component
SN74HC273N
Public Made by Adomby adom
Texas Instruments Flip Flops, DIP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74HC273N
Texas Instruments · Flip Flops · DIP-20
SN74HC273N from Texas Instruments, in a DIP-20. 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 | CLR | input | Active low clear input; when low, forces all Q outputs low regardless of clock or data inputs |
| 2 | 1Q | output | Output of flip-flop 1; can drive up to 10 LSTTL loads with ±4 mA output drive at 5V |
| 3 | 1D | input | Data input for flip-flop 1; sampled on rising edge of CLK when CLR is inactive; meets setup and hold time requirements of section 6.8 |
| 4 | 2D | input | Data input for flip-flop 2; sampled on rising edge of CLK when CLR is inactive; meets setup and hold time requirements of section 6.8 |
| 5 | 2Q | output | Output of flip-flop 2; can drive up to 10 LSTTL loads with ±4 mA output drive at 5V |
| 6 | 3Q | output | Output of flip-flop 3; can drive up to 10 LSTTL loads with ±4 mA output drive at 5V |
| 7 | 3D | input | Data input for flip-flop 3; sampled on rising edge of CLK when CLR is inactive; meets setup and hold time requirements of section 6.8 |
| 8 | 4D | input | Data input for flip-flop 4; sampled on rising edge of CLK when CLR is inactive; meets setup and hold time requirements of section 6.8 |
| 9 | 4Q | output | Output of flip-flop 4; can drive up to 10 LSTTL loads with ±4 mA output drive at 5V |
| 10 | GND | power_in | Ground reference voltage |
| 11 | CLK | input | Clock input; rising edge triggers data transfer from D inputs to Q outputs; maximum frequency and minimum pulse duration requirements in section 6.8 |
| 12 | 5Q | output | Output of flip-flop 5; can drive up to 10 LSTTL loads with ±4 mA output drive at 5V |
| 13 | 5D | input | Data input for flip-flop 5; sampled on rising edge of CLK when CLR is inactive; meets setup and hold time requirements of section 6.8 |
| 14 | 6D | input | Data input for flip-flop 6; sampled on rising edge of CLK when CLR is inactive; meets setup and hold time requirements of section 6.8 |
| 15 | 6Q | output | Output of flip-flop 6; can drive up to 10 LSTTL loads with ±4 mA output drive at 5V |
| 16 | 7Q | output | Output of flip-flop 7; can drive up to 10 LSTTL loads with ±4 mA output drive at 5V |
| 17 | 7D | input | Data input for flip-flop 7; sampled on rising edge of CLK when CLR is inactive; meets setup and hold time requirements of section 6.8 |
| 18 | 8D | input | Data input for flip-flop 8; sampled on rising edge of CLK when CLR is inactive; meets setup and hold time requirements of section 6.8 |
| 19 | 8Q | output | Output of flip-flop 8; can drive up to 10 LSTTL loads with ±4 mA output drive at 5V |
| 20 | VCC | power_out | Power supply; operating voltage range 2V to 6V per section 6.3 recommended operating conditions |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | DIP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74HC273N - Footprint:
Package_DIP:DIP-20_W7.62mm - 3D model: DIP-20 (KiCad packages3D, STEP)
- 3D model files:
sn74hc273n-etched.step/sn74hc273n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc273n.step/sn74hc273n.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
c8f36a86a0f545d8, retrieved 2026-09-24, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).