My Inquiry
My Account
STMicroelectronics M74HC257RM13TR
- Part No.:
- M74HC257RM13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M74HC257RM13TR.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,933
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M74HC257RM13TR from STMicroelectronics is a high-speed CMOS quad 2-channel multiplexer with 3-state outputs, non-inverting logic, common SELECT and active-low ENABLE (OE) control, 11 ns typical propagation delay at 6 V, ±6 mA output drive, and operation from 2 V to 6 V supply. It routes four independent A/B data pairs to corresponding Y outputs in industrial control I/O expansion.
For engineers reviewing the M74HC257RM13TR datasheet, M74HC257RM13TR pinout, M74HC257RM13TR application, or M74HC257RM13TR equivalent, key selection criteria include 3-state output timing (tPZL/tPLZ), input noise immunity (28% VCC), symmetrical drive strength, wide voltage range compatibility, and TSSOP-16 footprint constraints.
Technical Context
The M74HC257RM13TR implements four independent 2:1 multiplexers sharing one SELECT line and one active-low OE input, enabling simultaneous channel selection and global output disable. Its C2MOS silicon gate process ensures low static current (4 µA max) and high noise margin across the full 2–6 V operating range.
Propagation delays are balanced (tPLH ≅ tPHL), transition times are symmetric (tTLH ≅ tTHL), and output enable/disable timing is characterized under 1 kΩ load. All inputs include ESD and transient voltage protection circuits per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 6 V - supports mixed-voltage system interfacing and battery-powered operation down to 2 V |
| tPD (Typ) | 11 ns at VCC = 6 V - enables reliable operation in 30+ MHz digital control loops |
| IOL / IOH | ±6 mA min - drives standard TTL loads and multiple CMOS inputs without buffering |
| VNIH / VNIL | 28% VCC min - rejects >1.2 V noise on 4.5 V systems, improving robustness in noisy environments |
| ICC (Max) | 4 µA at TA = 25°C - enables ultra-low-power standby in always-on monitoring nodes |
| Output Type | 3-state non-inverting - allows bus sharing and avoids contention in multi-source data paths |
| Operating Temp | −55°C to +125°C - qualified for under-hood automotive and industrial motor control enclosures |
Pinout & Package
TSSOP-16 package: 4.9 × 6.4 mm body, 0.65 mm pitch, 1.2 mm height, lead-free, RoHS-compliant surface-mount outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SELECT | Common 2:1 channel select for all four multiplexers; low = A-input, high = B-input |
| 2,5,14,11 | 1A–4A | Four independent data inputs from source A side; routed to Y when SELECT = low |
| 3,6,13,10 | 1B–4B | Four independent data inputs from source B side; routed to Y when SELECT = high |
| 4,7,12,9 | 1Y–4Y | Four 3-state non-inverting outputs; high-impedance when OE = high |
| 15 | OE | Active-low output enable; disables all Y outputs simultaneously into high-Z state |
| 8 | GND | Digital ground reference for logic and output stages |
| 16 | VCC | Positive supply rail; powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement | Direct drop-in for 74LS257 and 74HC257 in existing TSSOP-16 layouts |
| Balanced propagation delays | tPLH and tPHL match within 1 ns at 6 V - eliminates skew-induced timing hazards in parallel data paths |
| High noise immunity | VIH/VIL thresholds fixed at 3.15 V / 1.35 V (at VCC = 4.5 V) - prevents false switching near logic thresholds |
| Low power consumption | ICC ≤ 4 µA at 25°C - reduces thermal load and extends battery life in portable instrumentation |
| ESD-protected inputs | Withstands ≥2 kV HBM - eliminates need for external TVS diodes in moderate-noise industrial PCBs |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Multiplexing sensor inputs (temperature, pressure, position) from multiple zones onto shared ADC channels in programmable logic controllers. IC Role / Device Role / Timing Role: Quad 2:1 selector routing analog front-end signals while maintaining channel isolation and minimizing crosstalk-induced offset. Use Value: Reduces component count by replacing four discrete switches; 11 ns delay ensures synchronization across 4-channel sampling windows. | Use Scenario: Consolidating switch status signals (door open, seatbelt latch, trunk release) into a single microcontroller GPIO port in body electronics units. IC Role / Device Role / Timing Role: Level-translating and gating mechanical switch inputs before debouncing and polling by MCU firmware. Use Value: Enables 2–6 V operation matching vehicle battery fluctuations; 3-state outputs allow safe sharing of diagnostic bus lines. |
| Test Equipment Signal Routing | Medical Patient Monitor Data Aggregation |
Use Scenario: Dynamically reconfiguring signal paths between DUT interfaces, calibration references, and measurement backplanes in automated test systems. IC Role / Device Role / Timing Role: High-speed, low-skew multiplexer enabling sub-100 ns path switching during functional test sequences. Use Value: Symmetrical tPLH/tPHL and 6 mA drive support clean transitions into 50 Ω transmission lines without overshoot. | Use Scenario: Time-division multiplexing of ECG, SpO₂, and NIBP analog sensor outputs onto a shared SAR ADC in portable patient monitors. IC Role / Device Role / Timing Role: Low-leakage (±0.5 µA IOZ), rail-to-rail compatible multiplexer preserving signal integrity in precision biopotential acquisition. Use Value: 4 µA ICC and −55°C to +125°C rating support long-duration battery operation and sterilization temperature tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC257PWR | TSSOP-16, identical logic function and AC specs; slightly higher tPD (13 ns typ at 6 V) and lower noise immunity (20% VCC) | Valid for commercial-temp (−40°C to +85°C) designs only; not rated for extended temperature operation | Select when cost sensitivity outweighs extended temp requirement and minor timing margin loss is acceptable |
| 74LVC257PW | 3.3 V only (1.65–3.6 V), faster tPD (5.5 ns typ), but no 2–6 V flexibility or −55°C rating | Requires level-shifting in mixed-voltage systems; unsuitable for direct 5 V or battery-down-to-2 V use | Prefer for high-speed 3.3 V-only digital subsystems where voltage headroom and extended temp are not required |
Compared with SN74HC257PWR and 74LVC257PW, the M74HC257RM13TR uniquely supports full industrial temperature range, 2–6 V operation, and highest noise immunity - making it the sole choice for unregulated supply or harsh-environment deployments.
Availability
M74HC257RM13TR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, automated test equipment signal routing, and portable medical monitor data aggregation requiring stable component supply across extended temperature and voltage ranges.
Supply support for M74HC257RM13TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and logic devices for industrial, automotive, and consumer markets.
The M74HC257RM13TR belongs to ST's high-reliability HC logic family, engineered for robust performance in extended-temperature industrial control and automotive body electronics applications.
FAQ
What is the maximum clock/data frequency supported by the M74HC257RM13TR?
The device does not operate on a clock; it is combinational logic. Maximum usable data rate depends on propagation delay and system timing margins. With 11 ns typical tPD and balanced edges, it reliably supports asynchronous data switching up to ~30 MHz in well-terminated 50 Ω environments, assuming setup/hold time compliance at the destination register.
Can the M74HC257RM13TR interface directly with 3.3 V microcontrollers?
Yes. At VCC = 3.3 V, VIH = 2.31 V (70% of 3.3 V) and VIL = 0.99 V (30% of 3.3 V), fully compatible with standard 3.3 V CMOS logic levels. Output VOH/VOL also meet 3.3 V interface requirements when driving light loads (<6 mA).
Is the ENABLE (OE) pin truly active-low, and what happens when it's left floating?
Yes, OE is active-low: outputs go high-impedance only when OE is logic low. If left floating, internal pull-down circuitry (per datasheet input leakage spec) forces OE to logic low, causing unintended output enable - always tie OE to VCC or GND via a resistor for deterministic behavior.
Does the M74HC257RM13TR support hot-swap or live-insertion?
No. The device lacks powered-off protection or Ioff partial power-down capability. Applying signals to inputs while VCC = 0 V may cause latch-up or excessive current flow due to internal diode conduction; power sequencing must ensure VCC is stable before asserting inputs or outputs.
M74HC257RM13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
M74HC257RM13TR FAQ
1.How can I place an order for M74HC257RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC257RM13TR 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 M74HC257RM13TR reliable?
The price and inventory of M74HC257RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC257RM13TR is usually 5 days.
3.What payment methods are accepted for M74HC257RM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC257RM13TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HC257RM13TR?
M74HC257RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC257RM13TR 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 M74HC257RM13TR?
For technical support, including M74HC257RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC257RM13TR requirements.
6.How does Aetrix verify that M74HC257RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HC257RM13TR 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 M74HC257RM13TR meets industry standards.
7.What is the process for return or replacement of M74HC257RM13TR?
All M74HC257RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC257RM13TR, 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 M74HC257RM13TR part is unused and in its original packaging.
Return procedure for M74HC257RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M74HC257RM13TR Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
