SN74SSTL16837A
20-BIT SSTL_3 INTERFACE UNIVERSAL BUS DRIVER
WITH 3-STATE OUTPUTS
SCBS675G – SEPTEMBER 1996 – REVISED SEPTEMBER 1998
DGG PACKAGE
(TOP VIEW)
Member of the Texas Instruments
Widebus Family
Supports SSTL_3 Signal Inputs and
Outputs
Y1
Y2
GND
Y3
A1
A2
GND
A3
A4
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
2
Flow-Through Architecture Optimizes PCB
Layout
3
4
Meets SSTL_3 Class I and Class II
Specifications
Y4
5
V
V
6
DDQ
Y5
CC
A5
A6
GND
A7
A8
7
Latch-Up Performance Exceeds 250 mA Per
JESD 17
Y6
GND
Y7
8
9
Packaged in Plastic Thin Shrink
Small-Outline Package
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Y8
V
V
description
DDQ
Y9
CC
A9
This 20-bit universal bus driver is designed for 3-V
Y10
GND
OE
A10
GND
CLK
LE
GND
A11
A12
to 3.6-V V
levels.
operation and SSTL_3 or LVTTL I/O
CC
V
REF
GND
Data flow from A to Y is controlled by the
output-enable (OE) input. The device operates in
the transparent mode when latch enable (LE) is
high. The A data is latched if LE is low and clock
(CLK) is held at a high or low logic level. If LE is
low, the A data is stored in the latch/flip-flop on the
low-to-high transition of CLK. When OE is high,
the outputs are in the high-impedance state.
Y11
Y12
V
V
DDQ
Y13
CC
A13
A14
GND
A15
A16
Y14
GND
Y15
To ensure the high-impedance state during power
up or power down, OE should be tied to V
through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
Y16
CC
V
V
DDQ
Y17
CC
A17
A18
GND
A19
A20
Y18
GND
Y19
The SN74SSTL16837A is characterized for
operation from 0°C to 70°C.
Y20
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 Incorporated.
Copyright 1998, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
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