BUS TRANSCEIVERS. SN74HCT623 Datasheet

SN74HCT623 TRANSCEIVERS. Datasheet pdf. Equivalent


Part SN74HCT623
Description OCTAL BUS TRANSCEIVERS
Feature D Operating Voltage Range of 4.5 V to 5.5 V D Low Power Consumption, 80-µA Max ICC D Typical tpd = 1.
Manufacture etcTI
Datasheet
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D Operating Voltage Range of 4.5 V to 5.5 V D Low Power Cons SN74HCT623 Datasheet
Recommendation Recommendation Datasheet SN74HCT623 Datasheet




SN74HCT623
D Operating Voltage Range of 4.5 V to 5.5 V
D Low Power Consumption, 80-µA Max ICC
D Typical tpd = 11 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
SN54HCT623 . . . J OR W PACKAGE
SN74HCT623 . . . DW OR N PACKAGE
(TOP VIEW)
SN54HCT623, SN74HCT623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS016C – MARCH 1984 – REVISED MARCH 2003
D Inputs Are TTL-Voltage Compatible
D Lock Bus-Latch Capability
D True Logic
D High-Current 3-State Outputs Can Drive Up
To 15 LSTTL Loads
SN54HCT623 . . . FK 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
A3
3 2 1 20 19
4
18
B1
A4 5
17 B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
description/ordering information
These octal bus transceivers are designed for asynchronous two-way communication between data buses. The
control-function implementation allows for maximum flexibility in timing.
The ’HCT623 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 disable the device so that the buses are effectively isolated. The dual-enable
configuration gives the transceivers the capability to store data by simultaneously enabling OEAB and OEBA.
Each output reinforces its input in this transceiver configuration. When both OEAB and OEBA are enabled and
all other data sources to the two sets of bus lines are in the high-impedance state, both sets of bus lines (16 total)
remain at their last states. The 8-bit codes appearing on the two sets of buses are identical.
To ensure the high-impedance state during power up or power down, OEBA should be tied to VCC through a
pullup resistor and OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor
is determined by the current-sinking/current-sourcing capability of the driver.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40°C to 85°C
PDIP – N
SOIC – DW
Tube
Tube
SN74HCT623N
SN74HCT623DW
SN74HCT623N
HCT623
CDIP – J
Tube
SNJ54HCT623J
SNJ54HCT623J
–55°C to 125°C CFP – W
Tube
SNJ54HCT623W
SNJ54HCT623W
LCCC – FK
Tube
SNJ54HCT623FK
SNJ54HCT623FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2003, Texas Instruments Incorporated
1



SN74HCT623
SN54HCT623, SN74HCT623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS016C MARCH 1984 REVISED MARCH 2003
FUNCTION TABLE
INPUTS
OEBA OEAB
OPERATION
L
L
B data to A bus
H
H
A data to B bus
H
L
Isolation
L
H
B data to A bus,
A data to B bus
logic diagram (positive logic)
19
OEBA
OEAB 1
A1 2
18
B1
To Seven Other Transceivers
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA
Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under absolute maximum ratingsmay 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 conditionsis 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 51-7.
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265







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