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SN74LS629D

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Texas Instruments Voltage Controlled Oscillators (VCOs), SOIC-16. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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SN74LS629D

Texas Instruments · Voltage Controlled Oscillators (VCOs) · SOIC-16

SN74LS629D from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 2FC input Frequency-control voltage input for VCO 2, which sets its output frequency together with the external capacitor.
2 1FC input Frequency-control voltage input for VCO 1, which sets its output frequency together with the external capacitor.
3 1RNG input Frequency-range voltage input for VCO 1.
4 1CX1 passive External timing capacitor or crystal connection 1 for VCO 1.
5 1CX2 passive External timing capacitor or crystal connection 2 for VCO 1.
6 1EN input Active-low enable for VCO 1: low enables the output, high disables the oscillator and drives 1Y high.
7 1Y output Square-wave output of VCO 1 with a duty cycle of approximately 50 percent, high when disabled.
8 OSC GND power_in Ground for the oscillator and frequency-control circuits, separate from the output-section GND.
9 GND power_in Ground for the enable, synchronization-gating and output sections.
10 2Y output Square-wave output of VCO 2 with a duty cycle of approximately 50 percent, high when disabled.
11 2EN input Active-low enable for VCO 2: low enables the output, high disables the oscillator and drives 2Y high.
12 2CX2 passive External timing capacitor or crystal connection 2 for VCO 2.
13 2CX1 passive External timing capacitor or crystal connection 1 for VCO 2.
14 2RNG input Frequency-range voltage input for VCO 2.
15 OSC VCC power_in Supply for the oscillator and frequency-control circuits, separate from the output-section VCC.
16 VCC power_in Supply for the enable, synchronization-gating and output sections; a single 5-V supply can power both VCC and OSC VCC.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-16
Category Crystals, Oscillators, Resonators
Pins 16

CAD (KiCad official)

  • Symbol: SN74LS629D
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: sn74ls629d-etched.step / sn74ls629d-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74ls629d.step / sn74ls629d.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 742c0c399ac9ea17, retrieved 2026-10-21, tier: lcsc)
  • 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