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SN75477D

SN75477D Peripheral Driver, 300 mA Output, 8-SOIC

MPNSN75477D
End of Life

Texas Instruments SN75477D peripheral driver, 2-element, 1-bit per element, 300 mA output, 4.5 V to 5.5 V supply, 0°C to 70°C, 8-SOIC surface mount.

$1.11Ref. price · indicative, final on quote
Texas Instruments SN75477D datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN75477D specifications
ParameterValue
Logic typePeripheral Driver
MountingSurface Mount
Supply voltage4.5V ~ 5.5V
Current - output high, low-, 300mA
Operating temperature0°C ~ 70°C (TA)
PackageTube
Case8-SOIC (0.154\", 3.90mm Width)
Number of elements2
Number of bits per element1

Product details

Two 300 mA outputs in an 8-SOIC — what that buys the board

Each of the two independent elements sinks up to 300 mA, which is enough to pull in a standard automotive relay or drive a bank of LEDs without an external transistor.

If you are qualifying a second source for supply resilience, the functional equivalent search should target other dual peripheral drivers in 8-SOIC with similar output current — the SN75477D is not pin-compatible with octal transceivers or bus buffers, so don't waste time on those.

If you are replacing a blown part on a board, the scorch mark on the PCB will align with that 8-pin SOIC pattern — measure the width to confirm it's the narrow version, not the wide 7.5 mm body. The shipping medium is Tube, not Tape & Reel, so factor in hand-placement or tube-feeder handling if you are running high-volume pick-and-place.

Frequently asked questions

What is the output current capability of the SN75477D?

Each of the two driver elements can sink 300 mA continuously. That rating covers relay coils, solenoid valves, small DC motors, and LED arrays — but not high-inrush loads like incandescent lamps without derating the per-channel current against the package thermal limit.