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Texas Instruments SN74AC245DBR — Logic ICs

SN74AC245DBR 74AC Transceiver, 24mA, 20-SSOP, Active

MPNSN74AC245DBR
End of Life

Texas Instruments 74AC series SN74AC245DBR, Transceiver, Non-Inverting, 3-State, 1 Element, 8 Bit per Element, 24mA Output, 2V to 6V Supply, -40°C to 85°C, Surface Mount 20-SSOP.

$0.91Ref. price · indicative, final on quote
Texas Instruments SN74AC245DBR datasheet (PDF)
Packaging20-SSOP (0.209", 5.30mm Width)
RoHSROHS3 Compliant
Series74AC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74AC245DBR specifications
ParameterValue
Series74AC
Logic typeTransceiver, Non-Inverting
Output type3-State
MountingSurface Mount
Supply voltage2V ~ 6V
Current - output high, low24mA, 24mA
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case20-SSOP (0.209\", 5.30mm Width)
Number of elements1
Number of bits per element8

Product details

What the 2V–6V supply range buys you

The SN74AC245DBR is a Texas Instruments 74AC-series 8-bit non-inverting transceiver with 3-state outputs. The wide supply range from 2V to 6V means it can interface directly with 3.3V and 5V logic families on the same board without external level shifters — a practical advantage when bridging a 3.3V MCU to a 5V peripheral bus. Output drive is 24mA per channel, enough for most backplane or memory-bus loads, though you'll want to check the capacitive load if the trace runs more than a few inches.

The 20-SSOP package (0.209-inch body width, 5.30mm) is a standard 1.27mm pitch gull-wing lead form.

Frequently asked questions

What is the difference between SN74AC245 and SN74HCT245?

The SN74AC245 runs from 2V to 6V and uses advanced CMOS (AC) logic for higher speed and lower power at 3.3V. The SN74HCT245 is a TTL-compatible version that operates at 4.5V to 5.5V and has slower propagation delays. If your design runs at 3.3V, the 74AC245 is the better fit; at 5V with TTL thresholds, the 74HCT245 works.