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Nexperia USA Inc. 74HCT257D,652
- Part No.:
- 74HCT257D,652
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT257D,652.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,159
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Product details
Overview
74HCT257D,652 from Nexperia is a quad 2-input CMOS multiplexer with 3-state outputs, designed for bus-oriented data routing in digital systems. It features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient range, and delivers propagation delay as low as 13 ns (typ) at VCC = 4.5 V - enabling reliable signal selection in industrial control logic and microcontroller peripheral interfacing.
For engineers reviewing the 74HCT257D,652 datasheet, 74HCT257D,652 pinout, 74HCT257D,652 application, or 74HCT257D,652 equivalent, key selection criteria include its 3-state output enable (active LOW), common select line architecture, SO16 package compatibility with legacy PCB footprints, and guaranteed operation across extended temperature ranges without level-shifting circuitry.
Technical Context
This device implements four independent 2:1 multiplexers sharing a single data-select input (S) and a global 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 when OE is HIGH.
Its TTL-level input compatibility allows direct interfacing with legacy 5 V logic families, while CMOS output drive (±6 mA at VCC = 4.5 V) ensures robust bus loading capability. The internal clamp diodes support safe interface to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V TTL/CMOS system rails without regulation overhead |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures reliable recognition of TTL logic levels |
| Propagation Delay | 16 ns (max) at VCC = 4.5 V - enables timing-critical data path selection in sub-20 ns clock domains |
| Output Drive | ±6 mA at VCC = 4.5 V - sufficient to drive 10 LSTTL loads or 15 pF capacitive bus loads |
| Operating Temp | -40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives |
| Power Dissipation | 8 μA ICC (typ) at VCC = 5.5 V - enables low-quiescent-power standby in battery-backed systems |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - meets IEC 61000-4-2 Level 2 for board-level ESD robustness |
Pinout & Package
74HCT257D,652 uses the SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Common data select input | Single control line determining source (I0 or I1) for all four multiplexers |
| 2,5,11,14 (1I0–4I0) | Data inputs from source 0 | Four independent low-side inputs routed when S = LOW |
| 3,6,10,13 (1I1–4I1) | Data inputs from source 1 | Four independent high-side inputs routed when S = HIGH |
| 4,7,9,12 (1Y–4Y) | 3-state multiplexer outputs | Outputs go high-Z when OE = HIGH; otherwise reflect selected input |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and output drivers |
| 15 (OE) | 3-state output enable | Active LOW global control disabling all Y outputs simultaneously |
| 16 (VCC) | Supply voltage | Primary power rail for logic core and output buffers (4.5–5.5 V) |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Eliminates need for external level shifters when interfacing with legacy 5 V microcontrollers or FPGAs |
| 3-state bus interface | Enables direct connection to shared data buses without contention during idle cycles |
| Clamp diode protection | Permits safe overvoltage input handling up to VCC + 0.5 V using series resistors |
| Extended temperature range | Validated operation from -40 °C to +125 °C supports deployment in harsh environments |
| Low dynamic power | CPD = 45 pF per multiplexer enables predictable dynamic power calculation (PD = CPD × VCC² × fi × N) |
Applications
| Industrial PLC I/O Expansion | Microcontroller Peripheral Multiplexing |
|---|---|
Use Scenario: Routing analog sensor signals or digital status lines from multiple field devices onto a single ADC input or GPIO bank. IC Role / Device Role / Timing Role: Quad 2:1 selector enabling time-shared sampling of four sensor channels using one control bit (S) and global enable (OE). Use Value: Reduces PCB real estate and BOM count versus discrete logic; maintains signal integrity with <16 ns propagation skew across channels. | Use Scenario: Sharing limited MCU UART, SPI, or I²C pins among multiple peripherals via software-controlled routing. IC Role / Device Role / Timing Role: Bus-isolated signal switch allowing dynamic reconfiguration of communication paths without hardware changes. Use Value: Enables firmware-defined peripheral mapping; 3-state outputs prevent bus contention during reconfiguration sequences. |
| Legacy System Bus Interface | Digital Test Equipment Signal Routing |
Use Scenario: Interfacing modern FPGA-based controllers to legacy 5 V parallel bus peripherals (e.g., EPROMs, DACs, display drivers). IC Role / Device Role / Timing Role: Level-translating multiplexer ensuring TTL-compatible input recognition and CMOS bus-driving capability. Use Value: Eliminates need for discrete resistor networks or dedicated level translators; supports hot-swap-safe bus isolation via OE control. | Use Scenario: Automated test fixtures requiring programmable routing of stimulus signals or measurement probes across DUT pins. IC Role / Device Role / Timing Role: Precision-controlled signal path selector synchronized to test controller clocks and enable strobes. Use Value: Guarantees <16 ns channel-to-channel skew and <45 ns enable/disable transitions for deterministic test sequencing. |
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 |
|---|---|---|---|
| SN74HCT257N | Dual-in-line (DIP-16) package; identical electrical specs but through-hole mounting | Suitable for prototyping or legacy through-hole assemblies; lacks SO16 thermal performance | Select for hand-soldered evaluation or repair where SO16 reflow is unavailable |
| 74LVC257PW | 3.3 V only (1.65–3.6 V); lower VIL/VIH thresholds; TSSOP16 package | Designed for mixed-voltage 3.3 V systems; incompatible with 5 V TTL inputs without translation | Choose only for new 3.3 V designs requiring lower power and smaller footprint |
Compared with SN74HCT257N and 74LVC257PW, the 74HCT257D,652 uniquely balances 5 V TTL interoperability, SO16 surface-mount reliability, and extended temperature qualification - making it optimal for production-grade industrial and automotive-adjacent control modules.
Availability
74HCT257D,652 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller peripheral multiplexing, legacy system bus interface, and digital test equipment signal routing requiring stable component supply across extended temperature ranges.
Supply support for 74HCT257D,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, discrete, and MOSFET solutions optimized for efficiency and miniaturization in mass-market electronics.
The 74HCT series targets industrial and consumer applications requiring TTL-compatible CMOS logic with robust noise immunity, low power, and wide operating margins - especially where legacy 5 V system integration is critical.
FAQ
What is the maximum clock frequency supported by 74HCT257D,652?
The device does not operate as a clocked sequential element; it is combinational logic. Its usable data rate depends on propagation delay (16 ns max) and system setup/hold timing. For clean switching with 15 pF load, maximum toggle rate is ~30 MHz, assuming adequate board layout and drive strength.
Can 74HCT257D,652 interface directly with 3.3 V microcontrollers?
No - its inputs require VIH ≥ 2.0 V (TTL-compatible), but 3.3 V logic may not guarantee this margin under noise or loading. Use level translators or select 74LVC257 for native 3.3 V operation. Direct connection risks unreliable HIGH detection.
Is the 74HCT257D,652 pin-compatible with the 74HC257D variant?
Yes - identical pinout and function. Key difference is input threshold: 74HC257 requires CMOS-level inputs (VIH ≈ 0.7×VCC), while 74HCT257 accepts TTL levels (VIH = 2.0 V min). Electrical substitution is possible only if driving source meets the stricter 74HC257 threshold.
Does 74HCT257D,652 support hot-swap or live-insertion?
Not inherently - it lacks built-in hot-swap protection circuitry. However, its input clamp diodes and 3-state outputs allow safe insertion into powered backplanes when OE is held HIGH during insertion and only asserted after power stabilization and bus initialization.
74HCT257D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-SO
74HCT257D,652 FAQ
1.How can I place an order for 74HCT257D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT257D,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 74HCT257D,652 reliable?
The price and inventory of 74HCT257D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT257D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT257D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT257D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT257D,652?
74HCT257D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT257D,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 74HCT257D,652?
For technical support, including 74HCT257D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT257D,652 requirements.
6.How does Aetrix verify that 74HCT257D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT257D,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 74HCT257D,652 meets industry standards.
7.What is the process for return or replacement of 74HCT257D,652?
All 74HCT257D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT257D,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 74HCT257D,652 part is unused and in its original packaging.
Return procedure for 74HCT257D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT257D,652 Tags
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74CBTLV3257PW,118
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SN74CB3Q3245PWR
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SN74HC138N
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