SN74ALVCH162260
12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCAS570H – MARCH 1996 – REVISED JUNE 1999
DGG OR DL PACKAGE
(TOP VIEW)
Member of the Texas Instruments
Widebus Family
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
OEA
LE1B
2B3
GND
2B2
OE2B
LEA2B
2B4
GND
2B5
1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
2
B-Port Outputs Have Equivalent 26-Ω
Series Resistors, So No External Resistors
Are Required
3
4
5
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
2B1
2B6
6
V
V
7
CC
CC
A1
A2
A3
GND
A4
A5
A6
A7
A8
2B7
2B8
2B9
8
9
Latch-Up Performance Exceeds 250 mA Per
JESD 17
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
GND
2B10
2B11
2B12
1B12
1B11
1B10
GND
1B9
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
Package Options Include Thin-Shrink
Small-Outline (DGG) and Plastic Shrink
Small-Outline (DL) Packages
NOTE: For tape and reel order entry:
A9
GND
A10
A11
A12
The DGGR package is abbreviated to GR.
description
1B8
1B7
This 12-bit to 24-bit multiplexed D-type latch is
V
V
CC
CC
designed for 1.65-V to 3.6-V
operation.
CC
1B1
1B2
GND
1B3
LE2B
SEL
1B6
1B5
GND
1B4
LEA1B
OE1B
The SN74ALVCH162260 is used in applications
in which two separate data paths must be
multiplexed onto, or demultiplexed from, a single
data path. Typical applications include
multiplexing and/or demultiplexing address and
data
information
in
microprocessor
or
bus-interface applications. This device also is
useful in memory-interleaving applications.
Three 12-bit I/O ports (A1–A12, 1B1–1B12, and 2B1–2B12) are available for address and/or data transfer. The
output-enable (OE1B, OE2B, and OEA) inputs control the bus transceiver functions. The OE1B and OE2B
control signals also allow bank control in the A-to-B direction.
Address and/or data information can be stored using the internal storage latches. The latch-enable (LE1B,
LE2B, LEA1B, and LEA2B) inputs are used to control data storage. When the latch-enable input is high, the
latch is transparent. When the latch-enable input goes low, the data present at the inputs is latched and remains
latched until the latch-enable input is returned high.
The B outputs, which are designed to sink up to 12 mA, include equivalent 26-Ω resistors to reduce overshoot
and undershoot.
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
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.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
Copyright 1999, 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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