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Nexperia USA Inc. 74HCT154BQ,118
- Part No.:
- 74HCT154BQ,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
74HCT154BQ,118.pdf
- Description:
- IC DECODER/DEMUX 1X4:16 24DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,523
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Product details
Overview
74HCT154BQ,118 from Nexperia is a TTL-level-compatible 4-to-16 line decoder/demultiplexer in DHVQFN24 package, operating from 4.5 V to 5.5 V over -40 °C to +125 °C. It decodes four binary address inputs (A0–A3) into sixteen active-LOW mutually exclusive outputs (Y0–Y15), with dual active-LOW enable inputs (E0, E1) enabling 1-to-16 demultiplexing functionality. Used in industrial control I/O expansion and memory address decoding where TTL-compatible input thresholds and low-power CMOS logic are required.
For engineers reviewing the 74HCT154BQ,118 datasheet, 74HCT154BQ,118 pinout, 74HCT154BQ,118 application, or 74HCT154BQ,118 equivalent, this device is selected for high-noise-immunity address decoding in automotive body controllers, programmable logic interface modules, and legacy bus-based peripheral selection where strict TTL input compatibility and guaranteed 4.5 V minimum supply operation are mandatory.
Technical Context
The 74HCT154BQ,118 implements a combinational logic decoder with two independent active-LOW enables: both E0 and E1 must be LOW for any output to respond to address inputs. Its TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V) ensure interoperability with legacy 5 V TTL logic families without level shifting. Output drive capability is ±4 mA at VCC = 4.5 V, supporting direct connection to standard CMOS/TTL loads.
Propagation delay from address input to output is 16–53 ns (typ–max) at VCC = 4.5 V and CL = 50 pF; enable-to-output delay is 15–48 ns under identical conditions. The device features input clamp diodes allowing safe interfacing to voltages exceeding VCC when current-limiting resistors are used, and meets JESD78 Class II Level B latch-up immunity (>100 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 4-to-16 decoder / 1-to-16 demultiplexer with active-LOW outputs and dual active-LOW enables |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL systems and stable operation across industrial voltage tolerances |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - guarantees reliable recognition of standard TTL logic levels without external biasing |
| Output Drive | ±4 mA at VCC = 4.5 V - sufficient to directly drive up to 10 LSTTL loads or standard CMOS inputs |
| Propagation Delay | 16 ns typ (An→Yn), 15 ns typ (En→Yn) at VCC = 4.5 V, CL = 50 pF - supports address decoding in sub-50 MHz synchronous systems |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive and industrial motor control environments |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - robust handling during PCB assembly and field service |
Pinout & Package
DHVQFN24 (SOT815-1) package: 3.5 mm × 5.5 mm × 0.85 mm body, 24-terminal no-lead quad flat design with exposed thermal pad (non-soldered by default); optimized for high-density PCB layouts and improved thermal performance over SO24/TSSOP24 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17 | Y0 to Y15 | Active-LOW decoded outputs - only one asserted per valid address/enable combination; open-drain behavior not supported |
| 12 | GND | Ground reference for all logic and power domains; requires low-impedance PCB plane connection |
| 18, 19 | E0, E1 | Active-LOW enable inputs - both must be LOW for decoding; either HIGH forces all outputs HIGH (disabled state) |
| 20, 21, 22, 23 | A0, A1, A2, A3 | Binary address inputs - A0 = LSB; decoding follows standard binary weighting (Y0 = 0000, Y15 = 1111) |
| 24 | VCC | Positive supply - must be decoupled locally with 100 nF ceramic capacitor; thermal pad (terminal 1) is non-electrical unless connected to VCC |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V at 4.5–5.5 V supply - eliminates need for level translators when interfacing with 5 V microcontrollers or legacy logic |
| Wide temperature range | -40 °C to +125 °C operation - supports deployment in engine control units, industrial PLCs, and outdoor infrastructure equipment |
| Low dynamic power | CPD = 60 pF - enables sub-mW operation at 1 MHz toggle rate, reducing system-level thermal load |
| Input clamp diodes | Integrated protection allows safe interface to signals up to VCC + 0.5 V using series resistors - simplifies mixed-voltage board design |
| High noise immunity | Typical noise margin > 0.7 V at VCC = 4.5 V - suppresses false triggering in electrically noisy motor drive or relay control environments |
Applications
| Industrial I/O Expansion | Memory Address Decoding |
|---|---|
|
Use Scenario: Expanding GPIO count on an ARM Cortex-M4 MCU to drive 16 discrete solenoid valves in a factory automation controller. IC Role / Device Role: 4-bit address decoder mapping MCU port pins to individual valve drivers; E0/E1 tied to chip-select lines from FPGA logic. Use Value: Eliminates need for discrete logic gates or larger CPLD; reduces BOM count while maintaining deterministic timing (≤53 ns max propagation delay). |
Use Scenario: Selecting one of 16 SRAM chips in a retro-computing FPGA-based motherboard using 16-bit address bus. IC Role / Device Role: Address decoder translating upper 4 bits (A12–A15) into chip-enable signals; outputs drive OE pins of parallel SRAM devices. Use Value: Provides glitch-free, mutually exclusive chip enables with TTL-compatible inputs matching legacy 5 V address bus swing. |
| Automotive Body Control Module | Legacy Bus Peripheral Selection |
|
Use Scenario: Routing LIN bus diagnostic commands to 16 different door module sub-functions (window lift, mirror fold, lock actuation). IC Role / Device Role: Demultiplexer using E0 as data input and E1 as strobe; A0–A3 select function channel under microcontroller control. Use Value: Enables single-wire command routing with precise timing control (15 ns typ enable-to-output delay) and automotive-grade temperature resilience. |
Use Scenario: Selecting between 16 RS-232 transceivers in a multi-port serial concentrator using ISA bus address lines. IC Role / Device Role: Decoder converting ISA A0–A3 into individual transceiver enable signals; outputs interface directly to MAX232 OE pins. Use Value: Maintains full TTL logic compatibility with ISA bus signaling, avoiding level-shifter components and associated signal integrity risks. |
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 |
|---|---|---|---|
| 74HC154BQ,118 | CMOS-level inputs (VIH ≥ 3.15 V at VCC = 4.5 V); wider 2.0–6.0 V supply range | Better suited for mixed-voltage systems with 3.3 V controllers; less tolerant of marginal 5 V TTL outputs | Select when system uses 3.3 V logic or requires ultra-low ICC (<160 μA at +125 °C) |
| SN74LS154DR | Bipolar TTL technology; VIH = 2.0 V min, VIL = 0.8 V max; higher ICC (40 mA typical), slower (35 ns typ) | Higher drive strength (24 mA) but incompatible with 3.3 V logic; obsolete with limited lifecycle support | Only for legacy repair or systems requiring direct LS-family replacement with no redesign |
Compared with 74HC154BQ,118 and SN74LS154DR, the 74HCT154BQ,118 uniquely balances TTL input compatibility, low power, and extended temperature operation-making it optimal for new industrial designs where legacy interface assurance and thermal robustness are jointly critical.
Availability
74HCT154BQ,118 is available at Aetrix Electronics and suitable for industrial I/O expansion, automotive body control modules, memory address decoding, and legacy bus peripheral selection requiring stable component supply across extended temperature ranges.
Supply support for 74HCT154BQ,118 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 with focus on efficiency, reliability, and sustainability for automotive, industrial, and consumer markets.
The 74HCT154 belongs to Nexperia's industry-standard 74-series logic family, engineered specifically for seamless integration between legacy TTL systems and modern low-power CMOS designs in harsh-environment applications.
FAQ
Can 74HCT154BQ,118 operate at 3.3 V supply?
No. The 74HCT154BQ,118 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 below specification. Use 74HC154BQ,118 instead for 2.0–6.0 V operation including 3.3 V systems.
What is the function of the exposed thermal pad (terminal 1) on the DHVQFN24 package?
Terminal 1 is a non-electrical thermal pad with no electrical requirement. It may remain floating or be connected to VCC for enhanced thermal dissipation, but must never be grounded. Soldering is optional and does not affect electrical functionality.
How do the two enable inputs (E0 and E1) interact logically?
E0 and E1 are ANDed internally: both must be LOW for decoding to occur. If either is HIGH, all sixteen outputs (Y0–Y15) go HIGH regardless of address inputs. This allows hierarchical enable chaining or use of one enable as data input in demultiplexer mode.
Is 74HCT154BQ,118 pin-compatible with 74HC154BQ,118?
Yes-both share identical DHVQFN24 (SOT815-1) pinout, terminal numbering, and mechanical footprint. However, their input threshold specifications differ: 74HCT154BQ,118 accepts TTL levels, while 74HC154BQ,118 requires CMOS-level inputs. Electrical substitution requires verification of driving source compatibility.
74HCT154BQ,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-DHVQFN (5.5x3.5)
74HCT154BQ,118 FAQ
1.How can I place an order for 74HCT154BQ,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT154BQ,118 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 74HCT154BQ,118 reliable?
The price and inventory of 74HCT154BQ,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT154BQ,118 is usually 5 days.
3.What payment methods are accepted for 74HCT154BQ,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT154BQ,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT154BQ,118?
74HCT154BQ,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT154BQ,118 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 74HCT154BQ,118?
For technical support, including 74HCT154BQ,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT154BQ,118 requirements.
6.How does Aetrix verify that 74HCT154BQ,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT154BQ,118 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 74HCT154BQ,118 meets industry standards.
7.What is the process for return or replacement of 74HCT154BQ,118?
All 74HCT154BQ,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT154BQ,118, 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 74HCT154BQ,118 part is unused and in its original packaging.
Return procedure for 74HCT154BQ,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT154BQ,118 Tags
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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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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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Texas Instruments
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TCA9543APWR
Texas Instruments
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TCA9546APWR
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SN74HC138N
Texas Instruments
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