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ꢗ ꢎꢄ ꢘ ꢀꢀ ꢄꢙ ꢚ ꢐ ꢎꢁ ꢛꢕꢄ ꢀ ꢜꢁꢔ ꢏ ꢕꢄ ꢛꢕ ꢄꢀ
SCES297D − FEBRUARY 2000 − REVISED AUGUST 2004
DGG PACKAGE
(TOP VIEW)
D
D
Member of the Texas Instruments
Widebus Family
1-to-2 Outputs to Support Stacked DDR
DIMMs
1
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
Q13A
Q12A
Q11A
Q10A
Q9A
V
DDQ
2
GND
D13
D12
D
Supports SSTL_2 Data Inputs
3
D
Outputs Meet SSTL_2 Class II
Specifications
4
5
V
V
CC
6
V
D
D
D
Differential Clock (CLK and CLK) Inputs
DDQ
DDQ
7
GND
Q8A
Q7A
Q6A
Q5A
Q4A
Q3A
Q2A
GND
Q1A
Q13B
GND
D11
D10
D9
GND
D8
Supports LVCMOS Switching Levels on the
RESET Input
8
9
RESET Input Disables Differential Input
Receivers, Resets All Registers, and
Forces All Outputs Low
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
D
D
D
Pinout Optimizes DIMM PCB Layout
D7
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
RESET
GND
CLK
CLK
V
V
V
D6
GND
D5
D4
D3
GND
V
V
D2
D1
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
V
DDQ
DDQ
Q12B
Q11B
Q10B
Q9B
Q8B
Q7B
CC
description/ordering information
REF
This 13-bit to 26-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 SSTL_2, Class II
compatible.
Q6B
GND
V
DDQ
Q5B
DDQ
CC
The SN74SSTV16859 operates from a differential
clock (CLK and CLK). Data are registered at the
crossing of CLK going high and CLK going low.
Q4B
Q3B
Q2B
Q1B
GND
V
DDQ
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
T
PACKAGE
QFN − RGQ
A
SN74SSTV16859RGQR
SN74SSTV16859RGQ8
(Tin−Pb Finish)
Tape and reel
SS859
0°C to 70°C
QFN − RGQ
(Matte−Tin Finish)
TSSOP − DGG
Tape and reel SN74SSTV16859DGGR
SSTV16859
†
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.
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Copyright 2004, Texas Instruments Incorporated
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1
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