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Nexperia USA Inc. 74HC238PW-Q100J
- Part No.:
- 74HC238PW-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HC238PW-Q100J.pdf
- Description:
- IC DECODER/DEMUX 1X3:8 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,437
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Product details
Overview
74HC238PW-Q100 from Nexperia is an automotive-qualified 3-to-8 line decoder/demultiplexer with three binary address inputs (A0–A2), eight active-HIGH mutually exclusive outputs (Y0–Y7), and three enable inputs (E1, E2 = active LOW; E3 = active HIGH), operating from 2.0 V to 6.0 V supply and qualified per AEC-Q100 Grade 1 for use in engine control units and body electronics.
For engineers reviewing the 74HC238PW-Q100 datasheet, 74HC238PW-Q100 pinout, 74HC238PW-Q100 application, or 74HC238PW-Q100 equivalent, key selection criteria include propagation delay at 4.5 V (17 ns typ), TSSOP16 package compatibility with AOI-capable assembly, CMOS-level input thresholds, and support for parallel expansion to 1-of-32 decoding using four ICs and one inverter.
Technical Context
The device implements a combinational logic decoder with fully decoded 3-bit binary input mapping to eight independent outputs, where output activation requires simultaneous assertion of E1 = LOW, E2 = LOW, and E3 = HIGH. Its enable architecture supports cascading without external gating logic.
Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors, and the design complies with JEDEC standard no. 7A for logic families. It operates across -40 °C to +125 °C with static VIH/VIL thresholds defined for both 2.0 V and 4.5 V VCC conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 3-to-8 line decoder / 1-to-8 demultiplexer with triple enable control |
| Supply voltage range | 2.0 V to 6.0 V - supports wide-rail automotive power domains including 3.3 V and 5 V systems |
| Propagation delay (A0→Y0, VCC = 4.5 V) | 17 ns typical - enables timing-critical address decoding in microcontroller peripheral selection |
| Output drive (VOH @ 4.5 V) | 3.98 V min at -4.0 mA - ensures robust HIGH-level signaling into TTL or CMOS loads |
| Input threshold (VIH, VCC = 4.5 V) | 3.15 V min - compatible with CMOS logic levels and immune to noise near VCC/2 |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood automotive environments per AEC-Q100 Grade 1 |
| ESD protection | HBM >2000 V, CDM >1000 V - meets stringent automotive board-level reliability requirements |
Pinout & Package
TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-lead, body width 4.4 mm, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | Address input | LSB of 3-bit binary address; determines output Y0–Y7 mapping |
| 2 (A1) | Address input | Mid-bit of 3-bit binary address; contributes to output selection |
| 3 (A2) | Address input | MSB of 3-bit binary address; completes 3-bit decode word |
| 4 (E1) | Enable input | Active-LOW global enable; must be LOW for any output activation |
| 5 (E2) | Enable input | Second active-LOW enable; both E1 and E2 must be LOW |
| 6 (E3) | Enable input | Active-HIGH enable; all three enables required for output assertion |
| 7 (Y7) | Output | Active-HIGH decoded output corresponding to A2A1A0 = 111 |
| 8 (GND) | Ground | Reference node for all input/output signals and internal logic |
| 9 (Y6) | Output | Active-HIGH decoded output corresponding to A2A1A0 = 110 |
| 10 (Y5) | Output | Active-HIGH decoded output corresponding to A2A1A0 = 101 |
| 11 (Y4) | Output | Active-HIGH decoded output corresponding to A2A1A0 = 100 |
| 12 (Y3) | Output | Active-HIGH decoded output corresponding to A2A1A0 = 011 |
| 13 (Y2) | Output | Active-HIGH decoded output corresponding to A2A1A0 = 010 |
| 14 (Y1) | Output | Active-HIGH decoded output corresponding to A2A1A0 = 001 |
| 15 (Y0) | Output | Active-HIGH decoded output corresponding to A2A1A0 = 000 |
| 16 (VCC) | Supply voltage | Positive supply rail; powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications requiring operation from -40 °C to +125 °C ambient |
| Triple enable architecture | Enables hierarchical decoding and seamless 1-of-32 expansion using four '238 ICs and one inverter |
| CMOS input compatibility | Supports direct interface with microcontroller GPIOs and other HC/HCT logic without level shifting |
| Clamp diode protected inputs | Allows safe connection to signals exceeding VCC when used with series current-limiting resistors |
| TSSOP16 with side-wettable flanks | Enables automated optical inspection (AOI) of solder joints for high-reliability automotive PCB assembly |
Applications
| Engine Control Unit (ECU) Memory Select | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Decoding microcontroller address lines to select among multiple EEPROM, flash, or sensor register banks in an ECU. IC Role / Device Role / Timing Role: Address decoder providing mutually exclusive chip-select signals with sub-20 ns propagation delay at 4.5 V. Use Value: Eliminates need for discrete logic or FPGA resources while maintaining deterministic timing for critical firmware boot sequences. | Use Scenario: Routing CAN/LIN controller outputs to individual lighting drivers, window motor controllers, or door lock actuators. IC Role / Device Role / Timing Role: Demultiplexer converting serial command data into parallel actuator enable signals. Use Value: Reduces MCU GPIO count by 8:1 while preserving real-time response via fixed, predictable propagation delay. |
| ADAS Camera Sensor Interface | Automotive Infotainment Display Subsystem |
Use Scenario: Selecting between multiple image sensor configuration registers or analog front-end channels in a surround-view camera system. IC Role / Device Role / Timing Role: Decoder enabling fast switching between sensor modes during dynamic scene adaptation. Use Value: Supports <50 ns total path delay (address + decode + setup) required for frame-synchronized multi-sensor arbitration. | Use Scenario: Managing backlight dimming ICs, touch controller interfaces, and display memory mapping in head-unit displays. IC Role / Device Role / Timing Role: Output expander providing isolated enable control for mixed-voltage peripherals. Use Value: Enables single MCU port to manage up to eight display subsystem components with minimal firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-to-8 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT238PW-Q100 | TTL-compatible inputs (VIH = 2.0 V min at 4.5 V); otherwise identical pinout, timing, and packaging | Better suited for legacy 5 V systems with mixed TTL/CMOS logic; higher input current draw on E3 | Select when interfacing directly to 5 V TTL outputs or when VIH margin below 3.15 V is required |
| SN74HC238PWR | Industrial-grade (not AEC-Q100 qualified); same TSSOP16 package but rated only to +85 °C | Limited to cabin/non-under-hood automotive modules or industrial control panels | Choose only if AEC-Q100 qualification is not mandated and cost sensitivity outweighs long-term reliability needs |
Compared with 74HCT238PW-Q100, the 74HC238PW-Q100 offers tighter VIH/VIL margins for modern low-VCC MCUs, while SN74HC238PWR trades automotive qualification for lower unit cost in non-critical thermal environments.
Availability
74HC238PW-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera interfaces, and infotainment display subsystems requiring stable component supply across extended automotive temperature ranges.
Supply support for 74HC238PW-Q100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with core expertise in automotive-qualified standard logic solutions.
The 74HC238-Q100 belongs to Nexperia's automotive logic family, designed specifically to meet AEC-Q100 Grade 1 requirements for under-hood and safety-critical vehicle subsystems while maintaining pin-for-pin compatibility with industry-standard HC logic.
FAQ
What is the maximum clock frequency supported by the 74HC238PW-Q100?
The 74HC238PW-Q100 is a combinational logic device with no internal clock; its usable signal rate depends on propagation delay and system timing margins. At VCC = 4.5 V, tpd is 17 ns typical, supporting address/data strobe rates up to ~30 MHz in well-designed PCB layouts with controlled trace lengths and proper decoupling.
Can the 74HC238PW-Q100 be used as a demultiplexer?
Yes - by using one active-LOW enable input (E1 or E2) as the data input and the remaining enables as strobes, the device functions as an 8-output demultiplexer. For example, driving E1 with data and holding E2 = LOW, E3 = HIGH allows Y0–Y7 to mirror the state of A0–A2 under data control.
Does the 74HC238PW-Q100 support mixed-voltage operation between inputs and outputs?
No - all inputs and outputs operate referenced to the same VCC rail (2.0 V to 6.0 V). The device does not support I/O voltage translation; inputs exceeding VCC require external current-limiting resistors due to integrated clamp diodes, but output swing remains bounded by VCC and GND.
Is the exposed pad on the TSSOP16 package electrically connected?
No - the exposed thermal pad on the SOT403-1 (TSSOP16) package is not electrically connected to any internal node. Per Nexperia documentation, it may remain floating or be connected to GND for thermal enhancement, but no electrical requirement exists for soldering it.
74HC238PW-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 3:8
- Independent Circuits:
- 1
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74HC238PW-Q100J FAQ
1.How can I place an order for 74HC238PW-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC238PW-Q100J on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74HC238PW-Q100J reliable?
The price and inventory of 74HC238PW-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC238PW-Q100J is usually 5 days.
3.What payment methods are accepted for 74HC238PW-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC238PW-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC238PW-Q100J?
74HC238PW-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC238PW-Q100J order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74HC238PW-Q100J?
For technical support, including 74HC238PW-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC238PW-Q100J requirements.
6.How does Aetrix verify that 74HC238PW-Q100J is sourced from the original manufacturer or authorized distributors?
All 74HC238PW-Q100J products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HC238PW-Q100J meets industry standards.
7.What is the process for return or replacement of 74HC238PW-Q100J?
All 74HC238PW-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HC238PW-Q100J, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74HC238PW-Q100J part is unused and in its original packaging.
Return procedure for 74HC238PW-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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