SN54ABTE16245 Datasheet, PDF (1/10 Pages) Texas Instruments – 16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN54ABTE16245, SN74ABTE16245
16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS226J – JULY 1993 – REVISED DECEMBER 2001
D Members of the Texas Instruments
Widebus Family
D Support the VME64 ETL Specification
SN54ABTE16245 . . . WD PACKAGE
SN74ABTE16245 . . . DGG OR DL PACKAGE
(TOP VIEW)
D Reduced, TTL-Compatible, Input Threshold
Range
D High-Drive Outputs (I_OH = –60 mA,
I_OL = 90 mA) Support 25-Ω Incident-Wave
Switching
1DIR 1
1B1 2
2B1 3
GND 4
1B2 5
48 V_CCBIAS
47 1A1
46 2A1
45 GND
44 1A2
D V_CCBIAS Pin Minimizes Signal Distortion
During Live Insertion
D Internal Pullup Resistor on OE Keeps
Outputs in High-Impedance State During
Power Up or Power Down
D Distributed V_CC and GND Pins Minimize
High-Speed Switching Noise
D Equivalent 25-Ω Series Damping Resistor
on B Port
D Bus Hold on Data Inputs Eliminates the
2B2 6
V_CC 7
1B3 8
2B3 9
GND 10
1B4 11
2B4 12
1B5 13
2B5 14
GND 15
1B6 16
43 2A2
42 V_CC
41 1A3
40 2A3
39 GND
38 1A4
37 2A4
36 1A5
35 2A5
34 GND
33 1A6
Need for External Pullup/Pulldown
2B6 17 32 2A6
Resistors
description
V_CC 18
1B7 19
2B7 20
31 V_CC
30 1A7
29 2A7
The ’ABTE16245 devices are 16-bit (dual-octal)
noninverting 3-state transceivers designed for
synchronous two-way communication between
data buses. The control-function implementation
GND 21
1B8 22
2B8 23
2DIR 24
28 GND
27 1A8
26 2A8
25 OE
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. When OE is low, the device is active.
The B port has an equivalent 25-Ω series output resistor to reduce ringing. Active bus-hold inputs also are on
the B port to hold unused or floating inputs at a valid logic level.
The A port provides for the precharging of the outputs via V_CCBIAS, which establishes a voltage between 1.3 V
and 1.7 V when V_CC is not connected.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
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.
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  2001, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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