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Nexperia USA Inc. 74HCT154D,652
- Part No.:
- 74HCT154D,652
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HCT154D,652.pdf
- Description:
- IC DECODER/DEMUX 1X4:16 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,897
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Product details
Overview
74HCT154D,652 from Nexperia is a TTL-level-compatible 4-to-16 line decoder/demultiplexer in SO24 package, operating from 4.5 V to 5.5 V with propagation delay as low as 13 ns (VCC = 4.5 V), active-low 16-channel outputs (Y0–Y15), and dual active-low enable inputs (E0, E1). It serves as a core address decoder in microcontroller peripheral expansion and memory-mapped I/O systems.
For engineers reviewing the 74HCT154D,652 datasheet, 74HCT154D,652 pinout, 74HCT154D,652 application, or 74HCT154D,652 equivalent, key selection criteria include TTL input compatibility, -40 °C to +125 °C industrial temperature range, SO24 thermal performance, and demultiplexing capability with enable-controlled data routing.
Technical Context
This device implements a binary-decoded logic function where four address inputs (A0–A3) select exactly one of sixteen complementary outputs (Y0–Y15), all active LOW. Both enable inputs (E0, E1) must be LOW for decoding to occur - any HIGH forces all outputs HIGH.
It operates as a 1-to-16 demultiplexer when one enable pin (e.g., E0) accepts data while the other (E1) acts as strobe control. Input clamp diodes support interfacing to voltages exceeding VCC using current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures direct compatibility with 5 V TTL logic families without level shifting. |
| Propagation delay | 13 ns (typ, VCC = 4.5 V) - enables reliable operation in high-speed address decoding up to ~30 MHz system clocks. |
| Output drive | ±4 mA (VCC = 4.5 V) - sufficient to directly drive multiple 74-series inputs or small LED loads via pull-up. |
| Input threshold | VIH = 2.0 V (min), VIL = 0.8 V (max) - guarantees robust recognition of standard TTL logic levels. |
| Operating temperature | -40 °C to +125 °C - supports deployment in automotive under-hood, industrial PLC, and motor control environments. |
| Power dissipation | Max 500 mW (SO24, Tamb ≤ 119 °C) - requires no external heatsink in typical PCB layouts with moderate airflow. |
Pinout & Package
74HCT154D,652 uses the SOT137-1 plastic small outline package (SO24), 24-pin, 7.5 mm body width, with gull-wing leads and standard JEDEC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8, 9–11, 13–17 | Y0–Y15 (outputs) | Active-LOW decoded outputs; only one asserted per valid address/enable combination. |
| 12 | GND | Reference ground for all logic and power domains; must be low-impedance connection. |
| 18, 19 | E0, E1 | Active-LOW enable inputs; both must be LOW for decoding; used jointly for gating or separately for demux data path. |
| 20–23 | A0–A3 | Binary address inputs; A0 = LSB, A3 = MSB; determine which Yn output is activated. |
| 24 | VCC | Positive supply rail (4.5–5.5 V); decoupling capacitor (100 nF) required within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Meets 74LS logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), enabling direct interface with legacy 5 V microcontrollers and FPGAs. |
| Demultiplexing mode | One enable pin functions as data input; selected output mirrors its state - eliminates need for external AND gates in channel routing. |
| Clamp diode protection | Integrated input diodes allow safe interfacing to signals up to VCC + 0.5 V using series resistors - simplifies mixed-voltage board design. |
| High noise immunity | CMOS input structure with hysteresis-free but >400 mV noise margin at VCC = 5 V ensures stable operation in electrically noisy industrial enclosures. |
| Latch-up immunity | Exceeds JESD78 Class II Level B (100 mA), preventing destructive latch-up during transient overvoltage events on I/O lines. |
Applications
| Microcontroller Peripheral Expansion | Memory-Mapped I/O Decoding |
|---|---|
|
Use Scenario: Expanding GPIO count of an 8-bit MCU (e.g., ATmega328P) to drive 16 discrete peripherals (relays, sensors, displays). IC Role / Device Role / Timing Role: Address decoder mapping A0–A3 and chip-select signals to activate individual peripheral CS lines on rising edge of E1 strobe. Use Value: Reduces firmware overhead by eliminating bit-banged address decoding; enables parallel access to 16 devices with single write to port register. |
Use Scenario: Selecting among 16 I/O registers in a custom ASIC or FPGA-based controller with memory-mapped register space. IC Role / Device Role / Timing Role: Translates upper address bits into dedicated register enable signals synchronized to bus clock and RD/WR strobes. Use Value: Provides deterministic, zero-latency register selection without consuming FPGA LUTs or MCU cycles for address comparison logic. |
| Industrial Sensor Multiplexing | LED Matrix Row Selection |
|
Use Scenario: Scanning 16 analog sensor channels (e.g., thermocouples, RTDs) using a single ADC with shared signal conditioning path. IC Role / Device Role / Timing Role: Demultiplexer routing sensor outputs to common amplifier/ADC input; E0 carries conditioned analog signal, E1 controls channel selection. Use Value: Eliminates 16-channel analog MUX IC; leverages digital decoder's fast settling and low crosstalk (< 0.1 %) for precision measurements. |
Use Scenario: Driving rows of a 16×8 LED matrix in multiplexed display systems (e.g., industrial HMI panels). IC Role / Device Role / Timing Role: Row decoder asserting one active-LOW row line per A0–A3 cycle; column drivers sink current synchronously. Use Value: Enables uniform brightness control across all rows via precise timing alignment (tpd ≤ 16 ns ensures < 10 ns skew between rows). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-to-16 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC154D,652 | CMOS-level inputs (VIH = 3.15 V min @ VCC = 4.5 V); wider 2.0–6.0 V supply range. | Better suited for mixed-supply systems (e.g., 3.3 V MCU controlling 5 V peripherals) due to higher noise margin and rail flexibility. | Select when interfacing with 3.3 V or variable-VCC logic; avoid if driving legacy TTL loads requiring guaranteed 2.0 V VIH. |
| SN74LS154N | Bipolar TTL technology; VIH = 2.0 V min, VIL = 0.8 V max; higher ICC (30 mA typ), slower tpd (~30 ns). | Compatible with vintage 74LS systems but incompatible with CMOS leakage-sensitive designs; requires stronger drive capability. | Choose only for backward compatibility with existing LS-based boards; not recommended for new designs due to power and speed limitations. |
Compared with 74HC154D,652 and SN74LS154N, the 74HCT154D,652 uniquely balances TTL input compatibility, 5 V CMOS output drive, and sub-15 ns propagation - making it optimal for upgrading legacy TTL systems while retaining modern power efficiency.
Availability
74HCT154D,652 is available at Aetrix Electronics and suitable for microcontroller peripheral expansion, memory-mapped I/O decoding, and industrial sensor multiplexing requiring stable component supply across extended temperature ranges.
Supply support for 74HCT154D,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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.
The 74HCT154 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically for seamless integration between TTL-compatible control logic and CMOS-based system-on-chip or microcontroller platforms.
FAQ
Can 74HCT154D,652 operate at 3.3 V supply?
No. The 74HCT154 variant is specified only for 4.5 V to 5.5 V operation per its recommended conditions. At 3.3 V, input thresholds fall outside TTL compatibility range and output drive degrades significantly. Use 74HC154D,652 instead for 2.0–6.0 V flexibility including 3.3 V systems.
What happens when both E0 and E1 are HIGH?
When either E0 or E1 is HIGH, all 16 outputs (Y0–Y15) are forced HIGH regardless of A0–A3 states. This is a defined disable state per the function table - no contention or undefined behavior occurs, and outputs remain in high-impedance-equivalent OFF state.
Is the SO24 package RoHS compliant and lead-free?
Yes. The SOT137-1 package used in 74HCT154D,652 is RoHS-compliant and lead-free, meeting EU Directive 2011/65/EU and JEDEC J-STD-609A Class 3 marking requirements. Terminal finish is matte tin (Sn), with no lead content above 0.1 wt%.
How does the device handle floating address inputs?
Unconnected address inputs (A0–A3) are not internally pulled - they float to indeterminate logic levels, causing unpredictable output selection. External pull-up or pull-down resistors (10–100 kΩ) are mandatory for unused or un-driven address lines to ensure deterministic decode behavior.
74HCT154D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 4:16
- Independent Circuits:
- 1
- Current - Output High, Low:
- 4mA, 4mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SO
74HCT154D,652 FAQ
1.How can I place an order for 74HCT154D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT154D,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 74HCT154D,652 reliable?
The price and inventory of 74HCT154D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT154D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT154D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT154D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT154D,652?
74HCT154D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT154D,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 74HCT154D,652?
For technical support, including 74HCT154D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT154D,652 requirements.
6.How does Aetrix verify that 74HCT154D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT154D,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 74HCT154D,652 meets industry standards.
7.What is the process for return or replacement of 74HCT154D,652?
All 74HCT154D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT154D,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 74HCT154D,652 part is unused and in its original packaging.
Return procedure for 74HCT154D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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