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CD74HCT238PWR
Public Made by Adomby adom
Texas Instruments Logic ICs, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCD74HCT238PWR
Texas Instruments · Logic ICs · TSSOP-16
CD74HCT238PWR from Texas Instruments, 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 | A0 | input | Address select 0 input, one of three binary address inputs that selects which of outputs Y0 to Y7 is active. |
| 2 | A1 | input | Address select 1 input, one of three binary address inputs that selects which of outputs Y0 to Y7 is active. |
| 3 | A2 | input | Address select 2 input, one of three binary address inputs that selects which of outputs Y0 to Y7 is active. |
| 4 | G0 | input | Output strobe 0, active-low enable input; when gated, all outputs are forced to the inactive state. |
| 5 | G1 | input | Output strobe 1, active-low enable input; when gated, all outputs are forced to the inactive state. |
| 6 | G2 | input | Output strobe 2, the standard (non-inverted) output strobe input that together with G0 and G1 gates the outputs. |
| 7 | Y7 | output | Decoder output 7, active high for the HCT238 and driven to the inactive (low) level when the outputs are disabled by the strobes. |
| 8 | GND | power_in | Ground reference for the device. |
| 9 | Y6 | output | Decoder output 6, active high for the HCT238 and driven to the inactive (low) level when the outputs are disabled by the strobes. |
| 10 | Y5 | output | Decoder output 5, active high for the HCT238 and driven to the inactive (low) level when the outputs are disabled by the strobes. |
| 11 | Y4 | output | Decoder output 4, active high for the HCT238 and driven to the inactive (low) level when the outputs are disabled by the strobes. |
| 12 | Y3 | output | Decoder output 3, active high for the HCT238 and driven to the inactive (low) level when the outputs are disabled by the strobes. |
| 13 | Y2 | output | Decoder output 2, active high for the HCT238 and driven to the inactive (low) level when the outputs are disabled by the strobes. |
| 14 | Y1 | output | Decoder output 1, active high for the HCT238 and driven to the inactive (low) level when the outputs are disabled by the strobes. |
| 15 | Y0 | output | Decoder output 0, active high for the HCT238 and driven to the inactive (low) level when the outputs are disabled by the strobes. |
| 16 | VCC | power_in | Positive supply pin for the device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Logic ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| High-level input voltage | VIH | 2 | V | VCC 4.5 to 5.5 V; 25°C | 5 | ||
| Low-level input voltage | VIL | 0.8 | V | VCC 4.5 to 5.5 V; 25°C | 5 | ||
| High-level output voltage | VOH | 4.4 | V | IOH = -20 μA; VCC 4.5 V; 25°C | 5 | ||
| High-level output voltage | VOH | 3.98 | V | IOH = -4 mA; VCC 4.5 V; 25°C | 5 | ||
| High-level output voltage | VOH | 3.84 | V | IOH = -4 mA; VCC 4.5 V; -40°C to 85°C | 5 | ||
| High-level output voltage | VOH | 3.7 | V | IOH = -4 mA; VCC 4.5 V; -55°C to 125°C | 5 | ||
| Low-level output voltage | VOL | 0.1 | V | IOL = 20 μA; VCC 4.5 V; 25°C | 5 | ||
| Low-level output voltage | VOL | 0.26 | V | IOH = 4 mA (as printed); VCC 4.5 V; 25°C | 5 | ||
| Low-level output voltage | VOL | 0.33 | V | IOH = 4 mA (as printed); VCC 4.5 V; -40°C to 85°C | 5 | ||
| Low-level output voltage | VOL | 0.4 | V | IOH = 4 mA (as printed); VCC 4.5 V; -55°C to 125°C | 5 | ||
| Input leakage current | II | -0.1 | 0.1 | µA | VI = VCC and GND; VCC 5.5 V; 25°C | 5 | |
| Input leakage current | II | -1 | 1 | µA | VI = VCC and GND; VCC 5.5 V; -40°C to 85°C | 5 | |
| Supply current | ICC | 8 | µA | VI = VCC and GND; VCC 5.5 V; 25°C | 5 | ||
| Supply current | ICC | 80 | µA | VI = VCC and GND; VCC 5.5 V; -40°C to 85°C | 5 | ||
| Supply current | ICC | 160 | µA | VI = VCC and GND; VCC 5.5 V; -55°C to 125°C | 5 | ||
| Additional supply current per input pin, A0 - A2 inputs | ∆ICC | 100 | 540 | µA | A0 - A2 inputs held at VCC, 2.1 V; VCC 4.5 to 5.5 V; 25°C | 5 | |
| Additional supply current per input pin, A0 - A2 inputs | ∆ICC | 675 | µA | A0 - A2 inputs held at VCC, 2.1 V; VCC 4.5 to 5.5 V; -40°C to 85°C | 5 | ||
| Additional supply current per input pin, A0 - A2 inputs | ∆ICC | 735 | µA | A0 - A2 inputs held at VCC, 2.1 V; VCC 4.5 to 5.5 V; -55°C to 125°C | 5 | ||
| Additional supply current per input pin, G0 and G1 inputs | ∆ICC | 100 | 450 | µA | G 0 and G 1 inputs held at VCC, 2.1 V; VCC 4.5 to 5.5 V; 25°C | 5 | |
| Additional supply current per input pin, G0 and G1 inputs | ∆ICC | 562.5 | µA | G 0 and G 1 inputs held at VCC, 2.1 V; VCC 4.5 to 5.5 V; -40°C to 85°C | 5 | ||
| Additional supply current per input pin, G0 and G1 inputs | ∆ICC | 612.5 | µA | G 0 and G 1 inputs held at VCC, 2.1 V; VCC 4.5 to 5.5 V; -55°C to 125°C | 5 | ||
| Additional supply current per input pin, G2 input | ∆ICC | 100 | 360 | µA | G2 input held at VCC, 2.1 V; VCC 4.5 to 5.5 V; 25°C | 5 | |
| Additional supply current per input pin, G2 input | ∆ICC | 450 | µA | G2 input held at VCC, 2.1 V; VCC 4.5 to 5.5 V; -40°C to 85°C | 5 | ||
| Additional supply current per input pin, G2 input | ∆ICC | 490 | µA | G2 input held at VCC, 2.1 V; VCC 4.5 to 5.5 V; -55°C to 125°C | 5 | ||
| Propagation delay, address to output | tpd | 14 | 35 | ns | CL = 50pF; VCC 4.5 V; 25°C | 6 | |
| Propagation delay, address to output | tpd | 44 | ns | CL = 50pF; VCC 4.5 V; -40°C to 85°C | 6 | ||
| Propagation delay, address to output | tpd | 53 | ns | CL = 50pF; VCC 4.5 V; -55°C to 125°C | 6 | ||
| Propagation delay, strobe G0, G1 to output (HCT238) | tpd | 40 | ns | CL = 15pF; VCC 4.5 V; 25°C | 6 | ||
| Propagation delay, strobe G0, G1 to output (HCT238) | tpd | 50 | ns | CL = 15pF; VCC 4.5 V; -40°C to 85°C | 6 | ||
| Propagation delay, strobe G0, G1 to output (HCT238) | tpd | 60 | ns | CL = 15pF; VCC 4.5 V; -55°C to 125°C | 6 | ||
| Output transition time | tt | 15 | CL = 15pF; VCC 4.5 V; 25°C | 6 | |||
| Output transition time | tt | 19 | CL = 15pF; VCC 4.5 V; -40°C to 85°C | 6 | |||
| Output transition time | tt | 22 | CL = 15pF; VCC 4.5 V; -55°C to 125°C | 6 | |||
| Supply voltage range (HCT types) | VCC | 4.5 | 5.5 | V | HCT types | 4 | |
| Input voltage | VI | 0 | V | Maximum equals VCC | 4 | ||
| Output voltage | VO | 0 | V | Maximum equals VCC | 4 | ||
| Input rise and fall time | tt | 500 | ns | VCC = 4.5 V | 4 | ||
| Operating free-air temperature range | TA | -55 | 125 | °C | 4 | ||
| Supply voltage | VCC | -0.5 | 7 | V | 4 | ||
| Input clamp diode current | IIK | -20 | 20 | mA | For VI < -0.5 V or VI > VCC + 0.5 V | 4 | |
| Output clamp diode current | IOK | -20 | 20 | mA | For VO < -0.5 V or VO > VCC + 0.5 V | 4 | |
| Output source or sink current per output pin | IO | -25 | 25 | mA | For VO > -0.5 V or VO < VCC + 0.5 V | 4 | |
| Continuous current through VCC or GND | -50 | 50 | mA | 4 | |||
| Junction temperature | TJ | 150 | °C | 4 | |||
| Storage temperature range | Tstg | -65 | 150 | °C | 4 | ||
| Junction-to-ambient thermal resistance | RθJA | 108 | °C/W | PW (TSSOP) package, 16 pins | 4 |
CAD (KiCad official)
- Symbol:
CD74HCT238PWR - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
cd74hct238pwr-etched.step/cd74hct238pwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cd74hct238pwr.step/cd74hct238pwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (29 pp, sha256
2d2ba82e9f179699, retrieved 2026-10-18, tier: manufacturer) - 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).