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SN54HC640J

Part # SN54HC640J
Description Bus XCVR Single 8-CH 3-ST 20-Pin CDIP Tube - Rail/Tube
Category IC
Availability In Stock
Qty 1
Qty Price
1 + $4.08183
Manufacturer Available Qty
Texas Instruments
Date Code: 9838
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

SN54HC640, SN74HC640
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS303A – JANUARY 1996 – REVISED MAY 1997
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Inverting Logic
High-Current 3-State Outputs Can Drive up
to 15 LSTTL Loads
Package Options Include Plastic
Small-Outline (DW) and Ceramic Flat (W)
Packages, Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
300-mil DIPs
description
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. These devices transmit data from the
A bus to the B bus or from the B bus to the A bus,
depending upon the level at the direction-control
(DIR) input. The output-enable (OE
) input can be
used to disable the device so the buses are
effectively isolated.
The SN54HC640 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74HC640 is characterized for
operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
OPERATION
OE DIR
OPERATION
L L B data to A bus
L HA data to B bus
H X Isolation
Copyright 1997, Texas Instruments Incorporated
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.
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.
SN54HC640 ...J OR W PACKAGE
SN74HC640 . . . DW OR N PACKAGE
(TOP VIEW)
SN54HC640 . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
3212019
9
10 11 12 13
4
5
6
7
8
18
17
16
15
14
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
A2
A1
DIR
B7
B6
OE
A8
GND
B8
V
CC
SN54HC640, SN74HC640
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS303A – JANUARY 1996 – REVISED MAY 1997
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol
†
B2
17
B3
16
B4
15
A5
6
A6
7
A7
8
A8
9
A2
3
A3
4
A4
5
OE
A1
2
G3
19
3 EN2 [AB]
B5
14
B6
13
B7
12
B8
11
B1
18
3 EN1 [BA]
1
DIR
1
2
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
A1
B1
OE
DIR
To Seven Other Transceivers
19
1
218
SN54HC640, SN74HC640
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS303A – JANUARY 1996 – REVISED MAY 1997
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range
†
Supply voltage range, V
CC
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(V
O
= 0 to V
CC
) ±35 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND ±70 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Note 2): DW package 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
recommended operating conditions
SN54HC640 SN74HC640
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 2 5 6 2 5 6 V
V
CC
= 2 V 1.5 1.5
V
IH
High-level input voltage
V
CC
= 4.5 V
3.15 3.15
V
V
CC
= 6 V 4.2 4.2
V
CC
= 2 V 0 0.5 0 0.5
V
IL
Low-level input voltage
V
CC
= 4.5 V
0 1.35 0 1.35
V
V
CC
= 6 V 0 1.8 0 1.8
V
I
Input voltage 0 V
CC
0 V
CC
V
V
O
Output voltage 0 V
CC
0 V
CC
V
V
CC
= 2 V 0 1000 0 1000
t
t
Input transition (rise and fall) time
V
CC
= 4.5 V
0 500 0 500
ns
V
CC
= 6 V 0 400 0 400
T
A
Operating free-air temperature –55 125 –40 85 °C
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