TM74HC595

{
  "schema_version": 1,
  "type": "component",
  "slug": "tm74hc595",
  "title": "TM74HC595",
  "brief": "TM Shenzhen Titan Micro Elec Shifting Register, SOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "tm74hc595"
  ],
  "component": {
    "mpn": "TM74HC595",
    "manufacturer": "TM Shenzhen Titan Micro Elec",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Shifting Register",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9a69eb73354ec1d6c6428f1e2e0d0f0f.pdf",
    "parts": {
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      "footprint": "tm74hc595.kicad_mod",
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      "model_3d_plain": "tm74hc595.glb",
      "model_3d_step": "tm74hc595-etched.step",
      "model_3d_step_plain": "tm74hc595.step",
      "lbr": "tm74hc595.lbr"
    },
    "distributor_links": {
      "lcsc": "C79097"
    },
    "pins": [
      {
        "number": "1",
        "name": "QB",
        "type": "tri_state",
        "description": "Parallel tri-state output B (bit 2 of the storage register). Drives up to IO = ±6.0 mA at VDD = 4.5 V (±7.8 mA at 6.0 V). Placed in high-impedance when /OE is high."
      },
      {
        "number": "2",
        "name": "QC",
        "type": "tri_state",
        "description": "Parallel tri-state output C (bit 3 of the storage register). Same drive characteristics as QA-QH. High-impedance when /OE is high."
      },
      {
        "number": "3",
        "name": "QD",
        "type": "tri_state",
        "description": "Parallel tri-state output D (bit 4 of the storage register). Same drive characteristics as QA-QH. High-impedance when /OE is high."
      },
      {
        "number": "4",
        "name": "QE",
        "type": "tri_state",
        "description": "Parallel tri-state output E (bit 5 of the storage register). Same drive characteristics as QA-QH. High-impedance when /OE is high."
      },
      {
        "number": "5",
        "name": "QF",
        "type": "tri_state",
        "description": "Parallel tri-state output F (bit 6 of the storage register). Same drive characteristics as QA-QH. High-impedance when /OE is high."
      },
      {
        "number": "6",
        "name": "QG",
        "type": "tri_state",
        "description": "Parallel tri-state output G (bit 7 of the storage register). Same drive characteristics as QA-QH. High-impedance when /OE is high."
      },
      {
        "number": "7",
        "name": "QH",
        "type": "tri_state",
        "description": "Parallel tri-state output H (bit 8, last stage of the storage register). Same drive characteristics as QA-QH. High-impedance when /OE is high."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (negative supply) reference for the device. Connect to system 0 V."
      },
      {
        "number": "9",
        "name": "SQH",
        "type": "output",
        "description": "Serial data output - the shifted-out data from the last stage (QH) of the internal shift register. Used to cascade to the SI input of the next TM74HC595 for chains longer than 8 bits. Not tri-stated by /OE."
      },
      {
        "number": "10",
        "name": "SCLR",
        "type": "input",
        "description": "Active-low shift-register clear (/SCLR). Driving this pin low asynchronously resets all stages of the shift register to 0; it does not affect the output storage latches until an RCK rising edge transfers the cleared data."
      },
      {
        "number": "11",
        "name": "SCK",
        "type": "input",
        "description": "Shift-register clock input. Serial data on SI is sampled on the rising edge of SCK and shifted through the internal 8-bit shift register (SPI-compatible). Max frequency > 25 MHz."
      },
      {
        "number": "12",
        "name": "RCK",
        "type": "input",
        "description": "Storage-register (latch) clock input. On the rising edge of RCK, the current contents of the shift register are transferred to the 8-bit output storage latches and appear on QA-QH (subject to /OE)."
      },
      {
        "number": "13",
        "name": "OE",
        "type": "input",
        "description": "Active-low output enable (/OE). When low, QA-QH drive the latched storage-register values; when high, QA-QH go to high impedance. Does not affect SQH or the shift-register contents."
      },
      {
        "number": "14",
        "name": "SI",
        "type": "input",
        "description": "Serial data input. Data present on SI is clocked into the first stage of the shift register on the rising edge of SCK. Setup time tsu ≈ 3.0 ns (VDD=5.0 V), hold time th ≈ 2.0 ns."
      },
      {
        "number": "15",
        "name": "QA",
        "type": "tri_state",
        "description": "Parallel tri-state output A (bit 1, first stage of the storage register). Drives up to IO = ±6.0 mA at VDD = 4.5 V (±7.8 mA at 6.0 V). High-impedance when /OE is high."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input. Recommended operating range 2.0 V to 5.5 V. Quiescent current Icc ≈ 4 µA (max at 25 °C, 6 V)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/9a69eb73354ec1d6c6428f1e2e0d0f0f.pdf",
        "pages": 8,
        "sha256": "6212ea9b2c26f3b1",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -4.445
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-16_3.9x9.9mm_P1.27mm@sha256:f9b5075740f7816c",
      "mark": "drawn"
    },
    "logic": {
      "family_id": "74HC595",
      "logic_family": "74HC",
      "function_code": "595",
      "function_class": "ShiftRegister",
      "function_name": "8-Bit SIPO Shift Register with Output Latch",
      "manufacturer": "Titan Micro (Shenzhen)",
      "is_specialty": false
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tm74hc595-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b8b4699796af635d592da2ab7ce415caa1f1d04ef099060137b6150cb8923ee6",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "TM Shenzhen Titan Micro Elec",
      "Package": "SOP-16",
      "Category": "Logic",
      "Pins": "16"
    }
  },
  "sections": [
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    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "tm74hc595"
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  "discovery_pitch": "TM74HC595 (TM Shenzhen Titan Micro Elec) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "tm74hc595.kicad_sym",
    "tm74hc595.kicad_mod",
    "tm74hc595.glb",
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    "tm74hc595-etched.step",
    "tm74hc595.lbr",
    "docs/hero.png",
    "docs/tm74hc595-datasheet.pdf",
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T10:58:09.330Z"
}