component
SN74LS279AN
Public Made by Adomby adom
lingxingic Latches, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
SN74LS279AN
lingxingic · Latches · DIP-16
SN74LS279AN from lingxingic, in a DIP-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 | 1R | input | Data input 1R of latch 1, an active-low R input whose level, together with S, sets Q per the function table; the datasheet gives no further electrical limits for this pin. |
| 2 | 1S1 | input | Set input 1S1 of latch 1 (one of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote. |
| 3 | 1S2 | input | Set input 1S2 of latch 1 (second of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote. |
| 4 | 1Q | output | Data output 1Q of latch 1; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA. |
| 5 | 2R | input | Data input 2R of latch 2, an active-low R input that, together with S, sets Q per the function table. |
| 6 | 2S | input | Set input 2S of latch 2, which sets the latch when low per the function table. |
| 7 | 2Q | output | Data output 2Q of latch 2; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA. |
| 8 | GND | power_in | Ground (0 V) reference for all voltages in the datasheet. |
| 9 | 3Q | output | Data output 3Q of latch 3; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA. |
| 10 | 3R | input | Data input 3R of latch 3, an active-low R input that, together with S, sets Q per the function table. |
| 11 | 3S1 | input | Set input 3S1 of latch 3 (one of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote. |
| 12 | 3S2 | input | Set input 3S2 of latch 3 (second of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote. |
| 13 | 4Q | output | Data output 4Q of latch 4; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA. |
| 14 | 4R | input | Data input 4R of latch 4, an active-low R input that, together with S, sets Q per the function table. |
| 15 | 4S | input | Set input 4S of latch 4, which sets the latch when low per the function table. |
| 16 | VCC | power_in | Supply voltage, specified at 2.0 V to 6.0 V in the recommended operating conditions. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| Package | DIP-16 |
| Category | Logic |
| Pins | 16 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| supply voltage | VCC | -0.5 | 7 | V | 7 | ||
| supply current | ICC | 50 | mA | 7 | |||
| ground current | IGND | -50 | mA | 7 | |||
| input clamping current | IIK | -20 | 20 | mA | VI < -0.5V or VI > VCC+0.5V | 7 | |
| output clamping current | IOK | -20 | 20 | mA | VO < -0.5V or VO > VCC+0.5V | 7 | |
| output current | IO | -25 | 25 | mA | -0.5V < VO < VCC+0.5V | 7 | |
| storage temperature | Tstg | -65 | 150 | ℃ | 7 | ||
| soldering temperature | TL | 245 | ℃ | 10s, DIP package | 7 | ||
| supply voltage | VCC | 2 | 5 | 6 | V | 7 | |
| input voltage | VI | 0 | V | 7 | |||
| output voltage | VO | 0 | V | 7 | |||
| ambient temperature | Tamb | -40 | 125 | ℃ | 7 | ||
| HIGH-level input voltage | VIH | 1.5 | V | Tamb=-40℃ to +125℃; VCC=2.0V | 9 | ||
| HIGH-level input voltage | VIH | 3.15 | V | Tamb=-40℃ to +125℃; VCC=4.5V | 9 | ||
| HIGH-level input voltage | VIH | 4.2 | V | Tamb=-40℃ to +125℃; VCC=6.0V | 9 | ||
| LOW-level input voltage | VIL | 0.5 | V | Tamb=-40℃ to +125℃; VCC=2.0V | 9 | ||
| LOW-level input voltage | VIL | 1.35 | V | Tamb=-40℃ to +125℃; VCC=4.5V | 9 | ||
| LOW-level input voltage | VIL | 1.8 | V | Tamb=-40℃ to +125℃; VCC=6.0V | 9 | ||
| HIGH-level output voltage | VOH | 1.9 | V | Tamb=-40℃ to +125℃; VCC=2.0V; IO=-20uA | 9 | ||
| HIGH-level output voltage | VOH | 4.4 | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=-20uA | 9 | ||
| HIGH-level output voltage | VOH | 5.9 | V | Tamb=-40℃ to +125℃; VCC=6.0V; IO=-20uA | 9 | ||
| HIGH-level output voltage | VOH | 3.7 | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=-4.0mA | 9 | ||
| HIGH-level output voltage | VOH | 5.2 | V | Tamb=-40℃ to +125℃; VCC=6.0V; IO=-5.2mA | 9 | ||
| LOW-level output voltage | VOL | 0.1 | V | Tamb=-40℃ to +125℃; VCC=2.0V; IO=20uA | 9 | ||
| LOW-level output voltage | VOL | 0.4 | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=4.0mA | 9 | ||
| input leakage current | II | -4 | 4 | uA | Tamb=-40℃ to +125℃; VCC=6.0V; VI=VCC or GND | 9 | |
| supply current | ICC | 4 | uA | Tamb=-40℃ to +125℃; VCC=6.0V; VI=VCC or GND; IO=0A | 9 | ||
| propagation delay, S1, S2 to Q | tPLH, tPHL | 182 | ns | Tamb=-40℃ to +125℃; VCC=2.0V; CL=50pF; see Figure 4 | 11 | ||
| propagation delay, S1, S2 to Q | tPLH, tPHL | 36 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF | 11 | ||
| propagation delay, S1, S2 to Q | tPLH, tPHL | 31 | ns | Tamb=-40℃ to +125℃; VCC=6.0V; CL=50pF | 11 | ||
| propagation delay, S to Q | tPLH, tPHL | 138 | ns | Tamb=-40℃ to +125℃; VCC=2.0V; CL=50pF; see Figure 4 | 11 | ||
| propagation delay, S to Q | tPLH, tPHL | 28 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF | 11 | ||
| propagation delay, S to Q | tPLH, tPHL | 23 | ns | Tamb=-40℃ to +125℃; VCC=6.0V; CL=50pF | 11 | ||
| propagation delay, R to Q | tPLH, tPHL | 165 | ns | Tamb=-40℃ to +125℃; VCC=2.0V; CL=50pF; see Figure 4 | 11 | ||
| propagation delay, R to Q | tPLH, tPHL | 33 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF | 11 | ||
| propagation delay, R to Q | tPLH, tPHL | 29 | ns | Tamb=-40℃ to +125℃; VCC=6.0V; CL=50pF | 11 | ||
| transition time | tTHL, tTLH | 105 | ns | Tamb=-40℃ to +125℃; VCC=2.0V; CL=50pF; see Figure 4 | 11 | ||
| transition time | tTHL, tTLH | 21 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF | 11 | ||
| transition time | tTHL, tTLH | 18 | ns | Tamb=-40℃ to +125℃; VCC=6.0V; CL=50pF | 11 | ||
| HIGH-level input voltage | VIH | 1.5 | 1.2 | V | Tamb=-40℃ to +85℃; VCC=2.0V | 8 | |
| HIGH-level input voltage | VIH | 3.15 | 2.4 | V | Tamb=-40℃ to +85℃; VCC=4.5V | 8 | |
| HIGH-level input voltage | VIH | 4.2 | 3.2 | V | Tamb=-40℃ to +85℃; VCC=6.0V | 8 | |
| LOW-level input voltage | VIL | 0.8 | 0.5 | V | Tamb=-40℃ to +85℃; VCC=2.0V | 8 | |
| LOW-level input voltage | VIL | 2.1 | 1.35 | V | Tamb=-40℃ to +85℃; VCC=4.5V | 8 | |
| LOW-level input voltage | VIL | 2.8 | 1.8 | V | Tamb=-40℃ to +85℃; VCC=6.0V | 8 | |
| HIGH-level output voltage | VOH | 1.9 | 2 | V | Tamb=-40℃ to +85℃; VCC=2.0V; IO=-20uA | 8 | |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=-20uA | 8 | |
| HIGH-level output voltage | VOH | 5.9 | 6 | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=-20uA | 8 | |
| HIGH-level output voltage | VOH | 3.84 | 4.32 | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=-4.0mA | 8 | |
| HIGH-level output voltage | VOH | 5.34 | 5.81 | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=-5.2mA | 8 | |
| LOW-level output voltage | VOL | 0 | 0.1 | V | Tamb=-40℃ to +85℃; VCC=2.0V; IO=20uA | 8 | |
| LOW-level output voltage | VOL | 0.15 | 0.33 | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=4.0mA | 8 | |
| LOW-level output voltage | VOL | 0.16 | 0.33 | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=5.2mA | 8 | |
| input leakage current | II | -2 | 2 | uA | Tamb=-40℃ to +85℃; VCC=6.0V; VI=VCC or GND | 8 | |
| supply current | ICC | 2 | uA | Tamb=-40℃ to +85℃; VCC=6.0V; VI=VCC or GND; IO=0A | 8 |
CAD (KiCad official)
- Symbol:
SN74LS279AN - Footprint:
Package_DIP:DIP-16_W7.62mm - 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files:
sn74ls279an-etched.step/sn74ls279an-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ls279an.step/sn74ls279an.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: lingxingic datasheet (17 pp, sha256
504e78937b9aca6f, retrieved 2026-10-14, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).
# SN74LS279AN
**lingxingic** · Latches · DIP-16
SN74LS279AN from lingxingic, in a DIP-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 | 1R | input | Data input 1R of latch 1, an active-low R input whose level, together with S, sets Q per the function table; the datasheet gives no further electrical limits for this pin. |
| 2 | 1S1 | input | Set input 1S1 of latch 1 (one of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote. |
| 3 | 1S2 | input | Set input 1S2 of latch 1 (second of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote. |
| 4 | 1Q | output | Data output 1Q of latch 1; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA. |
| 5 | 2R | input | Data input 2R of latch 2, an active-low R input that, together with S, sets Q per the function table. |
| 6 | 2S | input | Set input 2S of latch 2, which sets the latch when low per the function table. |
| 7 | 2Q | output | Data output 2Q of latch 2; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA. |
| 8 | GND | power_in | Ground (0 V) reference for all voltages in the datasheet. |
| 9 | 3Q | output | Data output 3Q of latch 3; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA. |
| 10 | 3R | input | Data input 3R of latch 3, an active-low R input that, together with S, sets Q per the function table. |
| 11 | 3S1 | input | Set input 3S1 of latch 3 (one of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote. |
| 12 | 3S2 | input | Set input 3S2 of latch 3 (second of two S inputs); the latch is set when either or both S inputs are low, per the function table footnote. |
| 13 | 4Q | output | Data output 4Q of latch 4; the datasheet gives no electrical limits for this pin beyond the absolute maximum output current of ±25 mA. |
| 14 | 4R | input | Data input 4R of latch 4, an active-low R input that, together with S, sets Q per the function table. |
| 15 | 4S | input | Set input 4S of latch 4, which sets the latch when low per the function table. |
| 16 | VCC | power_in | Supply voltage, specified at 2.0 V to 6.0 V in the recommended operating conditions. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| Package | DIP-16 |
| Category | Logic |
| Pins | 16 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| supply voltage | VCC | -0.5 | | 7 | V | | 7 |
| supply current | ICC | | | 50 | mA | | 7 |
| ground current | IGND | -50 | | | mA | | 7 |
| input clamping current | IIK | -20 | | 20 | mA | VI < -0.5V or VI > VCC+0.5V | 7 |
| output clamping current | IOK | -20 | | 20 | mA | VO < -0.5V or VO > VCC+0.5V | 7 |
| output current | IO | -25 | | 25 | mA | -0.5V < VO < VCC+0.5V | 7 |
| storage temperature | Tstg | -65 | | 150 | ℃ | | 7 |
| soldering temperature | TL | | | 245 | ℃ | 10s, DIP package | 7 |
| supply voltage | VCC | 2 | 5 | 6 | V | | 7 |
| input voltage | VI | 0 | | | V | | 7 |
| output voltage | VO | 0 | | | V | | 7 |
| ambient temperature | Tamb | -40 | | 125 | ℃ | | 7 |
| HIGH-level input voltage | VIH | 1.5 | | | V | Tamb=-40℃ to +125℃; VCC=2.0V | 9 |
| HIGH-level input voltage | VIH | 3.15 | | | V | Tamb=-40℃ to +125℃; VCC=4.5V | 9 |
| HIGH-level input voltage | VIH | 4.2 | | | V | Tamb=-40℃ to +125℃; VCC=6.0V | 9 |
| LOW-level input voltage | VIL | | | 0.5 | V | Tamb=-40℃ to +125℃; VCC=2.0V | 9 |
| LOW-level input voltage | VIL | | | 1.35 | V | Tamb=-40℃ to +125℃; VCC=4.5V | 9 |
| LOW-level input voltage | VIL | | | 1.8 | V | Tamb=-40℃ to +125℃; VCC=6.0V | 9 |
| HIGH-level output voltage | VOH | 1.9 | | | V | Tamb=-40℃ to +125℃; VCC=2.0V; IO=-20uA | 9 |
| HIGH-level output voltage | VOH | 4.4 | | | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=-20uA | 9 |
| HIGH-level output voltage | VOH | 5.9 | | | V | Tamb=-40℃ to +125℃; VCC=6.0V; IO=-20uA | 9 |
| HIGH-level output voltage | VOH | 3.7 | | | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=-4.0mA | 9 |
| HIGH-level output voltage | VOH | 5.2 | | | V | Tamb=-40℃ to +125℃; VCC=6.0V; IO=-5.2mA | 9 |
| LOW-level output voltage | VOL | | | 0.1 | V | Tamb=-40℃ to +125℃; VCC=2.0V; IO=20uA | 9 |
| LOW-level output voltage | VOL | | | 0.4 | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=4.0mA | 9 |
| input leakage current | II | -4 | | 4 | uA | Tamb=-40℃ to +125℃; VCC=6.0V; VI=VCC or GND | 9 |
| supply current | ICC | | | 4 | uA | Tamb=-40℃ to +125℃; VCC=6.0V; VI=VCC or GND; IO=0A | 9 |
| propagation delay, S1, S2 to Q | tPLH, tPHL | | | 182 | ns | Tamb=-40℃ to +125℃; VCC=2.0V; CL=50pF; see Figure 4 | 11 |
| propagation delay, S1, S2 to Q | tPLH, tPHL | | | 36 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF | 11 |
| propagation delay, S1, S2 to Q | tPLH, tPHL | | | 31 | ns | Tamb=-40℃ to +125℃; VCC=6.0V; CL=50pF | 11 |
| propagation delay, S to Q | tPLH, tPHL | | | 138 | ns | Tamb=-40℃ to +125℃; VCC=2.0V; CL=50pF; see Figure 4 | 11 |
| propagation delay, S to Q | tPLH, tPHL | | | 28 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF | 11 |
| propagation delay, S to Q | tPLH, tPHL | | | 23 | ns | Tamb=-40℃ to +125℃; VCC=6.0V; CL=50pF | 11 |
| propagation delay, R to Q | tPLH, tPHL | | | 165 | ns | Tamb=-40℃ to +125℃; VCC=2.0V; CL=50pF; see Figure 4 | 11 |
| propagation delay, R to Q | tPLH, tPHL | | | 33 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF | 11 |
| propagation delay, R to Q | tPLH, tPHL | | | 29 | ns | Tamb=-40℃ to +125℃; VCC=6.0V; CL=50pF | 11 |
| transition time | tTHL, tTLH | | | 105 | ns | Tamb=-40℃ to +125℃; VCC=2.0V; CL=50pF; see Figure 4 | 11 |
| transition time | tTHL, tTLH | | | 21 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF | 11 |
| transition time | tTHL, tTLH | | | 18 | ns | Tamb=-40℃ to +125℃; VCC=6.0V; CL=50pF | 11 |
| HIGH-level input voltage | VIH | 1.5 | 1.2 | | V | Tamb=-40℃ to +85℃; VCC=2.0V | 8 |
| HIGH-level input voltage | VIH | 3.15 | 2.4 | | V | Tamb=-40℃ to +85℃; VCC=4.5V | 8 |
| HIGH-level input voltage | VIH | 4.2 | 3.2 | | V | Tamb=-40℃ to +85℃; VCC=6.0V | 8 |
| LOW-level input voltage | VIL | | 0.8 | 0.5 | V | Tamb=-40℃ to +85℃; VCC=2.0V | 8 |
| LOW-level input voltage | VIL | | 2.1 | 1.35 | V | Tamb=-40℃ to +85℃; VCC=4.5V | 8 |
| LOW-level input voltage | VIL | | 2.8 | 1.8 | V | Tamb=-40℃ to +85℃; VCC=6.0V | 8 |
| HIGH-level output voltage | VOH | 1.9 | 2 | | V | Tamb=-40℃ to +85℃; VCC=2.0V; IO=-20uA | 8 |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=-20uA | 8 |
| HIGH-level output voltage | VOH | 5.9 | 6 | | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=-20uA | 8 |
| HIGH-level output voltage | VOH | 3.84 | 4.32 | | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=-4.0mA | 8 |
| HIGH-level output voltage | VOH | 5.34 | 5.81 | | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=-5.2mA | 8 |
| LOW-level output voltage | VOL | | 0 | 0.1 | V | Tamb=-40℃ to +85℃; VCC=2.0V; IO=20uA | 8 |
| LOW-level output voltage | VOL | | 0.15 | 0.33 | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=4.0mA | 8 |
| LOW-level output voltage | VOL | | 0.16 | 0.33 | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=5.2mA | 8 |
| input leakage current | II | -2 | | 2 | uA | Tamb=-40℃ to +85℃; VCC=6.0V; VI=VCC or GND | 8 |
| supply current | ICC | | | 2 | uA | Tamb=-40℃ to +85℃; VCC=6.0V; VI=VCC or GND; IO=0A | 8 |
## CAD (KiCad official)
- Symbol: `SN74LS279AN`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files: `sn74ls279an-etched.step` / `sn74ls279an-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ls279an.step` / `sn74ls279an.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [lingxingic datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604435746656690176) (17 pp, sha256 `504e78937b9aca6f`, retrieved 2026-10-14, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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).
[Datasheet PDF](docs/sn74ls279an-datasheet.pdf)