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SN74HC594DR

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Texas Instruments Shifting Register, SOIC-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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SN74HC594DR

Texas Instruments · Shifting Register · SOIC-16

SN74HC594DR from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 QB output Storage register parallel output B. High-current CMOS output driven from bit B of the 8-bit D-type storage register; typical drive ±6 mA at VCC = 5 V.
2 QC output Storage register parallel output C. High-current CMOS output driven from bit C of the 8-bit D-type storage register.
3 QD output Storage register parallel output D. High-current CMOS output driven from bit D of the 8-bit D-type storage register.
4 QE output Storage register parallel output E. High-current CMOS output driven from bit E of the 8-bit D-type storage register.
5 QF output Storage register parallel output F. High-current CMOS output driven from bit F of the 8-bit D-type storage register.
6 QG output Storage register parallel output G. High-current CMOS output driven from bit G of the 8-bit D-type storage register.
7 QH output Storage register parallel output H (last bit). High-current CMOS output driven from bit H of the 8-bit D-type storage register.
8 GND power_in Ground reference (0 V) for the device.
9 QH' output Serial output from the last stage of the shift register (QH inverted / cascade output). Used to cascade multiple SN74HC594 devices for shift registers wider than 8 bits.
10 SRCLR input Active-low shift-register clear. Asynchronously resets all bits of the 8-bit shift register to 0 when driven low, overriding SRCLK.
11 SRCLK input Shift-register clock. On each positive (rising) edge, the value on SER is shifted into the first bit of the 8-bit shift register.
12 RCLK input Storage-register (output latch) clock. Positive edge transfers the contents of the shift register into the 8-bit D-type storage register that drives QA-QH.
13 RCLR input Active-low storage-register clear. Asynchronously resets all bits of the 8-bit output storage register to 0 when driven low, overriding RCLK.
14 SER input Serial data input. Sampled on the rising edge of SRCLK and shifted into the first bit of the 8-bit shift register.
15 QA output Storage register parallel output A (first bit). High-current CMOS output driven from bit A of the 8-bit D-type storage register.
16 VCC power_in Positive supply voltage, 2 V to 6 V recommended operating range (absolute max 7 V). Bypass with a 0.1 µF ceramic capacitor close to the pin.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-16
Category Logic
Pins 16

Ordering variants

Same part, different packaging or reel option.

  • SN74HC594DR
  • SN74HC594DRD
  • SN74HC594DRDW
  • SN74HC594DRDWR
  • SN74HC594DRN
  • SN74HC594DRNE

CAD (KiCad official)

  • Symbol: SN74HC594DR
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: sn74hc594dr-etched.step / sn74hc594dr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74hc594dr.step / sn74hc594dr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 62c6a3d5a2bda363, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF