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Nexperia USA Inc. 74HC138D,652
- Part No.:
- 74HC138D,652
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HC138D,652.pdf
- Description:
- IC DECODER/DEMUX 1 X 3:8 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,427
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Product details
Overview
74HC138D,652 from Nexperia is a 3-to-8 line inverting decoder/demultiplexer with CMOS logic, operating from 2.0 V to 6.0 V supply, featuring three active-LOW enable inputs (E1, E2) and one active-HIGH enable input (E3), eight mutually exclusive active-LOW outputs (Y0–Y7), and specified for -40 °C to +125 °C operation in SO16 package. It enables memory chip select decoding and parallel expansion to 1-of-32 decoding.
For engineers reviewing the 74HC138D,652 datasheet, 74HC138D,652 pinout, 74HC138D,652 application, or 74HC138D,652 equivalent, key selection considerations include enable input logic polarity, propagation delay at 4.5 V (15 ns typ), output drive capability (±4 mA), wide VCC range, and compatibility with both CMOS and TTL-level systems via 74HCT138 variant.
Technical Context
The 74HC138D implements combinational logic decoding of three binary address inputs (A0–A2) into eight unique active-LOW outputs, where only one output is LOW when all enables are satisfied (E1 = LOW, E2 = LOW, E3 = HIGH). Its multiple enable architecture supports cascading without external logic.
Input clamping diodes allow interface to voltages exceeding VCC using current-limiting resistors. Static characteristics include VIH = 3.15 V (min at VCC = 4.5 V) and VOL = 0.26 V (max at IO = 4.0 mA), ensuring robust noise immunity and rail-to-rail compatibility across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered designs down to 2 V. |
| Propagation Delay (An → Yn) | 15 ns typical at VCC = 4.5 V, CL = 50 pF - enables high-speed address decoding in microcontroller peripheral selection. |
| Output Drive Strength | ±4.0 mA at VCC = 4.5 V - sufficient to directly drive LED indicators or TTL inputs without buffer stages. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules and industrial control environments. |
| Input Logic Compatibility | CMOS-level inputs (VIH ≥ 3.15 V @ 4.5 V) - ensures clean switching margins in 3.3 V and 5 V digital systems. |
| Power Dissipation | 8.0 μA typical ICC at VCC = 6.0 V - ultra-low quiescent current suitable for always-on subsystems. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets IEC 61000-4-2 level 2 requirements for board-level robustness. |
Pinout & Package
74HC138D,652 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or index area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (A0, A1, A2) | Binary address inputs | Select one of eight outputs; decoded in natural binary order (A0 = LSB). |
| 4, 5 (E1, E2) | Active-LOW enable inputs | Both must be LOW for decode function; used for hierarchical enable chaining. |
| 6 (E3) | Active-HIGH enable input | Must be HIGH to activate outputs; complements E1/E2 for flexible gating logic. |
| 7, 9–15 (Y0–Y7) | Active-LOW decoded outputs | Only one output LOW per valid input combination; mutually exclusive and inverting. |
| 8 (GND) | Ground reference | 0 V return path; decoupling capacitor placement critical near this pin. |
| 16 (VCC) | Positive supply | Primary power rail; requires local 100 nF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Multiple enable architecture | Three independent enables (two active-LOW, one active-HIGH) allow modular system-level gating and seamless 1-of-32 expansion with four ICs + one inverter. |
| Demultiplexing capability | One enable input serves as data input while others act as strobes - enables 1-to-8 signal routing without additional logic. |
| Clamp diode protected inputs | Internal diodes permit safe interfacing to voltages > VCC using series resistors - eliminates need for external protection in mixed-supply designs. |
| Wide temperature qualification | Specified from -40 °C to +125 °C - validated for use in engine control units, motor drives, and industrial PLCs without derating. |
| Low dynamic power | CPD = 67 pF - enables predictable dynamic power calculation (PD = CPD × VCC² × fi × N) for thermal budgeting in dense layouts. |
Applications
| Memory Address Decoding | Peripheral Select Logic |
|---|---|
|
Use Scenario: Microcontroller-based embedded system with multiple SRAM/Flash chips requiring discrete chip-select lines. IC Role / Device Role / Timing Role: Translates 3-bit address bus into eight independent active-LOW chip-select signals for memory bank selection. Use Value: Eliminates need for discrete logic gates or FPGA resources; propagation delay <30 ns ensures timing compliance with 10 MHz address strobes. |
Use Scenario: Industrial HMI panel with eight UART peripherals (sensors, displays, actuators) sharing a single controller UART port. IC Role / Device Role / Timing Role: Functions as demultiplexer - E1/E2/E3 configured as strobe, A0–A2 as channel address, Y0–Y7 as routed TX/RX enables. Use Value: Enables time-multiplexed serial communication without software overhead; output drive strength supports direct enable of MAX3232 transceivers. |
| LED Matrix Row Driver | Programmable Logic Enable Tree |
|
Use Scenario: 8×8 LED matrix display driven by constant-current sink drivers with row-select multiplexing. IC Role / Device Role / Timing Role: Generates active-LOW row-select pulses synchronized to column data latching; outputs directly interface to PNP transistor bases or NMOS gate drivers. Use Value: Output VOL ≤ 0.26 V ensures full saturation of row transistors; low ICC (<160 μA) minimizes idle power in battery-operated displays. |
Use Scenario: Configurable test fixture for validating FPGA I/O banks, where each bank requires independent power-up sequencing and configuration enable. IC Role / Device Role / Timing Role: Provides eight independent, logically gated enable signals derived from master control register bits and system reset status. Use Value: Multiple enable inputs allow AND/OR logic synthesis at package level - e.g., E3 = !RESET, E1/E2 = CONFIG[1:0] - reducing PCB routing complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-to-8 decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT138D,653 | TTL-compatible inputs (VIH = 2.0 V min at VCC = 4.5 V); identical pinout and function. | Better suited for legacy 5 V systems with mixed TTL/CMOS logic; higher input current draw (~500 μA per input). | Select when interfacing to 74LS or 74F families; avoid in low-power or 3.3 V-only designs due to reduced noise margin. |
| SN74LS138N | Bipolar TTL process; VCC = 4.75–5.25 V only; propagation delay ~23 ns; higher ICC (~25 mA). | Requires strict 5 V supply; not usable below 4.75 V or above 5.25 V; incompatible with 3.3 V logic without level shifters. | Choose only for drop-in replacement in existing LS-based designs; unsuitable for modern mixed-voltage or low-power systems. |
Compared with 74HC138D,652, the 74HCT138D,653 offers TTL input compatibility at the cost of higher static current, while SN74LS138N provides legacy bipolar performance but lacks voltage flexibility and power efficiency - making the HC variant optimal for new designs requiring wide VCC range and low ICC.
Availability
74HC138D,652 is available at Aetrix Electronics and suitable for memory address decoding, peripheral select logic, LED matrix row driving, and programmable logic enable tree applications requiring stable component supply across automotive, industrial, and embedded markets.
Supply support for 74HC138D,652 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 global semiconductor expert delivering high-performance, reliable logic, analog, and discrete components optimized for efficiency and miniaturization in mass-market electronics.
The 74HC138 belongs to Nexperia's high-speed CMOS logic family, designed specifically for low-power, high-noise-immunity address decoding and signal routing in resource-constrained embedded systems and industrial controllers.
FAQ
Can 74HC138D,652 operate reliably at 3.3 V supply?
Yes. The 74HC138D,652 is fully specified from 2.0 V to 6.0 V, with VIH = 2.4 V (min) and VIL = 1.35 V (max) at VCC = 3.3 V per datasheet Table 6. Propagation delay is 22 ns (max) and output drive remains ±4 mA, making it ideal for 3.3 V microcontroller interfaces without level translation.
What is the maximum clock frequency supported for demultiplexing mode?
The device has no internal clock; its maximum effective switching rate is governed by propagation delay and transition time. With tpd = 15 ns (typ) and tt = 7 ns (typ) at VCC = 4.5 V, it supports input address changes up to ~30 MHz in burst mode, assuming proper PCB layout and load capacitance ≤50 pF.
Are the Y0–Y7 outputs truly mutually exclusive under all valid enable conditions?
Yes. Per the function table (Table 3), when E1 = LOW, E2 = LOW, and E3 = HIGH, exactly one output (Y0–Y7) is LOW based on A2A1A0; all others remain HIGH. No glitch or overlap occurs during address transitions due to synchronous combinatorial design - verified across -40 °C to +125 °C.
Does the SO16 package (SOT109-1) support reflow soldering per JEDEC J-STD-020?
Yes. The SOT109-1 package is rated for standard Pb-free reflow profiles, with peak temperature up to 260 °C for ≤30 seconds. Moisture sensitivity level is MSL3, requiring bake-out if exposed to ambient >60% RH for >168 hours prior to assembly.
74HC138D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74HC138D,652 FAQ
1.How can I place an order for 74HC138D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC138D,652 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 74HC138D,652 reliable?
The price and inventory of 74HC138D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC138D,652 is usually 5 days.
3.What payment methods are accepted for 74HC138D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC138D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC138D,652?
74HC138D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC138D,652 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 74HC138D,652?
For technical support, including 74HC138D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC138D,652 requirements.
6.How does Aetrix verify that 74HC138D,652 is sourced from the original manufacturer or authorized distributors?
All 74HC138D,652 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 74HC138D,652 meets industry standards.
7.What is the process for return or replacement of 74HC138D,652?
All 74HC138D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC138D,652, 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 74HC138D,652 part is unused and in its original packaging.
Return procedure for 74HC138D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC138D,652 Tags
-
SN74HC138DR
Texas Instruments
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TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
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74CBTLV3257PW,118
Nexperia USA Inc.
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SN74CBTLV3257PWR
Texas Instruments
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74CBTLV3257GUX
Nexperia USA Inc.
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74HC154BQ,118
Nexperia USA Inc.
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P3S0200GMX
NXP USA Inc.
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SN74CB3Q3245PWR
Texas Instruments
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SN74CB3Q3257RGYR
Texas Instruments
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TCA9543APWR
Texas Instruments
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TCA9546APWR
Texas Instruments
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SN74HC138N
Texas Instruments
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