when
REF
RESET is low, all registers are reset and all outputs are forced low. The LVCMOS RESET input always must
be held at a valid logic high or low level.
To ensure defined outputs from the register before a stable clock has been supplied, RESET must be held in
the low state during power up.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
0°C to 70°C
TSSOP – DGG Tape and reel SN74SSTV16857DGGR
SSTV16857
†
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 2002, Texas Instruments Incorporated
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265