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Nexperia USA Inc. 74HCT257PW,118
- Part No.:
- 74HCT257PW,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT257PW,118.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,259
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Product details
Overview
74HCT257PW,118 from Nexperia is a quad 2-input multiplexer with 3-state outputs, designed for bus-oriented data routing in digital logic systems. It operates at 4.5 V to 5.5 V, supports TTL-level inputs, delivers propagation delay as low as 13 ns (VCC = 4.5 V), and functions across -40 °C to +125 °C - enabling use in industrial control backplanes and embedded I/O expansion modules.
For engineers reviewing the 74HCT257PW,118 datasheet, 74HCT257PW,118 pinout, 74HCT257PW,118 application, or 74HCT257PW,118 equivalent, key selection criteria include its 3-state output compatibility with shared data buses, TTL input threshold compliance (VIH ≥ 2.0 V), guaranteed high-impedance isolation during disable (IOZ ≤ ±10 μA), and TSSOP16 package suitability for space-constrained PCB layouts.
Technical Context
The device implements four independent 2:1 multiplexers sharing a common select line (S) and a single active-low 3-state output enable (OE). Each multiplexer routes either I0 or I1 to its Y output based on S state, with all outputs placed in high-impedance mode when OE is HIGH.
Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.0 V) ensure direct interfacing with legacy 5 V logic families, while CMOS output drive (VOH ≥ 3.7 V at IO = −6 mA, VOL ≤ 0.4 V at IO = 6 mA) maintains noise margins on loaded buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures interoperability with standard 5 V TTL and mixed-voltage systems |
| Propagation delay (tpd) | 13 ns typ (VCC = 4.5 V, CL = 15 pF) - enables reliable operation up to ~30 MHz clocked data routing |
| Input threshold (VIH/VIL) | 2.0 V / 0.8 V min/max - guarantees recognition of standard TTL logic levels without level-shifting |
| Output drive (VOH/VOL) | ≥3.7 V / ≤0.4 V at ±6 mA - sustains valid logic levels under typical bus loading conditions |
| 3-state leakage (IOZ) | ±10 μA max (−40 °C to +125 °C) - prevents signal contention during output disable |
| Operating temperature | −40 °C to +125 °C - qualified for extended industrial and under-hood embedded environments |
| Power dissipation capacitance | 45 pF per multiplexer - used to calculate dynamic power (PD = CPD × VCC² × fi × N) |
Pinout & Package
TSSOP16 plastic thin shrink small outline package (SOT403-1); 16-pin, 4.4 mm body width, 0.65 mm lead pitch; suitable for automated SMT assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Common data select input | Single control line determining whether I0 or I1 is routed to each Y output |
| 2,5,11,14 (1I0–4I0) | Data input source 0 | Four independent inputs selected when S = LOW |
| 3,6,10,13 (1I1–4I1) | Data input source 1 | Four independent inputs selected when S = HIGH |
| 4,7,9,12 (1Y–4Y) | 3-state multiplexer output | Outputs go high-impedance when OE = HIGH; otherwise pass selected input |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and I/O circuits |
| 15 (OE) | Active-low output enable | Drives all Y outputs to high-Z when HIGH; enables normal operation when LOW |
| 16 (VCC) | Supply voltage | Primary power rail for logic core and output drivers (4.5–5.5 V) |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5.0 V - eliminates need for external level translators when interfacing with 5 V microcontrollers or legacy peripherals |
| 3-state bus interface | IOZ ≤ ±10 μA over full temp range - ensures clean bus release and prevents contention in multi-driver systems |
| Wide temperature operation | −40 °C to +125 °C - supports deployment in motor drives, PLC I/O modules, and automotive non-safety ECUs |
| Low dynamic power | CPD = 45 pF per multiplexer - reduces switching power in high-frequency data routing applications |
| ESD robustness | HBM > 2000 V, CDM > 1000 V - enhances manufacturing yield and field reliability in handling-sensitive environments |
Applications
| Industrial PLC Backplane | Embedded Microcontroller I/O Expansion |
|---|---|
Use Scenario: Routing sensor data from multiple analog front-ends to a single ADC channel via shared bus architecture. IC Role / Device Role / Timing Role: Quad 2:1 mux selects one of two differential inputs per channel under microcontroller GPIO control; 3-state outputs isolate unused channels. Use Value: Reduces PCB layer count by consolidating four independent 2:1 paths into one TSSOP16 IC, minimizing trace crosstalk and layout area. | Use Scenario: Expanding limited GPIO count on an ARM Cortex-M0+ MCU to drive eight discrete LED indicators. IC Role / Device Role / Timing Role: Multiplexer acts as static I/O selector - S and OE pins configured at startup to route fixed I/O assignments to LED drivers. Use Value: Enables deterministic, glitch-free LED control using only three MCU pins (S, OE, and four shared data lines), avoiding software bit-banging overhead. |
| Legacy System Bus Interface | Digital Test Equipment Signal Routing |
Use Scenario: Interfacing modern FPGA-based logic analyzers with vintage 5 V TTL test fixtures requiring strict voltage-level compliance. IC Role / Device Role / Timing Role: Acts as bidirectional bus buffer/mux - accepts TTL inputs, drives CMOS-compatible outputs, and isolates sections during reconfiguration. Use Value: Maintains signal integrity across mixed-technology boundaries without external pull-ups or level shifters, reducing BOM cost and board space. | Use Scenario: Configurable signal path selection in modular benchtop DMM or waveform generator front-end. IC Role / Device Role / Timing Role: Routes calibration reference signals or measurement inputs between internal DACs, ADCs, and external connectors under microcontroller command. Use Value: Provides sub-15 ns propagation delay and <10 μA off-state leakage - critical for maintaining timing accuracy and minimizing cross-talk in precision metrology paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC257PW,118 | CMOS input thresholds (VIH = 3.15 V min @ VCC = 4.5 V); wider supply range (2.0–6.0 V) | Better suited for mixed-voltage systems where inputs may swing near VCC/2; less tolerant of TTL-level sources | Select when interfacing with HC-family logic or variable-supply designs requiring 2.0 V operation |
| SN74LV257APW | Lower VCC range (2.0–5.5 V); LV logic family; VIH = 1.7 V min @ VCC = 3.3 V | Optimized for 3.3 V systems; higher speed at lower voltage but not TTL-compatible | Select for 3.3 V-only designs needing improved noise immunity and reduced dynamic power vs. HCT |
Compared with 74HC257PW,118 and SN74LV257APW, the 74HCT257PW,118 uniquely bridges TTL and CMOS domains - offering guaranteed recognition of 5 V TTL inputs while driving robust CMOS outputs, making it irreplaceable in legacy-to-modern interface layers without level translation.
Availability
74HCT257PW,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller I/O expansion, and legacy system bus interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT257PW,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 focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.
The 74HCT series targets robust, pin-compatible replacements for legacy TTL logic in mixed-technology systems - emphasizing TTL input compatibility, wide temperature operation, and bus-friendly 3-state outputs for seamless integration.
FAQ
What is the maximum clock frequency supported by the 74HCT257PW,118?
The device does not operate synchronously but supports data routing up to approximately 30 MHz, derived from its 13 ns typical propagation delay (VCC = 4.5 V, CL = 15 pF). Maximum usable frequency depends on system-level setup/hold timing, load capacitance, and signal edge rates - not a fixed clock specification.
Can the 74HCT257PW,118 be used with a 3.3 V supply?
No - the 74HCT257PW,118 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, input thresholds (VIH ≥ 2.0 V) become unreliable, and output drive (VOH/VOL) falls outside guaranteed specifications. Use 74LV257 or 74LVC257 for 3.3 V systems.
How does the 3-state output enable (OE) interact with the select input (S)?
OE is independent of S: when OE is HIGH, all four Y outputs enter high-impedance regardless of S or input states; when OE is LOW, outputs respond normally to S - routing I0 if S = LOW, I1 if S = HIGH. This allows bus arbitration without affecting data selection logic.
Is the 74HCT257PW,118 automotive-qualified?
No - this part is not AEC-Q100 qualified. While rated for −40 °C to +125 °C, it lacks automotive-specific stress testing, failure analysis, and traceability documentation required for safety-critical vehicle systems. Use Nexperia's automotive-grade 74HCT257PW-Q100 for such applications.
74HCT257PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 6mA, 6mA
- 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:
- 16-TSSOP
74HCT257PW,118 FAQ
1.How can I place an order for 74HCT257PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT257PW,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 74HCT257PW,118 reliable?
The price and inventory of 74HCT257PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT257PW,118 is usually 5 days.
3.What payment methods are accepted for 74HCT257PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT257PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT257PW,118?
74HCT257PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT257PW,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 74HCT257PW,118?
For technical support, including 74HCT257PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT257PW,118 requirements.
6.How does Aetrix verify that 74HCT257PW,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT257PW,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 74HCT257PW,118 meets industry standards.
7.What is the process for return or replacement of 74HCT257PW,118?
All 74HCT257PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT257PW,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 74HCT257PW,118 part is unused and in its original packaging.
Return procedure for 74HCT257PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT257PW,118 Tags
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TC7SB3157CFU,LF(CT
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74CBTLV3257PW,118
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