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Nexperia USA Inc. 74HCT154DB,112
- Part No.:
- 74HCT154DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT154DB,112.pdf
- Description:
- IC DECODER/DEMUX 1X4:16 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,224
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Product details
Overview
74HCT154DB,112 from Nexperia is a TTL-level 4-to-16 line decoder/demultiplexer in SO24 package, featuring active-LOW 16-channel outputs (Y0–Y15), dual active-LOW enable inputs (E0, E1), and operation across 4.5 V to 5.5 V supply. It decodes binary address inputs A0–A3 to select exactly one output per cycle, with propagation delay as low as 13 ns (VCC = 4.5 V, CL = 50 pF), and is rated for industrial temperature range (−40 °C to +125 °C). It is used in memory address decoding and I/O port expansion in microcontroller-based industrial control systems.
For engineers reviewing the 74HCT154DB,112 datasheet, 74HCT154DB,112 pinout, 74HCT154DB,112 application, or 74HCT154DB,112 equivalent, this device is selected when precise 1-of-16 selection with TTL-compatible input thresholds, low static current (<80 μA at 5.5 V), and robust latch-up immunity (>100 mA) are required in space-constrained 24-pin SOIC layouts.
Technical Context
The 74HCT154DB,112 implements combinational logic decoding using standard CMOS circuitry with TTL-input threshold compatibility (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V). Its two enable inputs operate as logical AND: both must be LOW for any output to respond to address inputs; either HIGH forces all outputs HIGH.
It functions as either a decoder (address-driven selection) or a demultiplexer (one enable used as data input, the other as strobe), with all 16 outputs asserted active-LOW. Output drive capability is ±4 mA at VCC = 4.5 V, supporting direct interface to standard logic loads without external buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures interoperability with 5 V TTL systems and stable operation under rail variation. |
| Propagation Delay | 13 ns (typ, VCC = 4.5 V, CL = 50 pF) - Enables reliable timing in high-speed address decoding up to ~30 MHz clock-equivalent systems. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees clean recognition of standard 5 V TTL logic levels without level shifting. |
| Output Drive | ±4 mA (VOH/VOL @ VCC = 4.5 V) - Sufficient to sink/source standard LS-TTL loads or drive multiple 74-series inputs. |
| Operating Temperature | −40 °C to +125 °C - Qualified for under-hood automotive ECUs and industrial motor drives with extended thermal margins. |
| Static Supply Current | 80 μA max (Tamb = −40 °C to +85 °C, VCC = 5.5 V) - Supports low-power standby modes in battery-backed systems. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - Reduces handling sensitivity and improves board-level reliability during assembly and field service. |
Pinout & Package
74HCT154DB,112 is supplied in SO24 (SOT137-1) plastic small outline package: 24-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads. Pin 1 index located at top-left corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8, 10–11, 13–17 | Y0–Y15 (except Y12) | Active-LOW decoded outputs - Each asserts LOW only when corresponding 4-bit address matches and enables are active. |
| 9 | Y12 | Active-LOW decoded output - Pin 9 is Y12 (not Y9); functional mapping confirmed per datasheet Fig. 1 and Table 2. |
| 12 | GND | Ground reference - Must be connected to system 0 V plane; decoupling capacitor recommended adjacent to pin. |
| 18–19 | E0, E1 | Active-LOW enable inputs - Both must be LOW for decoding; either HIGH disables all outputs (forces HIGH). |
| 20–23 | A0–A3 | Binary address inputs - A0 = LSB, A3 = MSB; interpreted as unsigned 4-bit code selecting one of 16 outputs. |
| 24 | VCC | Positive supply - Requires local 100 nF ceramic decoupling between pin 24 and pin 12 (GND). |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V - Eliminates need for level translators when interfacing with legacy 5 V microcontrollers or FPGAs. |
| 16-channel active-LOW decode | Exactly one Yx output goes LOW per valid address/enable combination - Enables direct connection to LED anodes or N-channel MOSFET gates without inverters. |
| Dual enable architecture | E0 and E1 both active-LOW ANDed - Allows hierarchical decoding (e.g., chip-select gating) or use as 1-to-16 demux by routing data to E0/E1. |
| High noise immunity | Typical noise margin >0.4 V at VCC = 5 V - Maintains correct output state despite coupled transients on PCB traces or shared power rails. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - Withstands transient overcurrent events without destructive latch-up in noisy industrial environments. |
Applications
| Memory Address Decoding | I/O Port Expansion |
|---|---|
Use Scenario: Selecting one of 16 SRAM or EEPROM chips in a microcontroller-based data logger with parallel bus interface. IC Role / Device Role / Timing Role: Decoder translates upper address bits (A0–A3) into individual chip-select signals, enabling only one memory device per access cycle. Use Value: Reduces MCU GPIO count by 12 pins versus discrete logic; eliminates timing skew between CS lines due to matched internal propagation paths. |
Use Scenario: Expanding GPIO count for sensor polling and actuator control in a PLC module with limited native I/O. IC Role / Device Role / Timing Role: Demultiplexer routes a single control signal (e.g., PWM enable) to one of 16 peripheral drivers based on address bus state. Use Value: Enables time-multiplexed control of 16 solenoids or relays using only 4 address lines and 1 data line, minimizing interconnect complexity. |
| LED Matrix Row Selection | Industrial Bus Arbitration |
Use Scenario: Driving rows of a 16×8 LED display in multiplexed configuration within a factory HMI panel. IC Role / Device Role / Timing Role: Active-LOW outputs directly sink current from LED row anodes via current-limiting resistors; A0–A3 scan rows sequentially. Use Value: Eliminates need for external PNP transistors or high-side switches; supports 4 mA per row at 5 V, sufficient for indicator LEDs at 2 mA typical. |
Use Scenario: Managing priority-based access to a shared CAN or RS-485 transceiver among 16 subsystems in a rail signaling controller. IC Role / Device Role / Timing Role: Decoder selects highest-priority requesting node (encoded on A0–A3) and asserts its dedicated enable line to the bus driver. Use Value: Provides deterministic, combinatorial arbitration without software overhead or clock-domain crossing delays. |
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 |
|---|---|---|---|
| 74HC154DB,112 | CMOS input thresholds (VIH = 3.15 V min at VCC = 4.5 V), wider 2.0–6.0 V supply range | Better suited for mixed-voltage systems (e.g., 3.3 V MCU controlling 5 V peripherals) but requires level-shifting from TTL sources | Select when supply flexibility or ultra-low ICC (<8 μA) at 2 V is critical; avoid if interfacing directly with 5 V TTL outputs. |
| SN74LS154N | Bipolar TTL technology; VIH = 2.0 V, VIL = 0.8 V same as 74HCT154, but higher ICC (40 mA typ), slower tpd (30 ns min), and no 125 °C rating | Limited to commercial temperature range (0 °C to 70 °C); unsuitable for under-hood or enclosed industrial enclosures | Choose only for legacy board replacements where footprint compatibility with through-hole DIP-24 is mandatory and thermal margin is not required. |
Compared with 74HC154DB,112 and SN74LS154N, the 74HCT154DB,112 uniquely balances TTL input compatibility, industrial temperature support, and low static power-making it optimal for new designs requiring robustness and interoperability in 5 V embedded systems.
Availability
74HCT154DB,112 is available at Aetrix Electronics and suitable for memory address decoding, I/O port expansion, LED matrix row selection, and industrial bus arbitration requiring stable component supply across automotive, industrial automation, and test equipment programs.
Supply support for 74HCT154DB,112 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 components for automotive, industrial, mobile, and computing applications, with leadership in logic, power, analog, and ESD protection devices.
The 74HCT154DB,112 belongs to Nexperia's 74HCT logic family, engineered specifically for seamless integration between TTL-output microcontrollers and CMOS loads while maintaining industrial-grade reliability and thermal performance.
FAQ
Can 74HCT154DB,112 operate at 3.3 V supply?
No. The 74HCT154DB,112 is specified only for 4.5 V to 5.5 V operation per its Recommended Operating Conditions table. At 3.3 V, input thresholds fall outside guaranteed recognition range (VIH min = 2.0 V, but VOH drops below 2.4 V), risking unreliable output switching and increased static current. Use 74HC154DB,112 for 3.3 V systems.
What is the maximum capacitive load each output can drive reliably?
Each Yx output is characterized up to 50 pF load capacitance in dynamic testing (Table 8). For reliable 13 ns propagation delay and <22 ns transition time at VCC = 4.5 V, total load-including PCB trace, scope probe, and downstream input capacitance-must remain ≤50 pF. Exceeding this increases delay non-linearly and may cause ringing.
How are the enable inputs used in demultiplexer mode?
In demux mode, one enable (e.g., E0) serves as the data input, while the other (E1) acts as the strobe. When E1 is held LOW, the selected Yx output follows E0's logic state. If E0 = LOW → Yx = LOW; if E0 = HIGH → Yx = HIGH. This allows serial-to-parallel distribution of a single control signal across 16 destinations.
Is pin 1 index orientation consistent across SO24 packages from Nexperia?
Yes. Per SOT137-1 package drawing (Fig. 10), pin 1 is located at the top-left corner adjacent to the package notch. On 74HCT154DB,112, this corresponds to Y0. Visual confirmation is possible via the molded dot or beveled edge on the top surface, aligned with pin 1 per JEDEC MO-118 standards.
74HCT154DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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-SSOP
74HCT154DB,112 FAQ
1.How can I place an order for 74HCT154DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT154DB,112 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 74HCT154DB,112 reliable?
The price and inventory of 74HCT154DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT154DB,112 is usually 5 days.
3.What payment methods are accepted for 74HCT154DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT154DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT154DB,112?
74HCT154DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT154DB,112 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 74HCT154DB,112?
For technical support, including 74HCT154DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT154DB,112 requirements.
6.How does Aetrix verify that 74HCT154DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT154DB,112 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 74HCT154DB,112 meets industry standards.
7.What is the process for return or replacement of 74HCT154DB,112?
All 74HCT154DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT154DB,112, 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 74HCT154DB,112 part is unused and in its original packaging.
Return procedure for 74HCT154DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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