54AC16244, 74AC16244
16-BIT BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCAS120A – MARCH 1990 – REVISED APRIL 1996
54AC16244 . . . WD PACKAGE
74AC16244 . . . DGG OR DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
1OE
1Y1
1Y2
GND
1Y3
1Y4
2OE
1A1
1A2
GND
1A3
1A4
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
Flow-Through Architecture Optimizes PCB
Layout
2
3
4
Distributed V
Minimizes High-Speed Switching Noise
and GND Configuration
CC
5
6
EPIC (Enhanced-Performance Implanted
CMOS) 1- m Process
V
V
7
CC
CC
2A1
2A2
GND
2A3
2A4
3A1
3A2
GND
3A3
3A4
2Y1
2Y2
8
500-mA Typical Latch-Up Immunity at
125°C
9
GND
2Y3
10
11
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages Using 25-mil
Center-to-Center Pin Spacings, and 380-mil
Fine-Pitch Ceramic Flat (WD) Packages
Using 25-mil Center-to-Center Pin Spacings
2Y4 12
3Y1 13
3Y2 14
15
16
17
18
19
20
21
22
23
24
GND
3Y3
3Y4
description
V
V
CC
CC
4A1
4A2
4Y1
4Y2
The ’AC16244 are 16-bit buffers/line drivers
designed specifically to improve both the
performance and density of 3-state memory
address drivers, clock drivers, and bus-oriented
receivers and transmitters. They can be used as
four 4-bit buffers, two 8-bit buffers, or one 16-bit
buffer. These devices provide true outputs and
symmetrical active-low output-enable (OE)
inputs. When OE is low, the device passes
noninverted data from the A inputs to the Y
outputs. When OE is high, the outputs are in the
high-impedance state.
28 GND
27 4A3
26 4A4
25 3OE
GND
4Y3
4Y4
4OE
The 74AC16244 is packaged in the TI’s shrink small-outline package, which provides twice the I/O pin count
and functionality of standard small-outline packages in the same printed-circuit-board area.
The 54AC16244 is characterized for operation over the full military temperature range of –55°C to 125°C. The
74AC16244 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each driver)
INPUTS
OUTPUT
Y
OE
A
H
L
L
L
H
L
H
X
Z
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 1996, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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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