SN74HSTL16918_08 Datasheet, PDF (1/9 Pages) Texas Instruments – 9-BIT TO 18-BIT HSTL-TO-LVTTL MEMORY ADDRESS LATCH

SN74HSTL16918
9-BIT TO 18-BIT HSTL-TO-LVTTL MEMORY ADDRESS LATCH
D Member of the Texas Instruments
Widebus™ Family
D Inputs Meet JEDEC HSTL Std JESD 8-6 and
Outputs Meet Level III Specifications
D ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D Latch-Up Performance Exceeds 250 mA Per
JESD 17
D Packaged in Plastic Thin Shrink
Small-Outline Package
description
This 9-bit to 18-bit D-type latch is designed for
3.15-V to 3.45-V V_CC operation. The D inputs
accept HSTL levels and the Q outputs provide
LVTTL levels.
The SN74HSTL16918 is particularly suitable for
driving an address bus to two banks of memory.
Each bank of nine outputs is controlled with its
own latch-enable (LE) input.
Each of the nine D inputs is tied to the inputs of two
D-type latches that provide true data (Q) at the
outputs. While LE is low, the Q outputs of the
corresponding nine latches follow the D inputs.
When LE is taken high, the Q outputs are latched
at the levels set up at the D inputs.
The SN74HSTL16918 is characterized for
operation from 0°C to 70°C.
SCES096C – APRIL 1997 – REVISED JANUARY 1999
DGG PACKAGE
(TOP VIEW)
2Q1 1
1Q1 2
GND 3
D1 4
D2 5
V_CC 6
D3 7
D4 8
GND 9
1LE 10
GND 11
V_REF 12
GND 13
2LE 14
GND 15
D5 16
D6 17
D7 18
V_CC 19
D8 20
D9 21
GND 22
2Q9 23
1Q9 24
48 V_CC
47 V_CC
46 1Q2
45 2Q2
44 GND
43 1Q3
42 2Q3
41 V_CC
40 1Q4
39 2Q4
38 GND
37 1Q5
36 2Q5
35 GND
34 1Q6
33 2Q6
32 V_CC
31 1Q7
30 2Q7
29 GND
28 1Q8
27 2Q8
26 V_CC
25 V_CC
FUNCTION TABLE
INPUTS
LE
D
OUTPUT
Q
L
H
H
L
L
L
H
X
Q0†
† _{Output level before the}
indicated steady-state input
conditions were established
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.
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.
Copyright © 1999, Texas Instruments Incorporated
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