SN54AHCT16245 Datasheet, PDF (1/6 Pages) Texas Instruments – 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN54AHCT16245, SN74AHCT16245
16-BIT BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS335I – MARCH 1996 – REVISED JANUARY 2000
D Members of the Texas Instruments
Widebus ™ Family
D EPIC ™ (Enhanced-Performance Implanted
CMOS) Process
D Inputs Are TTL-Voltage Compatible
D Distributed V_CC and GND Pins Minimize
High-Speed Switching Noise
D Flow-Through Architecture Optimizes PCB
Layout
D Latch-Up Performance Exceeds 250 mA Per
JESD 17
D Package Options Include Plastic Shrink
Small-Outline (DL), Thin Shrink
Small-Outline (DGG), and Thin Very
Small-Outline (DGV) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
description
The ’AHCT16245 devices are 16-bit (dual-octal)
noninverting 3-state transceivers designed for
synchronous two-way communication between
data buses. The control-function implementation
minimizes external timing requirements.
These devices can be used as two 8-bit
transceivers or one 16-bit transceiver. They allow
data transmission from the A bus to the B bus or
from the B bus to the A bus, depending on the logic
level at the direction-control (DIR) input. The
output-enable (OE) input can be used to disable
the device so that the buses are effectively
isolated.
SN54AHCT16245 . . . WD PACKAGE
SN74AHCT16245 . . . DGG, DGV, OR DL PACKAGE
(TOP VIEW)
1DIR 1
1B1 2
1B2 3
GND 4
1B3 5
1B4 6
V_CC 7
1B5 8
1B6 9
GND 10
1B7 11
1B8 12
2B1 13
2B2 14
GND 15
2B3 16
2B4 17
V_CC 18
2B5 19
2B6 20
GND 21
2B7 22
2B8 23
2DIR 24
48 1OE
47 1A1
46 1A2
45 GND
44 1A3
43 1A4
42 V_CC
41 1A5
40 1A6
39 GND
38 1A7
37 1A8
36 2A1
35 2A2
34 GND
33 2A3
32 2A4
31 V_CC
30 2A5
29 2A6
28 GND
27 2A7
26 2A8
25 2OE
To ensure the high-impedance state during power up or power down, OE should be tied to V_CC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN54AHCT16245 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74AHCT16245 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each 8-bit transceiver)
INPUTS
OE DIR
OPERATION
L
L
B data to A bus
L
H A data to B bus
H
X
Isolation
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.
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.
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Copyright © 2000, Texas Instruments Incorporated
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