SN54ABT16600, SN74ABT16600
18-BIT UNIVERSAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS209B – JUNE 1992 – REVISED JANUARY 1997
SN54ABT16600 . . . WD PACKAGE
SN74ABT16600 . . . DGG OR DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
State-of-the-Art EPIC-ΙΙB BiCMOS Design
Significantly Reduces Power Dissipation
OEAB
LEAB
A1
GND
A2
1
56 CLKENAB
55 CLKAB
54 B1
UBT (Universal Bus Transceiver)
2
Combines D-Type Latches and D-Type
Flip-Flops for Operation in Transparent,
Latched, Clocked, or Clock-Enabled Mode
3
4
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
GND
B2
B3
5
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015
6
A3
7
V
V
CC
A4
CC
8
B4
B5
B6
GND
B7
Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
9
A5
A6
GND
A7
A8
A9
A10
A11
A12
GND
A13
A14
A15
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Typical V
< 0.8 V at V
(Output Ground Bounce)
OLP
= 5 V, T = 25°C
CC
A
Flow-Through Architecture Optimizes PCB
Layout
B8
B9
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
B10
B11
B12
GND
B13
B14
B15
description
V
V
CC
CC
These 18-bit universal bus transceivers combine
D-type latches and D-type flip-flops to allow data
flow in transparent, latched, clocked, and
clock-enabled modes.
A16
A17
GND
A18
OEBA
LEBA
B16
B17
GND
B18
CLKBA
CLKENBA
Data flow in each direction is controlled by
output-enable (OEAB and OEBA), latch-enable
(LEAB and LEBA), and clock (CLKAB and
CLKBA) inputs. The clock can be controlled by the
clock-enable (CLKENAB and CLKENBA) inputs.
For A-to-B data flow, the device operates in the
transparent mode when LEAB is high. When
LEAB is low, the A data is latched if CLKAB is held
at a high or low logic level. If LEAB is low, the
A-bus data is stored in the latch/flip-flop on the
high-to-low transition of CLKAB. Output enable
OEAB is active low. When OEAB is low, the
outputs are active. When OEAB is high, the
outputs are in the high-impedance state.
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, EPIC-ΙΙB, and UBT are trademarks of Texas Instruments Incorporated.
Copyright 1997, 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
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265