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SN54BCT620A Datasheet Preview

SN54BCT620A Datasheet

Octal Bus Transceivers

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State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
P-N-P Inputs Reduce DC Loading
ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
description
The BCT620A bus transceiver is designed for
asynchronous communication between data
buses. The control function implementation allows
for maximum flexibility in timing. The BCT620A
provides inverted data at its outputs.
These devices allow data transmission from the A
bus to the B bus or from the B bus to the A bus
depending upon the logic levels at the
output-enable (OEAB and OEBA) inputs.
The output-enable inputs can be used to disable
the device so that the buses are effectively
isolated. The dual-enable configuration gives the
transceivers the capability of storing data by
simultaneously enabling OEAB and OEBA. When
both OEAB and OEBA are enabled and all other
data sources to the two sets of bus lines are at high
impedance, both sets of bus lines (16 in all) will
remain at their last states. In this way, each output
reinforces its input in this configuration.
The SN54BCT620A is characterized for operation
over the full military temperature range of − 55°C
to 125°C. The SN74BCT620A is characterized for
operation from 0°C to 70°C.
SN54BCT620A, SN74BCT620A
OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCBS001B − SEPTEMBER 1987 − REVISED NOVEMBER 1993
SN54BCT620A . . . J OR W PACKAGE
SN74BCT620A . . . DW OR N PACKAGE
(TOP VIEW)
OEAB 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 VCC
19 OEBA
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
SN54BCT620A . . . FK PACKAGE
(TOP VIEW)
3 2 1 20 19
A3 4
18 B1
A4 5
17 B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
FUNCTION TABLE
INPUTS
OEBA OEAB
OPERATION
L
L
B data to A bus
B data to A bus,
L
H
A data to B bus
H
L
Isolation
H
H
A data to B bus
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 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
2−1




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SN54BCT620A Datasheet Preview

SN54BCT620A Datasheet

Octal Bus Transceivers

No Preview Available !

SN54BCT620A, SN74BCT620A
OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCBS001B − SEPTEMBER 1987 − REVISED NOVEMBER 1993
logic symbol
logic diagram (positive logic)
19
OEBA
1
OEAB
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
EN1
EN2
11
12
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
B8
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
19
OEBA
1
OEAB
A1 2
18 B1
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.5 V to 7 V
Input voltage range: Control inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.5 V to 7 V
I/O ports (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.5 V to 5.5 V
Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . − 0.5 V to 5.5 V
Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.5 V to VCC
Input clamp current, IIK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30 mA
Current into any output in the low state: SN54BCT620A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74BCT620A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54BCT620A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 55°C to 125°C
SN74BCT620A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 65°C to 150°C
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
recommended operating conditions
VCC
VIH
VIL
IIK
IOH
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
IOL
Low-level output current
TA
Operating free-air temperature
A port
B port
A port
B port
SN54BCT620A
MIN NOM MAX
4.5
5 5.5
2
0.8
−18
−3
−12
20
48
− 55
125
SN74BCT620A
MIN NOM MAX
4.5
5 5.5
2
0.8
−18
−3
−15
24
64
0
70
UNIT
V
V
V
mA
mA
mA
°C
2−2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443


Part Number SN54BCT620A
Description Octal Bus Transceivers
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