component
MC74HC4538ADR2G
Public Made by Adomby adom
onsemi Monostable Multivibrators, SOIC-16. Pinout settled in review by an AI reviewer against the manufacturer's datasheet, KiCad symbol/footprint/3D.
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"package": "SOIC-16",
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"category": "Logic ICs",
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"distributor_links": {
"lcsc": "C233614",
"digikey": "MC74HC4538ADR2GOSTR-ND",
"mouser": "863-MC74HC4538ADR2G"
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"number": "1",
"name": "GND",
"type": "power_in",
"description": "External ground; the external timing capacitors discharge to ground through this pin, and it must be hard-wired to GND."
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{
"number": "2",
"name": "CX1/RX1",
"type": "passive",
"description": "External timing component connection for multivibrator 1, tied to the common point of Rx and Cx; polystyrene capacitors are recommended and electrolytic capacitors are not recommended due to high leakage."
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{
"number": "3",
"name": "RESET 1",
"type": "input",
"description": "Active-low reset input; a low level forces Q1 low and NQ1 high regardless of the output pulse circuitry."
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{
"number": "4",
"name": "A1",
"type": "input",
"description": "Positive-edge trigger input for multivibrator 1, triggered by a rising edge when B1 is high."
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{
"number": "5",
"name": "B1",
"type": "input",
"description": "Negative-edge trigger input for multivibrator 1, triggered by a falling edge when A1 is low."
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{
"number": "6",
"name": "Q1",
"type": "output",
"description": "Noninverted monostable output 1, normally low, pulsing high when multivibrator 1 is triggered; pulse width set by Rx and Cx."
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{
"number": "7",
"name": "~{Q1}",
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"description": "Inverted monostable output 1, normally high, pulsing low when multivibrator 1 is triggered."
},
{
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"type": "power_in",
"description": "Ground connection, identified as GND (pin 8) on the logic diagram."
},
{
"number": "9",
"name": "~{Q2}",
"type": "output",
"description": "Inverted monostable output 2, normally high, pulsing low when multivibrator 2 is triggered."
},
{
"number": "10",
"name": "Q2",
"type": "output",
"description": "Noninverted monostable output 2, normally low, pulsing high when multivibrator 2 is triggered; pulse width set by Rx and Cx."
},
{
"number": "11",
"name": "B2",
"type": "input",
"description": "Negative-edge trigger input for multivibrator 2, triggered by a falling edge when A2 is low."
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{
"number": "12",
"name": "A2",
"type": "input",
"description": "Positive-edge trigger input for multivibrator 2, triggered by a rising edge when B2 is high."
},
{
"number": "13",
"name": "RESET 2",
"type": "input",
"description": "Active-low reset input; a low level forces Q2 low and NQ2 high regardless of the output pulse circuitry."
},
{
"number": "14",
"name": "CX2/RX2",
"type": "passive",
"description": "External timing component connection for multivibrator 2, tied to the common point of Rx and Cx; polystyrene capacitors are recommended and electrolytic capacitors are not recommended due to high leakage."
},
{
"number": "15",
"name": "GND",
"type": "power_in",
"description": "External ground; the external timing capacitors discharge to ground through this pin, and it must be hard-wired to GND."
},
{
"number": "16",
"name": "VCC",
"type": "power_in",
"description": "Positive supply pin (pin 16 = VCC on the logic diagram); the datasheet specifies VCC of 2.0 V to 6.0 V referenced to GND."
}
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"how": "pinout replaced from review decision: ray (review) (); the previous pinout came from an earlier extraction",
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"name": "DC Input Voltage",
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"name": "DC Supply Current per Supply Pin",
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"name": "DC Ground Current per Ground Pin",
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{
"name": "Storage Temperature Range",
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"kind": "absolute_maximum",
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"min": -65,
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"name": "Lead temperature",
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"typ": null,
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"name": "ESD Withstand Voltage, Human Body Model",
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"name": "ESD Withstand Voltage, Machine Model",
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"name": "ESD Withstand Voltage, Charged Device Model",
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"min": 500,
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"name": "Latchup Performance",
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"name": "Thermal resistance, junction-to-ambient",
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"name": "Power Dissipation in Still Air at 85 \u00b0C",
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"typ": null,
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"name": "DC Supply Voltage (Referenced to GND)",
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"name": "DC Input Voltage, Output Voltage (Referenced to GND)",
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{
"name": "Operating Temperature, All Package Types",
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{
"name": "Input Rise and Fall Time (A or B, Reset) max",
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"name": "Input Rise and Fall Time max",
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"source": "datasheet"
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{
"name": "Input Rise and Fall Time max",
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"conditions": "VCC = 6.0 V (Figure 6)",
"source_page": 3,
"source": "datasheet"
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{
"name": "External Timing Resistor Rx",
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"kind": "recommended_operating",
"unit": "k\u03a9",
"min": 1,
"typ": null,
"max": null,
"conditions": "VCC < 4.5 V; maximum given by footnote \u2020",
"source_page": 3,
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{
"name": "External Timing Resistor Rx",
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{
"name": "External Timing Capacitor Cx",
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"kind": "recommended_operating",
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"name": "Minimum High-Level Input Voltage",
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"conditions": "VCC = 2.0 V; Vout = 0.1 V or VCC \u2212 0.1 V; |Iout| \u2264 20 \u00b5A",
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"name": "Minimum High-Level Input Voltage",
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"conditions": "VCC = 4.5 V; Vout = 0.1 V or VCC \u2212 0.1 V; |Iout| \u2264 20 \u00b5A",
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{
"name": "Minimum High-Level Input Voltage",
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"conditions": "VCC = 6.0 V; Vout = 0.1 V or VCC \u2212 0.1 V; |Iout| \u2264 20 \u00b5A",
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{
"name": "Maximum Low-Level Input Voltage",
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"conditions": "VCC = 2.0 V; Vout = 0.1 V or VCC \u2212 0.1 V; |Iout| \u2264 20 \u00b5A",
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"name": "Maximum Low-Level Input Voltage",
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"name": "Minimum High-Level Output Voltage",
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"name": "Minimum High-Level Output Voltage",
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"name": "Minimum High-Level Output Voltage",
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