SN74CB3T3257PWR

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  "type": "component",
  "slug": "sn74cb3t3257pwr",
  "title": "SN74CB3T3257PWR",
  "brief": "Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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    "mpn": "SN74CB3T3257PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74cb3t3257.pdf",
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    "distributor_links": {
      "lcsc": "C544573",
      "digikey": "296-17850-2-ND",
      "mouser": "595-SN74CB3T3257PWR"
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    },
    "pins": [
      {
        "number": "1",
        "name": "S",
        "type": "input",
        "description": "Select input that connects B1 (low) or B2 (high) to the A port when OE is low; control inputs accept up to 5.5 V."
      },
      {
        "number": "2",
        "name": "1B1",
        "type": "bidirectional",
        "description": "Channel 1 in/out 1 switch port, connected to 1A when OE is low and S is low; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "3",
        "name": "1B2",
        "type": "bidirectional",
        "description": "Channel 1 in/out 2 switch port, connected to 1A when OE is low and S is high; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "4",
        "name": "1A",
        "type": "bidirectional",
        "description": "Channel 1 out/in common switch port, which connects to 1B1 or 1B2 depending on S when OE is low; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "5",
        "name": "2B1",
        "type": "bidirectional",
        "description": "Channel 2 in/out 1 switch port, connected to 2A when OE is low and S is low; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "6",
        "name": "2B2",
        "type": "bidirectional",
        "description": "Channel 2 in/out 2 switch port, connected to 2A when OE is low and S is high; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "7",
        "name": "2A",
        "type": "bidirectional",
        "description": "Channel 2 out/in common switch port, which connects to 2B1 or 2B2 depending on S when OE is low; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "9",
        "name": "3A",
        "type": "bidirectional",
        "description": "Channel 3 out/in common switch port, which connects to 3B1 or 3B2 depending on S when OE is low; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "10",
        "name": "3B2",
        "type": "bidirectional",
        "description": "Channel 3 in/out 2 switch port, connected to 3A when OE is low and S is high; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "11",
        "name": "3B1",
        "type": "bidirectional",
        "description": "Channel 3 in/out 1 switch port, connected to 3A when OE is low and S is low; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "12",
        "name": "4A",
        "type": "bidirectional",
        "description": "Channel 4 out/in common switch port, which connects to 4B1 or 4B2 depending on S when OE is low; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "13",
        "name": "4B2",
        "type": "bidirectional",
        "description": "Channel 4 in/out 2 switch port, connected to 4A when OE is low and S is high; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "14",
        "name": "4B1",
        "type": "bidirectional",
        "description": "Channel 4 in/out 1 switch port, connected to 4A when OE is low and S is low; switch I/O voltage is specified from 0 V to 5.5 V."
      },
      {
        "number": "15",
        "name": "OE",
        "type": "input",
        "description": "Active-low output enable; driving it high places all channels in the high-impedance disconnect state."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply; the recommended operating range is 2.3 V to 3.6 V."
      }
    ],
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        "at": "2026-10-21T17:44:24"
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      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74cb3t3257.pdf",
        "pages": 29,
        "sha256": "975520e2dfdc31ad",
        "source_tier": "mfr"
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      "pins": {
        "total": 16,
        "described": 16,
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-16",
      "Category": "Logic",
      "Pins": "16"
    },
    "characteristics": {
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          "name": "Switch OFF leakage current",
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          "conditions": "VCC 3.6 V; VI = 0 V, VIN = VCC or GND; 0 ≤ VO ≤ 5.5 V; TA –40°C to +85°C",
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          "name": "ON-state switch leakage current (VI = VCC-0.7 to 5.5 V)",
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          "conditions": "VCC 3.6 V; VI = VCC-0.7 to 5.5 V; VIN = VCC or GND; TA –40°C to +85°C",
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          "name": "ON-state switch leakage current (VI = 0.7 to VCC-0.7 V)",
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          "name": "ON-state switch leakage current (VI = 0 to 0.7 V)",
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          "kind": "electrical",
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          "min": -5,
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          "conditions": "VCC 3.6 V; VI = 0 to 0.7 V; VIN = VCC or GND; TA –40°C to +85°C",
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        {
          "name": "Control input current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": -10,
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          "conditions": "VCC 3.6 V; VCC ≤ VIN ≤ 5.5 V or VIN = 0 V; TA –40°C to +85°C",
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        {
          "name": "Supply current (VI = VCC or GND)",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
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          "conditions": "VCC 3.6 V; VI = VCC or GND; Ii/o = 0; VIN = VCC or GND; TA –40°C to +85°C",
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          "name": "Supply current (VI = 5.5 V)",
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        {
          "name": "Quiescent device current with respect to control inputs",
          "symbol": "ΔICC",
          "kind": "electrical",
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          "min": null,
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          "conditions": "VCC 3 to 3.6 V; VIN = VCC - 0.6 V; other inputs at 0/VCC; TA –40°C to +85°C",
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          "name": "Clamp voltage",
          "symbol": "Vik",
          "kind": "electrical",
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          "max": -1.2,
          "conditions": "VCC 3 V; II = -18 mA; TA –40°C to +85°C",
          "source_page": 6,
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        {
          "name": "Enable time OE to A or B (VCC 2.5 V ± 0.2 V)",
          "symbol": "ten",
          "kind": "timing",
          "unit": "ns",
          "min": null,
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          "source_page": 7,
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        {
          "name": "Enable time OE to A or B (VCC 3.3 V ± 0.3 V)",
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          "source_page": 7,
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        {
          "name": "Disable time OE to A or B (VCC 2.5 V ± 0.2 V)",
          "symbol": "tdis",
          "kind": "timing",
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          "min": null,
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          "conditions": "VCC 2.5 V ± 0.2 V; LZ: RL = 250 Ω, CL = 30 pF, V△ = 0.15 V; HZ: RL = 500 Ω, CL = 30 pF, V△ = 0.15 V; 50 Ω termination at input",
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        {
          "name": "Disable time OE to A or B (VCC 3.3 V ± 0.3 V)",
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          "source_page": 7,
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        {
          "name": "Propagation delay S to A (VCC 2.5 V ± 0.2 V)",
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          "kind": "timing",
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        {
          "name": "Propagation delay S to A (VCC 3.3 V ± 0.3 V)",
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          "name": "Enable time S to B (VCC 2.5 V ± 0.2 V)",
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        {
          "name": "Supply voltage (absolute max)",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
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        {
          "name": "Control input voltage (absolute max)",
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          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
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          "name": "Voltage range applied to any output in high-impedance or power-off state",
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          "unit": "V",
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          "name": "Control input clamp current",
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          "name": "I/O port diode current",
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          "conditions": "VI/O < 0",
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          "name": "On-state switch current",
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          "conditions": "VI/O = 0 to VCC",
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          "name": "Continuous current through VCC or GND",
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          "typ": null,
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          "conditions": "",
          "source_page": 4,
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        {
          "name": "Junction temperature",
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          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
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          "name": "Storage temperature",
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          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
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        {
          "name": "Supply voltage (recommended)",
          "symbol": "VCC",
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          "name": "Switch input or output voltage (recommended)",
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          "name": "High-level input voltage, control input",
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