Texas Instruments SN54AHCT245, SN74AHCT245 Data Handbook/Specifications
Summary
This datasheet describes the Texas Instruments SN74AHCT245 octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional communication between data buses. The device features TTL-voltage compatible inputs with ESD protection exceeding 2000V human body model, 200V machine model, and 1000V charged device model. Direction of data flow from A bus to B bus or B bus to A bus is controlled by the DIR input, while the output enable (OE) input isolates the buses when asserted. Latch
Page 1 Text Content
查询SN74AHCT245DWE4供应商
SCLS233N − OCTOBER 1995 − REVISED MARCH 2005
Inputs Are TTL-Voltage Compatible ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
Latch-Up Performance Exceeds 250 m A Per
− 200-V Machine Model (A115-A)
JESD 17
− 1000-V Charged-Device Model (C101)
SN54AHCT245 J OR W PACKAGE SN74AHCT245 RGY PACKAGE SN54AHCT245 FK PACKAGE SN74AHCT245 DB, DGV, DW, N, NS, (TOP VIEW) (TOP VIEW)
OR PW PACKAGE (TOP VIEW)
DIR VCC
A1 OE A1 OE
A8 B7 GND B8
description/ordering information These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. The ’AHCT245 devices 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 effectively are isolated. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
ORDERABLE TOP-SIDE
TA PACKAGE† IR
PART NUMBER MARKING
PDIP − N Tube SN74AHCT245N SN74AHCT245N QFN − RGY Tape and reel SN74AHCT245RGYR HB245
Tube SN74AHCT245DW
SOIC − DW AHCT245
Tape and reel SN74AHCT245DWR
−40°C to 85°C SOP − NS Tape and reel SN74AHCT245NSR AHCT245 SSOP − DB Tape and reel SN74AHCT245DBR HB245
Tube SN74AHCT245PW
TSSOP − PW HB245
Tape and reel SN74AHCT245PWR
TVSOP − DGV Tape and reel SN74AHCT245DGVR HB245 CDIP − J Tube SNJ54AHCT245J SNJ54AHCT245J −55°C to 125°C CFP − W Tube SNJ54AHCT245W SNJ54AHCT245W LCCC − FK Tube SNJ54AHCT245FK SNJ54AHCT245FK
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.
Copyright 2005, Texas Instruments Incorporated ! " #$ %! " &$'(# ! ) !%*
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Page Summary Contents For Texas Instruments SN54AHCT245, SN74AHCT245 Data Handbook/Specifications
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 20 |
| File Size | 698.92 KB |
| Published | June 19, 2026 |
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Frequently Asked Questions
What voltage range are these transceivers compatible with?
The supply voltage range, V, is from -0.5 V to 7 V.
How do I ensure proper isolation during power cycling?
To ensure a high-impedance state during power up or power down, the OE input should be tied to V through a pullup resistor.
What determines the direction of data flow between the A and B buses?
Data transmission direction depends on the logic level set at the Direction-Control (DIR) input.
What is the maximum continuous output current (I_OH/I_OL)?
The continuous output current for V or GND is ±25 mA.