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Texas Instruments SN74AHCT245N — Memory (DRAM / SRAM / Flash / EEPROM)

SN74AHCT245N 74AHCT Octal Bus Transceiver, 3-State, 20-DIP

MPNSN74AHCT245N
End of Life

Texas Instruments SN74AHCT245N, Series 74AHCT, Logic Type Transceiver Non-Inverting, Output Type 3-State, 8-Bit, 1 Element, 4.5V-5.5V Supply, 8mA Output Current, Through Hole 20-DIP, -40°C to 125°C.

$0.8Ref. price · indicative, final on quote
Texas Instruments SN74AHCT245N datasheet (PDF)
Packaging20-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Series74AHCT
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74AHCT245N specifications
ParameterValue
Series74AHCT
Logic typeTransceiver, Non-Inverting
Output type3-State
MountingThrough Hole
Supply voltage4.5V ~ 5.5V
Current - output high, low8mA, 8mA
Operating temperature-40°C ~ 125°C (TA)
PackageTube
Case20-DIP (0.300\", 7.62mm)
Number of elements1
Number of bits per element8

Product details

The 8 mA source and sink rating is typical for 5V CMOS bus transceivers. It can drive up to eight LSTTL loads or a handful of CMOS inputs on a short backplane trace. If your load requires more than 8 mA per line — say, driving an LED indicator or a relay coil — you will need a buffer or a higher-drive part like the SN74ABT2245DW (32 mA per channel). For pure logic-level translation between 5V domains, the 8 mA is sufficient and keeps the package cool.

Through-hole package – board integration note

The through-hole mounting means you can hand-solder it without a reflow oven, and it is easier to probe during debug.

Frequently asked questions

SN74AHCT245N pinout and function table?

The SN74AHCT245N uses the standard 20-pin DIP pinout for octal bus transceivers: pins 1 (DIR) and 19 (OE) control direction and output enable; pins 2-9 (A1-A8) and 11-18 (-) are the data ports; pin 10 is GND; pin 20 is VCC. The function table is: when OE is low and DIR is high, data flows from A to B; when OE is low and DIR is low, data flows from B to A; when OE is high, outputs are high-impedance.

SN74AHCT245N equivalent or replacement?

For a direct through-hole replacement, the SN74HCT245N is pin-compatible and functionally identical, but uses HCT logic thresholds instead of AHCT. The SN74ABT2245DW offers higher drive (32 mA) but is surface-mount and commercial temperature only. The SN74LS645-1N is another through-hole option but has lower drive (15 mA) and a narrower supply range.

Can SN74AHCT245N replace SN74HCT245N?

Yes, the SN74AHCT245N is pin-compatible and functionally identical to the SN74HCT245N. The AHCT family has slightly different input thresholds (TTL-compatible) and faster propagation delays, but in most 5V bus applications it is a drop-in replacement. Verify the timing in your specific bus cycle if running near the maximum frequency.