component
74HC257PW
Public Made by Adomby adom
Nexperia Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
74HC257PW
Nexperia · Signal Switches, Multiplexers, Decoders · TSSOP-16
74HC257PW from Nexperia, in a TSSOP-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 | S | input | Common data select input shared by all four multiplexers; it selects the nI0 inputs when LOW and the nI1 inputs when HIGH (Table 3). |
| 2 | 1I0 | input | Data input from source 0 for multiplexer 1; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 3 | 1I1 | input | Data input from source 1 for multiplexer 1; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 4 | 1Y | tri_state | 3-state multiplexer output 1; it goes to high-impedance (Z) when OE is HIGH. |
| 5 | 2I0 | input | Data input from source 0 for multiplexer 2; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 6 | 2I1 | input | Data input from source 1 for multiplexer 2; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 7 | 2Y | tri_state | 3-state multiplexer output 2; it goes to high-impedance (Z) when OE is HIGH. |
| 8 | GND | power_in | Ground (0 V) reference for all voltages. |
| 9 | 3Y | tri_state | 3-state multiplexer output 3; it goes to high-impedance (Z) when OE is HIGH. |
| 10 | 3I1 | input | Data input from source 1 for multiplexer 3; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 11 | 3I0 | input | Data input from source 0 for multiplexer 3; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 12 | 4Y | tri_state | 3-state multiplexer output 4; it goes to high-impedance (Z) when OE is HIGH. |
| 13 | 4I1 | input | Data input from source 1 for multiplexer 4; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 14 | 4I0 | input | Data input from source 0 for multiplexer 4; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 15 | OE | input | 3-state output enable input, active LOW; a HIGH level forces all outputs into the high-impedance OFF-state. |
| 16 | VCC | power_in | Supply voltage: recommended 2.0 V to 6.0 V for 74HC257 and 4.5 V to 5.5 V for 74HCT257; absolute maximum is -0.5 V to +7 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | TSSOP-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 (absolute maximum) | VCC | -0.5 | 7 | V | 4 | ||
| input clamping current | IIK | -20 | 20 | mA | VI < -0.5 V or VI > VCC + 0.5 V | 4 | |
| output clamping current | IOK | -20 | 20 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 4 | |
| output current | IO | -35 | 35 | mA | VO = -0.5 V to VCC + 0.5 V | 4 | |
| supply current | ICC | 70 | mA | 4 | |||
| ground current | IGND | -70 | mA | 4 | |||
| storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| total power dissipation | Ptot | 500 | mW | 4 | |||
| supply voltage (74HC257) | VCC | 2 | 5 | 6 | V | 5 | |
| input voltage | VI | 0 | V | 5 | |||
| output voltage | VO | 0 | V | 5 | |||
| ambient temperature | Tamb | -40 | 25 | 125 | °C | 5 | |
| input transition rise and fall rate | Δt/ΔV | 625 | ns/V | VCC = 2.0 V | 5 | ||
| input transition rise and fall rate | Δt/ΔV | 1.67 | 139 | ns/V | VCC = 4.5 V | 5 | |
| input transition rise and fall rate | Δt/ΔV | 83 | ns/V | VCC = 6.0 V | 5 | ||
| HIGH-level input voltage | VIH | 1.5 | 1.2 | V | VCC = 2.0 V; 25 °C | 5 | |
| HIGH-level input voltage | VIH | 3.15 | 2.4 | V | VCC = 4.5 V; 25 °C | 5 | |
| HIGH-level input voltage | VIH | 4.2 | 3.2 | V | VCC = 6.0 V; 25 °C | 5 | |
| LOW-level input voltage | VIL | 0.8 | 0.5 | V | VCC = 2.0 V; 25 °C | 5 | |
| LOW-level input voltage | VIL | 2.1 | 1.35 | V | VCC = 4.5 V; 25 °C | 5 | |
| LOW-level input voltage | VIL | 2.8 | 1.8 | V | VCC = 6.0 V; 25 °C | 5 | |
| HIGH-level output voltage | VOH | 1.9 | 2 | V | VI = VIH or VIL; IO = -20 μA; VCC = 2.0 V; 25 °C | 5 | |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | V | VI = VIH or VIL; IO = -20 μA; VCC = 4.5 V; 25 °C | 5 | |
| HIGH-level output voltage | VOH | 5.9 | 6 | V | VI = VIH or VIL; IO = -20 μA; VCC = 6.0 V; 25 °C | 5 | |
| HIGH-level output voltage | VOH | 3.98 | 4.32 | V | VI = VIH or VIL; IO = -6.0 mA; VCC = 4.5 V; 25 °C | 5 | |
| HIGH-level output voltage | VOH | 5.48 | 5.81 | V | VI = VIH or VIL; IO = -7.8 mA; VCC = 6.0 V; 25 °C | 5 | |
| LOW-level output voltage | VOL | 0 | 0.1 | V | VI = VIH or VIL; IO = 20 μA; VCC = 2.0 V; 25 °C | 5 | |
| LOW-level output voltage | VOL | 0.15 | 0.26 | V | VI = VIH or VIL; IO = 6.0 mA; VCC = 4.5 V; 25 °C | 5 | |
| LOW-level output voltage | VOL | 0.16 | 0.26 | V | VI = VIH or VIL; IO = 7.8 mA; VCC = 6.0 V; 25 °C | 5 | |
| input leakage current | II | -0.1 | 0.1 | μA | VI = VCC or GND; VCC = 6.0 V; 25 °C | 5 | |
| OFF-state output current | IOZ | -0.5 | 0.5 | μA | VI = VIH or VIL; VCC = 6.0 V; VO = VCC or GND; 25 °C | 5 | |
| supply current | ICC | 8 | μA | VI = VCC or GND; IO = 0 A; VCC = 6.0 V; 25 °C | 5 | ||
| propagation delay nI0/nI1 to nY | tpd | 36 | 110 | ns | VCC = 2.0 V; 25 °C; see Fig. 5 | 7 | |
| propagation delay nI0/nI1 to nY | tpd | 13 | 22 | ns | VCC = 4.5 V; 25 °C; see Fig. 5 | 7 | |
| propagation delay nI0/nI1 to nY | tpd | 10 | 19 | ns | VCC = 6.0 V; 25 °C; see Fig. 5 | 7 | |
| propagation delay S to nY | tpd | 47 | 150 | ns | VCC = 2.0 V; 25 °C; see Fig. 5 | 7 | |
| propagation delay S to nY | tpd | 17 | 30 | ns | VCC = 4.5 V; 25 °C; see Fig. 5 | 7 | |
| propagation delay S to nY | tpd | 14 | 26 | ns | VCC = 6.0 V; 25 °C; see Fig. 5 | 7 | |
| enable time OE to nY | ten | 33 | 150 | ns | VCC = 2.0 V; 25 °C; see Fig. 6 | 7 | |
| enable time OE to nY | ten | 12 | 30 | ns | VCC = 4.5 V; 25 °C; see Fig. 6 | 7 | |
| enable time OE to nY | ten | 10 | 26 | ns | VCC = 6.0 V; 25 °C; see Fig. 6 | 7 | |
| disable time OE to nY | tdis | 41 | 150 | ns | VCC = 2.0 V; 25 °C; see Fig. 6 | 7 | |
| disable time OE to nY | tdis | 15 | 30 | ns | VCC = 4.5 V; 25 °C; see Fig. 6 | 7 | |
| disable time OE to nY | tdis | 12 | 26 | ns | VCC = 6.0 V; 25 °C; see Fig. 6 | 7 | |
| transition time | tt | 14 | 60 | ns | VCC = 2.0 V; 25 °C; see Fig. 5 | 7 | |
| transition time | tt | 5 | 12 | ns | VCC = 4.5 V; 25 °C; see Fig. 5 | 7 | |
| transition time | tt | 4 | 10 | ns | VCC = 6.0 V; 25 °C; see Fig. 5 | 7 | |
| HIGH-level output voltage | VOH | 3.7 | V | VI = VIH or VIL; IO = -6.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 | ||
| HIGH-level output voltage | VOH | 5.2 | V | VI = VIH or VIL; IO = -7.8 mA; VCC = 6.0 V; -40 °C to +125 °C | 5 | ||
| LOW-level output voltage | VOL | 0.4 | V | VI = VIH or VIL; IO = 6.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 | ||
| input leakage current | II | -1 | 1 | μA | VI = VCC or GND; VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| OFF-state output current | IOZ | -10 | 10 | μA | VI = VIH or VIL; VCC = 6.0 V; VO = VCC or GND; -40 °C to +125 °C | 5 | |
| supply current | ICC | 160 | μA | VI = VCC or GND; IO = 0 A; VCC = 6.0 V; -40 °C to +125 °C | 5 |
CAD (KiCad official)
- Symbol:
74HC257PW - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
74hc257pw-etched.step/74hc257pw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74hc257pw.step/74hc257pw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (15 pp, sha256
9a5ab16a50053e88, retrieved 2026-10-18, 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).
# 74HC257PW
**Nexperia** · Signal Switches, Multiplexers, Decoders · TSSOP-16
74HC257PW from Nexperia, in a TSSOP-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 | S | input | Common data select input shared by all four multiplexers; it selects the nI0 inputs when LOW and the nI1 inputs when HIGH (Table 3). |
| 2 | 1I0 | input | Data input from source 0 for multiplexer 1; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 3 | 1I1 | input | Data input from source 1 for multiplexer 1; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 4 | 1Y | tri_state | 3-state multiplexer output 1; it goes to high-impedance (Z) when OE is HIGH. |
| 5 | 2I0 | input | Data input from source 0 for multiplexer 2; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 6 | 2I1 | input | Data input from source 1 for multiplexer 2; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 7 | 2Y | tri_state | 3-state multiplexer output 2; it goes to high-impedance (Z) when OE is HIGH. |
| 8 | GND | power_in | Ground (0 V) reference for all voltages. |
| 9 | 3Y | tri_state | 3-state multiplexer output 3; it goes to high-impedance (Z) when OE is HIGH. |
| 10 | 3I1 | input | Data input from source 1 for multiplexer 3; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 11 | 3I0 | input | Data input from source 0 for multiplexer 3; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 12 | 4Y | tri_state | 3-state multiplexer output 4; it goes to high-impedance (Z) when OE is HIGH. |
| 13 | 4I1 | input | Data input from source 1 for multiplexer 4; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 14 | 4I0 | input | Data input from source 0 for multiplexer 4; input voltage range is 0 V to VCC and the input includes a clamp diode. |
| 15 | OE | input | 3-state output enable input, active LOW; a HIGH level forces all outputs into the high-impedance OFF-state. |
| 16 | VCC | power_in | Supply voltage: recommended 2.0 V to 6.0 V for 74HC257 and 4.5 V to 5.5 V for 74HCT257; absolute maximum is -0.5 V to +7 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | TSSOP-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 (absolute maximum) | VCC | -0.5 | | 7 | V | | 4 |
| input clamping current | IIK | -20 | | 20 | mA | VI < -0.5 V or VI > VCC + 0.5 V | 4 |
| output clamping current | IOK | -20 | | 20 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 4 |
| output current | IO | -35 | | 35 | mA | VO = -0.5 V to VCC + 0.5 V | 4 |
| supply current | ICC | | | 70 | mA | | 4 |
| ground current | IGND | -70 | | | mA | | 4 |
| storage temperature | Tstg | -65 | | 150 | °C | | 4 |
| total power dissipation | Ptot | | | 500 | mW | | 4 |
| supply voltage (74HC257) | VCC | 2 | 5 | 6 | V | | 5 |
| input voltage | VI | 0 | | | V | | 5 |
| output voltage | VO | 0 | | | V | | 5 |
| ambient temperature | Tamb | -40 | 25 | 125 | °C | | 5 |
| input transition rise and fall rate | Δt/ΔV | | | 625 | ns/V | VCC = 2.0 V | 5 |
| input transition rise and fall rate | Δt/ΔV | | 1.67 | 139 | ns/V | VCC = 4.5 V | 5 |
| input transition rise and fall rate | Δt/ΔV | | | 83 | ns/V | VCC = 6.0 V | 5 |
| HIGH-level input voltage | VIH | 1.5 | 1.2 | | V | VCC = 2.0 V; 25 °C | 5 |
| HIGH-level input voltage | VIH | 3.15 | 2.4 | | V | VCC = 4.5 V; 25 °C | 5 |
| HIGH-level input voltage | VIH | 4.2 | 3.2 | | V | VCC = 6.0 V; 25 °C | 5 |
| LOW-level input voltage | VIL | | 0.8 | 0.5 | V | VCC = 2.0 V; 25 °C | 5 |
| LOW-level input voltage | VIL | | 2.1 | 1.35 | V | VCC = 4.5 V; 25 °C | 5 |
| LOW-level input voltage | VIL | | 2.8 | 1.8 | V | VCC = 6.0 V; 25 °C | 5 |
| HIGH-level output voltage | VOH | 1.9 | 2 | | V | VI = VIH or VIL; IO = -20 μA; VCC = 2.0 V; 25 °C | 5 |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | | V | VI = VIH or VIL; IO = -20 μA; VCC = 4.5 V; 25 °C | 5 |
| HIGH-level output voltage | VOH | 5.9 | 6 | | V | VI = VIH or VIL; IO = -20 μA; VCC = 6.0 V; 25 °C | 5 |
| HIGH-level output voltage | VOH | 3.98 | 4.32 | | V | VI = VIH or VIL; IO = -6.0 mA; VCC = 4.5 V; 25 °C | 5 |
| HIGH-level output voltage | VOH | 5.48 | 5.81 | | V | VI = VIH or VIL; IO = -7.8 mA; VCC = 6.0 V; 25 °C | 5 |
| LOW-level output voltage | VOL | | 0 | 0.1 | V | VI = VIH or VIL; IO = 20 μA; VCC = 2.0 V; 25 °C | 5 |
| LOW-level output voltage | VOL | | 0.15 | 0.26 | V | VI = VIH or VIL; IO = 6.0 mA; VCC = 4.5 V; 25 °C | 5 |
| LOW-level output voltage | VOL | | 0.16 | 0.26 | V | VI = VIH or VIL; IO = 7.8 mA; VCC = 6.0 V; 25 °C | 5 |
| input leakage current | II | -0.1 | | 0.1 | μA | VI = VCC or GND; VCC = 6.0 V; 25 °C | 5 |
| OFF-state output current | IOZ | -0.5 | | 0.5 | μA | VI = VIH or VIL; VCC = 6.0 V; VO = VCC or GND; 25 °C | 5 |
| supply current | ICC | | | 8 | μA | VI = VCC or GND; IO = 0 A; VCC = 6.0 V; 25 °C | 5 |
| propagation delay nI0/nI1 to nY | tpd | | 36 | 110 | ns | VCC = 2.0 V; 25 °C; see Fig. 5 | 7 |
| propagation delay nI0/nI1 to nY | tpd | | 13 | 22 | ns | VCC = 4.5 V; 25 °C; see Fig. 5 | 7 |
| propagation delay nI0/nI1 to nY | tpd | | 10 | 19 | ns | VCC = 6.0 V; 25 °C; see Fig. 5 | 7 |
| propagation delay S to nY | tpd | | 47 | 150 | ns | VCC = 2.0 V; 25 °C; see Fig. 5 | 7 |
| propagation delay S to nY | tpd | | 17 | 30 | ns | VCC = 4.5 V; 25 °C; see Fig. 5 | 7 |
| propagation delay S to nY | tpd | | 14 | 26 | ns | VCC = 6.0 V; 25 °C; see Fig. 5 | 7 |
| enable time OE to nY | ten | | 33 | 150 | ns | VCC = 2.0 V; 25 °C; see Fig. 6 | 7 |
| enable time OE to nY | ten | | 12 | 30 | ns | VCC = 4.5 V; 25 °C; see Fig. 6 | 7 |
| enable time OE to nY | ten | | 10 | 26 | ns | VCC = 6.0 V; 25 °C; see Fig. 6 | 7 |
| disable time OE to nY | tdis | | 41 | 150 | ns | VCC = 2.0 V; 25 °C; see Fig. 6 | 7 |
| disable time OE to nY | tdis | | 15 | 30 | ns | VCC = 4.5 V; 25 °C; see Fig. 6 | 7 |
| disable time OE to nY | tdis | | 12 | 26 | ns | VCC = 6.0 V; 25 °C; see Fig. 6 | 7 |
| transition time | tt | | 14 | 60 | ns | VCC = 2.0 V; 25 °C; see Fig. 5 | 7 |
| transition time | tt | | 5 | 12 | ns | VCC = 4.5 V; 25 °C; see Fig. 5 | 7 |
| transition time | tt | | 4 | 10 | ns | VCC = 6.0 V; 25 °C; see Fig. 5 | 7 |
| HIGH-level output voltage | VOH | 3.7 | | | V | VI = VIH or VIL; IO = -6.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 5.2 | | | V | VI = VIH or VIL; IO = -7.8 mA; VCC = 6.0 V; -40 °C to +125 °C | 5 |
| LOW-level output voltage | VOL | | | 0.4 | V | VI = VIH or VIL; IO = 6.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 |
| input leakage current | II | -1 | | 1 | μA | VI = VCC or GND; VCC = 6.0 V; -40 °C to +125 °C | 5 |
| OFF-state output current | IOZ | -10 | | 10 | μA | VI = VIH or VIL; VCC = 6.0 V; VO = VCC or GND; -40 °C to +125 °C | 5 |
| supply current | ICC | | | 160 | μA | VI = VCC or GND; IO = 0 A; VCC = 6.0 V; -40 °C to +125 °C | 5 |
## CAD (KiCad official)
- Symbol: `74HC257PW`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `74hc257pw-etched.step` / `74hc257pw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74hc257pw.step` / `74hc257pw.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588908150896668672) (15 pp, sha256 `9a5ab16a50053e88`, retrieved 2026-10-18, 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/74hc257pw-datasheet.pdf)