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STMicroelectronics M74HC237RM13TR
- Part No.:
- M74HC237RM13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M74HC237RM13TR.pdf
- Description:
- IC DECODER/DEMUX 1 X 3:8 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,136
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Product details
Overview
M74HC237RM13TR from STMicroelectronics is a high-speed CMOS 3-to-8 line decoder with latch, operating from 2V to 6V supply, featuring 16ns typical propagation delay at 6V, ±4mA output drive, and independent active-high G1 / active-low G2 enable control. It implements glitch-free address decoding in bus-oriented systems where stored-address stability is required.
For engineers reviewing the M74HC237RM13TR datasheet, M74HC237RM13TR pinout, M74HC237RM13TR application, or M74HC237RM13TR equivalent, key selection criteria include latch-enable timing (tW(L) = 6ns min at 6V), symmetrical output impedance, wide VCC range, noise immunity (28% VCC), and TSSOP-16 packaging for space-constrained digital logic designs.
Technical Context
The M74HC237RM13TR integrates three address inputs (A, B, C), a latch-enable input (GL), and dual independent output enables (G1 active-high, G2 active-low) to gate all eight decoded outputs (Y0–Y7). Its latching architecture freezes the input address on GL rising edge, decoupling output state from subsequent address changes.
Propagation delays are balanced (tPLH ≅ tPHL), with worst-case tPLH/tPHL of 46ns at 6V across temperature ranges. Input thresholds scale with VCC (VIH = 0.7×VCC min, VIL = 0.3×VCC max), and outputs meet 4mA sink/source capability while maintaining VOL ≤ 0.4V and VOH ≥ 5.6V at 6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 6V - supports mixed-voltage system interfacing and battery-powered logic |
| tPD (Typ) | 16ns at VCC = 6V - enables high-speed bus decoding in 25MHz+ clock domains |
| IOL/IOH | ±4mA min - drives standard TTL loads and multiple 74HC inputs without buffering |
| VNIH/VNIL | 28% VCC min - ensures robust operation in noisy industrial environments |
| ICC (Max) | 4µA at TA = 25°C - ultra-low static power for always-on control logic |
| Operating Temp | −55°C to +125°C - qualified for automotive under-hood and industrial control applications |
Pinout & Package
TSSOP-16 package: 4.9 × 6.4 mm body, 0.65 mm pitch, thin-profile surface-mount with exposed pad not present; RoHS-compliant, moisture sensitivity level MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | A, B, C | 3-bit binary address inputs - determine active Yx output when enables are asserted |
| 4 | GL | Latch Enable - rising edge captures and holds A/B/C value; disables re-latching while high |
| 5 | G2 | Active-Low Output Enable - must be low with G1 high for any Yx to go active-low |
| 6 | G1 | Active-High Output Enable - controls global output activation alongside G2 |
| 7, 9–15 | Y0–Y7 | Active-low decoded outputs - only one asserted per valid address/enables combination |
| 8 | GND | Ground reference - return path for all internal logic and output currents |
| 16 | VCC | Positive supply - powers internal C2MOS logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Latched Address Storage | GL rising-edge capture eliminates address glitches during bus transitions |
| Independent Dual Enables | G1 (active-high) and G2 (active-low) allow flexible hierarchical enable tree design |
| Balanced Propagation Delays | tPLH ≅ tPHL minimizes skew between rising/falling edges in timing-critical paths |
| High Noise Immunity | 28% VCC input threshold margin prevents false triggering in EMI-prone environments |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Decoding microcontroller GPIOs to select among 8 peripheral devices on a shared data bus. IC Role / Device Role / Timing Role: Glitch-free address latch ensures stable peripheral selection during rapid bus arbitration. Use Value: Eliminates need for external RC filters or additional synchronization logic in real-time control loops. | Use Scenario: Enabling discrete sensor or actuator drivers based on CAN message payload address bits. IC Role / Device Role / Timing Role: Latched decode isolates driver activation from transient bus noise during message reception. Use Value: Prevents spurious actuator activation in safety-critical lighting or door-lock subsystems. |
| Medical Diagnostic Equipment Backplane | Test & Measurement Instrument Multiplexing |
Use Scenario: Routing analog front-end channel selects in modular signal acquisition units. IC Role / Device Role / Timing Role: Dual enable control (G1/G2) allows synchronized activation across multiple M74HC237RM13TR devices. Use Value: Enables precise channel sequencing without inter-device skew or metastability risk. | Use Scenario: Selecting calibration DACs or reference buffers in automated test equipment. IC Role / Device Role / Timing Role: Low ICC (4µA) and wide VCC range support battery-backed configuration memory retention. Use Value: Extends runtime of portable bench instruments during standby without compromising decode accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-to-8 latch decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC237PW | TSSOP-16, identical logic function and DC specs; AC specs differ slightly (tPD = 19ns typ at 6V vs 16ns) | Same pinout and enable structure; lower noise immunity (20% VCC vs 28%) | Preferred where TI ecosystem compatibility or legacy design reuse is prioritized |
| 74VHC237M | SOIC-16, higher speed (tPD = 10ns typ at 5V), but narrower VCC range (2V–5.5V) | No −55°C to +125°C rating; unsuitable for extended-temperature automotive use | Chosen when board space permits SOIC and sub-10ns timing is mandatory |
Compared with SN74HC237PW and 74VHC237M, the M74HC237RM13TR delivers superior noise immunity and extended temperature support in a compact TSSOP package, making it optimal for ruggedized embedded systems where reliability outweighs marginal speed gains.
Availability
M74HC237RM13TR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and medical diagnostic backplanes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HC237RM13TR 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 analog/mixed-signal products for industrial, automotive, and consumer markets.
The M74HC237RM13TR belongs to ST's high-speed HC logic family, engineered for low-power, noise-immune digital interfacing in mission-critical embedded control systems.
FAQ
What is the minimum pulse width requirement for the GL (Latch Enable) input?
The minimum GL pulse width is 6ns at VCC = 6V over −40°C to +85°C, increasing to 13ns at −55°C to +125°C. This ensures reliable capture of address inputs without metastability, and must be met by driving logic to guarantee deterministic latching behavior in high-speed systems.
Can M74HC237RM13TR operate with a 3.3V supply in mixed-voltage designs?
Yes - the device is fully specified from 2V to 6V, including 3.3V operation. At 3.3V, VIH = 2.31V min and VIL = 0.99V max, ensuring clean interfacing with 3.3V microcontrollers and FPGA I/O banks without level shifters.
How does the dual-enable architecture (G1 and G2) improve system-level design flexibility?
G1 (active-high) and G2 (active-low) allow hierarchical enable trees: G2 can serve as a global disable (e.g., system reset), while G1 enables fine-grained per-subsystem control. This eliminates OR-gating logic and reduces PCB routing complexity in multi-decoder configurations.
Is thermal derating required for continuous operation at 125°C ambient?
Yes - maximum power dissipation drops from 500mW at 65°C to 300mW at 85°C, derated linearly at 10mW/°C beyond 65°C. At 125°C, PD must remain ≤ 240mW; actual dissipation (ICC × VCC ≈ 80µA × 6V = 480µW) is well within limit, so no external thermal mitigation is needed.
M74HC237RM13TR 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:
- Decoder/Demultiplexer
- Circuit:
- 1 x 3:8
- Independent Circuits:
- 1
- Current - Output High, Low:
- 5.2mA, 5.2mA
- 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
M74HC237RM13TR FAQ
1.How can I place an order for M74HC237RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC237RM13TR 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 M74HC237RM13TR reliable?
The price and inventory of M74HC237RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC237RM13TR is usually 5 days.
3.What payment methods are accepted for M74HC237RM13TR?
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4.How is shipping managed for M74HC237RM13TR?
M74HC237RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC237RM13TR 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 M74HC237RM13TR?
For technical support, including M74HC237RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC237RM13TR requirements.
6.How does Aetrix verify that M74HC237RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HC237RM13TR 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 M74HC237RM13TR meets industry standards.
7.What is the process for return or replacement of M74HC237RM13TR?
All M74HC237RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC237RM13TR, 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 M74HC237RM13TR part is unused and in its original packaging.
Return procedure for M74HC237RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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