component
sn74hc273nsr
Public Unreviewedby Ray
lingxingic SN74HC273NSR LX Flip Flops, SOIC-20-208mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
README
markdownSN74HC273NSR
lingxingic SN74HC273NSR LX · Flip Flops · SOIC-20-208mil
SN74HC273NSR from lingxingic SN74HC273NSR LX, in a SOIC-20-208mil. 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 | MR | input | Master reset input, active low. Driving MR low asynchronously forces all eight Qn outputs to logic low, independent of CP and Dn. CMOS-level (HC) or TTL-level (HCT) input. |
| 2 | Q0 | output | Flip-flop 0 data output. Registered version of D0, updated on the rising edge of CP; forced low when MR is asserted low. |
| 3 | D0 | input | Flip-flop 0 data input. Sampled on the rising edge of CP and transferred to Q0, provided setup/hold times are met. |
| 4 | D1 | input | Flip-flop 1 data input. Sampled on the rising edge of CP and transferred to Q1. |
| 5 | Q1 | output | Flip-flop 1 data output. Registered version of D1; forced low when MR is asserted low. |
| 6 | Q2 | output | Flip-flop 2 data output. Registered version of D2; forced low when MR is asserted low. |
| 7 | D2 | input | Flip-flop 2 data input. Sampled on the rising edge of CP and transferred to Q2. |
| 8 | D3 | input | Flip-flop 3 data input. Sampled on the rising edge of CP and transferred to Q3. |
| 9 | Q3 | output | Flip-flop 3 data output. Registered version of D3; forced low when MR is asserted low. |
| 10 | GND | power_in | Ground reference, 0 V. Common return for VCC and all logic signals. |
| 11 | CP | input | Clock input, common to all eight flip-flops. Rising edge samples the Dn inputs into Qn (subject to setup/hold). Recommended input rise/fall rate ≤139 ns/V at VCC=4.5 V. |
| 12 | Q4 | output | Flip-flop 4 data output. Registered version of D4; forced low when MR is asserted low. |
| 13 | D4 | input | Flip-flop 4 data input. Sampled on the rising edge of CP and transferred to Q4. |
| 14 | D5 | input | Flip-flop 5 data input. Sampled on the rising edge of CP and transferred to Q5. |
| 15 | Q5 | output | Flip-flop 5 data output. Registered version of D5; forced low when MR is asserted low. |
| 16 | Q6 | output | Flip-flop 6 data output. Registered version of D6; forced low when MR is asserted low. |
| 17 | D6 | input | Flip-flop 6 data input. Sampled on the rising edge of CP and transferred to Q6. |
| 18 | D7 | input | Flip-flop 7 data input. Sampled on the rising edge of CP and transferred to Q7. |
| 19 | Q7 | output | Flip-flop 7 data output. Registered version of D7; forced low when MR is asserted low. |
| 20 | VCC | power_in | Positive supply voltage. Recommended 2.0-6.0 V for SN74HC273 and 4.5-5.5 V for SN74HCT273. Absolute maximum 7.0 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | lingxingic SN74HC273NSR LX |
| Package | SOIC-20-208mil |
| Category | Logic |
| Pins | 20 |
Ordering variants
SN74HC273NSRSN74HC273NSRNSN74HC273NSRDSN74HC273NSRPW
CAD (KiCad official)
- Symbol:
SN74HC273NSR - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-208mil (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: lingxingic SN74HC273NSR LX datasheet (None pp, sha256
a26108f4267548db, retrieved 2026-08-17, 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:
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).
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
PCB Footprint
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
Datasheet
Open in new tab ↗Loads on click. Unloads when scrolled away or the tab is hidden.