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NXP Semiconductors 74HC257N,652
- Part No.:
- 74HC257N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC257N,652.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,789
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Product details
Overview
74HC257N,652 from NXP Semiconductors is a quad 2-input CMOS multiplexer with 3-state outputs, implementing a logic-controlled 4-pole, 2-position switch. It selects 4-bit data from two sources (1I0–4I0 or 1I1–4I1) via common select input S, delivers true (non-inverting) outputs (1Y–4Y), and enters high-impedance OFF-state when OE is HIGH. It operates across −40 °C to +125 °C with VCC = 2.0–6.0 V and is used in bus interface and data routing applications.
For engineers reviewing the 74HC257N,652 datasheet, 74HC257N,652 pinout, 74HC257N,652 application, or 74HC257N,652 equivalent, key selection considerations include its non-inverting data path, 3-state bus compatibility, JEDEC 7A compliance, ±20 V input clamping, and propagation delay of 10–33 ns at VCC = 6.0 V or 4.5 V respectively.
Technical Context
The 74HC257N,652 implements four independent 2:1 multiplexers sharing one data select (S) and one output enable (OE) control line. Each multiplexer routes either source-0 or source-1 inputs to its corresponding true-output terminal based on S logic level, while OE independently gates all outputs into high-impedance state regardless of S or input states.
Its static characteristics include VIH = 1.5 V (min) at VCC = 2.0 V and VOL = 0.1 V (max) at IO = 6.0 mA, VCC = 4.5 V; dynamic performance features tpd = 10 ns (typ) and tt = 4 ns (typ) at VCC = 6.0 V, CL = 15 pF, confirming suitability for medium-speed digital bus switching in industrial control and instrumentation systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered operation down to 2 V logic levels. |
| Propagation Delay | 10 ns (typ) at VCC = 6.0 V - enables reliable timing in 50 MHz+ data routing paths with margin. |
| Output Drive | ±6.0 mA at VCC = 4.5 V - sufficient to drive standard TTL loads and multiple CMOS inputs without buffering. |
| Input Clamping | ±20 mA - protects against transient overvoltage events per IEC 60134 limiting values. |
| ESD Rating | HBM > 2000 V - meets industrial-grade robustness requirements per JESD22-A114F. |
| Operating Temp | −40 °C to +125 °C - qualified for under-hood automotive modules and harsh-environment industrial PLCs. |
| Power Dissipation Cap | 45 pF per multiplexer - enables accurate dynamic power estimation using PD = CPD × VCC² × fi × N. |
Pinout & Package
DIP16 plastic dual in-line package (300 mil), 16-pin through-hole format with 0.3 inch row spacing and standard 0.1 inch pin pitch - compatible with legacy PCB layouts and manual prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Common data select input | Controls source selection for all four multiplexers: LOW → source-0, HIGH → source-1. |
| 2, 5, 11, 14 (1I0–4I0) | Data inputs from source 0 | Four parallel low-side data lanes routed when S = LOW; electrically isolated from source-1 inputs. |
| 3, 6, 10, 13 (1I1–4I1) | Data inputs from source 1 | Four parallel high-side data lanes routed when S = HIGH; no crosstalk with source-0 path. |
| 4, 7, 9, 12 (1Y–4Y) | 3-state multiplexer outputs | True (non-inverting) outputs; enter high-Z when OE = HIGH, enabling shared bus arbitration. |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and I/O; must be low-impedance for noise immunity. |
| 15 (OE) | 3-state output enable (active LOW) | Global output gate: LOW enables outputs, HIGH forces all Y pins to high-impedance state. |
| 16 (VCC) | Supply voltage | Primary power rail for CMOS logic core and output drivers; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Non-inverting data path | Preserves signal polarity across all four channels - eliminates need for external inverters in bidirectional bus designs. |
| 3-state outputs | Enables direct connection to shared data buses without contention; OE control allows precise timing of bus release. |
| JEDEC Std. 7A compliance | Ensures interoperability with LSTTL logic families and guarantees standardized AC/DC electrical behavior. |
| Wide temperature range | −40 °C to +125 °C operation validated per manufacturer qualification - suitable for engine control units and motor drives. |
| Low input capacitance | 3.5 pF typical - minimizes loading on driving circuits and preserves signal integrity in high-frequency routing. |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
|
Use Scenario: Expanding discrete input capacity in programmable logic controllers by multiplexing multiple sensor banks onto a single microcontroller port. IC Role / Device Role / Timing Role: Quad 2:1 selector routing analog/digital sensor signals to ADC or GPIO lines under firmware control via S and OE. Use Value: Reduces MCU pin count requirement by 4× while maintaining real-time channel selection with <33 ns propagation delay. |
Use Scenario: Adapting older 8-bit parallel peripherals (e.g., printers, displays) to modern microcontrollers with limited I/O. IC Role / Device Role / Timing Role: Bidirectional data path selector enabling shared bus access between host and peripheral using OE-gated 3-state outputs. Use Value: Eliminates need for external bus transceivers; non-inverting logic ensures protocol-level signal integrity across TTL/CMOS voltage thresholds. |
| Test Equipment Signal Routing | Automotive Body Control Module |
|
Use Scenario: Configurable signal path switching in automated test equipment for routing calibration references or DUT signals. IC Role / Device Role / Timing Role: Precision analog/digital multiplexer controlled by FPGA or microcontroller to route stimulus or measurement paths. Use Value: High-impedance OFF-state (<±5 μA leakage) prevents signal bleed during reconfiguration; 125 °C rating supports compact enclosure thermal design. |
Use Scenario: Consolidating door lock, window, and mirror control signals in automotive body electronics modules. IC Role / Device Role / Timing Role: Logic-level multiplexer selecting between master ECU commands and local override inputs before driver stage. Use Value: Automotive-grade temperature range and HBM >2000 V ESD protection ensure reliability in vehicle subsystems without additional protection circuitry. |
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 |
|---|---|---|---|
| 74HC258N,652 | Inverting outputs (vs. non-inverting in 74HC257N,652); otherwise identical pinout, timing, and DC specs. | Requires downstream inversion for true-logic signal chains; unsuitable where polarity preservation is mandatory. | Select 74HC257N,652 when signal polarity must be maintained end-to-end; choose 74HC258N,652 only if inverting path simplifies overall logic. |
| SN74LV257N | Lower VCC range (2.0–5.5 V), higher drive strength (±12 mA), but narrower temp range (−40 °C to +105 °C). | Not rated for 125 °C environments; better suited for consumer-grade embedded systems with tighter power budgets. | Prefer 74HC257N,652 for extended temperature applications; use SN74LV257N where higher sink/source current is critical and ambient stays ≤105 °C. |
Compared with 74HC257N,652, the 74HC258N,652 requires polarity compensation in true-logic systems, while the SN74LV257N trades extended temperature capability for enhanced drive strength - making 74HC257N,652 the optimal choice for industrial and automotive signal routing requiring both non-inverting operation and full −40 °C to +125 °C support.
Availability
74HC257N,652 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface adapters, test equipment signal routing, and automotive body control modules requiring stable component supply across extended temperature ranges.
Supply support for 74HC257N,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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74HC257N,652 belongs to NXP's HC-series high-speed CMOS logic family, designed for low-power, pin-compatible replacements of legacy TTL devices in noise-sensitive and thermally demanding embedded systems.
FAQ
What is the maximum supply voltage for the 74HC257N,652?
The absolute maximum supply voltage (VCC) for the 74HC257N,652 is +7.0 V per limiting values in the datasheet; however, the recommended operating range is 2.0 V to 6.0 V. Operating continuously above 6.0 V risks exceeding safe power dissipation limits and may degrade long-term reliability. The 74HC257N,652 is not rated for 7.0 V sustained operation.
Does the 74HC257N,652 support 3.3 V logic systems?
Yes, the 74HC257N,652 supports 3.3 V operation within its recommended VCC range of 2.0–6.0 V. At VCC = 3.3 V, VIH is guaranteed ≥2.1 V and VIL ≤1.35 V, ensuring compatibility with standard 3.3 V CMOS outputs. The 74HC257N,652 maintains full functionality including 3-state control and propagation delay <25 ns at this voltage.
How does the OE pin function on the 74HC257N,652?
The OE (output enable) pin on the 74HC257N,652 is active LOW: when OE = LOW, outputs 1Y–4Y reflect the selected inputs; when OE = HIGH, all outputs enter high-impedance (Z) state regardless of S or input states. This enables bus sharing without contention. The 74HC257N,652 does not invert OE logic - it is a direct enable control.
Is the 74HC257N,652 pin-compatible with 74HCT257N variants?
Yes, the 74HC257N,652 is pin-compatible with the 74HCT257N series, sharing identical DIP16 pinout, pin functions, and mechanical footprint. However, the 74HC257N,652 uses CMOS input thresholds (VIH ≈ 0.7×VCC), while 74HCT257N uses TTL-compatible thresholds (VIH = 2.0 V min). Interchangeability requires verifying input voltage levels in the target system.
What is the typical propagation delay of the 74HC257N,652 at 5.0 V?
At VCC = 5.0 V and CL = 15 pF, the typical propagation delay (tpd) of the 74HC257N,652 is 11 ns for data inputs (1I0/1I1 → 1Y) and 14 ns for select input (S → 1Y), per Table 7 of the datasheet. These values represent average transition times under standard test conditions and are valid across the full −40 °C to +125 °C operating range.
74HC257N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
74HC257N,652 FAQ
1.How can I place an order for 74HC257N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC257N,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 74HC257N,652 reliable?
The price and inventory of 74HC257N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC257N,652 is usually 5 days.
3.What payment methods are accepted for 74HC257N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC257N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC257N,652?
74HC257N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC257N,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 74HC257N,652?
For technical support, including 74HC257N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC257N,652 requirements.
6.How does Aetrix verify that 74HC257N,652 is sourced from the original manufacturer or authorized distributors?
All 74HC257N,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 74HC257N,652 meets industry standards.
7.What is the process for return or replacement of 74HC257N,652?
All 74HC257N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC257N,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 74HC257N,652 part is unused and in its original packaging.
Return procedure for 74HC257N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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