# PI3B3257LEX

**Diodes Incorporated** · Signal Switches, Multiplexers, Decoders · TSSOP-16

PI3B3257LEX from Diodes Incorporated, 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 | Select input that connects IA0-ID0 to YA-YD when LOW and IA1-ID1 when HIGH, with E selecting the disable state (page 1 truth table). |
| 2 | IA0 | input | Data input A0 of the first 2:1 mux channel, passed to YA when S = 0 and E = L. |
| 3 | IA1 | input | Data input A1 of the first 2:1 mux channel, passed to YA when S = 1 and E = L. |
| 4 | YA | tri_state | Channel A data output, three-state, forced to Hi-Z when E is HIGH; the switch adds about 5Ω on-resistance with near-zero propagation delay. |
| 5 | IB0 | input | Data input B0 of the second 2:1 mux channel, passed to YB when S = 0 and E = L. |
| 6 | IB1 | input | Data input B1 of the second 2:1 mux channel, passed to YB when S = 1 and E = L. |
| 7 | YB | tri_state | Channel B data output, three-state, forced to Hi-Z when E is HIGH; the switch adds about 5Ω on-resistance with near-zero propagation delay. |
| 8 | GND | power_in | Ground; must be connected to supply ground for proper device operation, and GND and VCC must be applied before any signal on I/O or control pins. |
| 9 | YC | tri_state | Channel C data output, three-state, forced to Hi-Z when E is HIGH; the switch adds about 5Ω on-resistance with near-zero propagation delay. |
| 10 | IC1 | input | Data input C1 of the third 2:1 mux channel, passed to YC when S = 1 and E = L; control inputs tolerate up to 3.6V regardless of VCC. |
| 11 | IC0 | input | Data input C0 of the third 2:1 mux channel, passed to YC when S = 0 and E = L; control inputs tolerate up to 3.6V regardless of VCC. |
| 12 | YD | tri_state | Channel D data output, three-state, forced to Hi-Z when E is HIGH; the switch adds about 5Ω on-resistance with near-zero propagation delay. |
| 13 | ID1 | input | Data input D1 of the fourth 2:1 mux channel, passed to YD when S = 1 and E = L. |
| 14 | ID0 | input | Data input D0 of the fourth 2:1 mux channel, passed to YD when S = 0 and E = L. |
| 15 | E | input | Active-low enable: when HIGH all Y outputs go Hi-Z (disable), and when LOW the selected inputs pass through per S; the datasheet states logic inputs may be driven up to 3.6V regardless of VCC. |
| 16 | VCC | power_in | 3.3V supply (3.3V ±10% over the operating range) with absolute maximum supply to ground of −0.5V to +4.6V; apply VCC before signals. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| 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 |
|---|---|---|---|---|---|---|---|
| Input HIGH Voltage | VIH | 2 |  |  | V | Guaranteed Logic HIGH Level; over operating range, VCC = 3.3V ±10% | 2 |
| Input LOW Voltage | VIL | -0.5 |  | 0.8 | V | Guaranteed Logic LOW Level; over operating range, VCC = 3.3V ±10% | 2 |
| Input HIGH Current | IIH | -1 |  | 1 | µA | VCC = Max., VIN = VCC | 2 |
| Input LOW Current | IIL | -1 |  | 1 | µA | VCC = Max., VIN = GND | 2 |
| High Impedance Output Current | IOZH | -1 |  | 1 | µA | 0 ≤ In, Yn ≤ VCC | 2 |
| Clamp Diode Voltage | VIK |  |  | -1.2 | V | VCC = Min., IIN = -18mA | 2 |
| Switch On-Resistance | RON |  | 5 | 8 | Ω | VCC = Min., VIN = 0.0V, Ion = 48mA or 64mA | 2 |
| Switch On-Resistance | RON |  | 8 | 17 | Ω | VCC = Min., VIN = 2.4V, ION = 15mA | 2 |
| Quiescent Power Supply Current | ICC |  | 0.1 | 3 | µA | VCC = Max. VIN = GND or VCC | 2 |
| Supply Current per Input @ TTL HIGH | ΔICC |  |  | 750 | µA | VCC = Max. VIN = 3.0 | 2 |
| Propagation Delay In to Yn | tIY |  |  | 0.25 | ns | CL = 50pF RL = 500Ω | 3 |
| Bus Select Time, Sn to Yn | tSY | 1 |  | 4.5 | ns | CL = 50pF RL = 500Ω | 3 |
| Bus Enable Time, E to Yn | tPZH / tPZL | 1 |  | 4.5 | ns | CL = 50pF RL = 500Ω | 3 |
| Bus Disable Time, E to Yn | tPHZ / tPLZ | 1 |  | 4.8 | ns | CL = 50pF RL = 500Ω | 3 |
| Storage Temperature | TSTG | -65 |  | 150 | °C |  | 2 |
| Ambient Temperature with Power Applied | TA | -40 |  | 85 | °C | Power applied | 2 |
| Supply Voltage to Ground Potential | VCC | -0.5 |  | 4.6 | V |  | 2 |
| DC Input Voltage | VIN | -0.5 |  | 4.6 | V |  | 2 |
| DC Output Current | IO |  |  | 120 | mA |  | 2 |
| Power Dissipation | PD |  |  | 0.5 | W |  | 2 |
| Ambient Temperature (operating range) | TA | -40 |  | 85 | °C | Over the Operating Range | 2 |
| Supply voltage tolerance | VCC | -10 |  | 10 | % | VCC = 3.3V ±10% over operating range | 2 |
| Logic control input drive voltage | VIN |  |  | 3.6 | V | Logic control inputs, regardless of supply voltage | 3 |

## CAD (KiCad official)

- Symbol: `PI3B3257LEX`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `pi3b3257lex-etched.step` / `pi3b3257lex-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pi3b3257lex.step` / `pi3b3257lex.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922882877493248) (8 pp, sha256 `4641b29839e67287`, retrieved 2026-10-19, 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/pi3b3257lex-datasheet.pdf)