My Inquiry
My Account
Texas Instruments CD74HC237PWR
- Part No.:
- CD74HC237PWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD74HC237PWR.pdf
- Description:
- IC DECODER/DEMUX 1X3:8 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,437
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD74HC237PWR from Texas Instruments is a high-speed CMOS 3-to-8 line decoder/demultiplexer with address latches, featuring active-high outputs, dual output enables (OE0, OE1), and latch enable (LE) for input isolation. It operates from 2V to 6V, delivers 13ns typical propagation delay at 5V/15pF, and supports industrial temperature range (-55°C to +125°C). It is used in memory address decoding and data routing within embedded control systems.
For engineers reviewing the CD74HC237PWR datasheet, CD74HC237PWR pinout, CD74HC237PWR application, or CD74HC237PWR equivalent, this page provides verified functional behavior, TSSOP-16 package details, truth table–confirmed active-high decoding logic, thermal and switching specifications per SCHS146F, and validated alternatives for design continuity.
Technical Context
The CD74HC237PWR implements a 3-bit binary latch followed by an active-high 1-of-8 decoder. Its LE input latches A0–A2 when high, decoupling outputs from subsequent address changes; when LE is low, outputs track inputs transparently. Two independent output enables (OE0, OE1) support cascading and demultiplexing - one enable serves as data input while the other remains asserted.
Unlike the CD74HC137 (active-low output), the CD74HC237PWR asserts the selected Yn output high while all others remain low. Its HC logic family ensures CMOS-level noise immunity (NIL/NIH = 30% of VCC at 5V), low quiescent current (≤160 µA over full temperature range), and compatibility with both LSTTL and CMOS input thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), not TTL-compatible; requires 2V–6V supply, no 5V-only constraint |
| Output Polarity | Active-high decoding: selected Yn = HIGH, unselected outputs = LOW (per 'HC237 truth table) |
| Propagation Delay | 13 ns typical at VCC = 5V, CL = 15pF, TA = 25°C - enables timing-critical address decode in ≤76 MHz systems |
| Operating Temperature | -55°C to +125°C - qualified for aerospace, automotive under-hood, and industrial motor control environments |
| Supply Voltage Range | 2V to 6V - supports battery-backed, multi-rail, or wide-input-voltage industrial designs without level shifting |
| Input Leakage Current | ±1 µA max over full temperature range - ensures reliable high-impedance input behavior in low-power sleep modes |
| Power Dissipation Capacitance | 23 pF (CPD) at 5V - used to calculate dynamic power: PD = VCC² × fi × (CPD + CL) |
Pinout & Package
TSSOP-16 package (PW), 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | Binary Address Input | LSB of 3-bit select code; sampled only when LE is low or during LE transition per setup/hold timing |
| 2 (A1) | Binary Address Input | Middle bit of address; latched on LE high, holds output selection stable against address bus noise |
| 3 (A2) | Binary Address Input | MSB of address; determines Y0–Y7 mapping; must meet tSU/tH relative to LE edge |
| 4 (LE) | Latch Enable | Active-high control: high = latch mode (outputs frozen), low = transparent mode (outputs follow A0–A2) |
| 5 (OE1) | Output Enable 1 | Active-low enable; used with OE0 for cascading or as data input in demux mode when OE0 is held low |
| 6 (OE0) | Output Enable 0 | Active-low enable; primary enable; both OE0 and OE1 must be low for any output to assert |
| 7 (GND) | Ground Reference | Return path for all I/O and internal logic; requires low-inductance connection to minimize ground bounce |
| 8 (Y0) | Decoder Output | Active-high output corresponding to A2A1A0 = 000; sinks/source up to ±25 mA per output |
| 9 (Y1) | Decoder Output | Active-high output for A2A1A0 = 001; electrically identical to Y0; shares same drive strength and timing |
| 10 (Y2) | Decoder Output | Active-high output for A2A1A0 = 010; fanout = 10 LSTTL loads over full temperature range |
| 11 (Y3) | Decoder Output | Active-high output for A2A1A0 = 011; transitions limited to ≤19 ns (tTLH/tTHL) at 6V/50pF |
| 12 (Y4) | Decoder Output | Active-high output for A2A1A0 = 100; output capacitance CI = 10 pF - critical for trace-length matching |
| 13 (Y5) | Decoder Output | Active-high output for A2A1A0 = 101; supports demux function when OE0 or OE1 acts as data input |
| 14 (Y6) | Decoder Output | Active-high output for A2A1A0 = 110; maintains balanced rise/fall times (tPLH ≈ tPHL) |
| 15 (Y7) | Decoder Output | Active-high output for A2A1A0 = 111; final decoded channel; shares same propagation delay spec as Y0–Y6 |
| 16 (VCC) | Positive Supply | CMOS rail: 2V–6V; bypassing with 0.1 µF ceramic capacitor near pin essential for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Address Latching with LE Control | Enables glitch-free output hold during address bus updates - critical for shared-memory arbitration in microcontroller peripherals |
| Two Independent Output Enables | Permits hierarchical decoding (e.g., chip-select + sub-address) and flexible demux configuration without external logic |
| Active-High Output Logic | Direct interface to LED drivers, pull-up-based interrupt lines, or high-true enable inputs - eliminates external inverters |
| Wide-Voltage Operation (2V–6V) | Supports direct integration into mixed-supply systems (e.g., 3.3V MCU with 5V peripheral bus) without level shifters |
| Low Dynamic Power Consumption | CPD = 23 pF enables <1 mW operation at 1 MHz with 50 pF load - suitable for battery-powered instrumentation |
| Extended Temperature Range | -55°C to +125°C rating allows deployment in engine control units, downhole tools, and military avionics |
Applications
| Memory Address Decoding | Peripheral Device Selection |
|---|---|
|
Use Scenario: Microcontroller with 16-bit address bus selects among eight memory-mapped peripherals (e.g., ADC, DAC, UART, GPIO expanders). IC Role / Device Role: CD74HC237PWR decodes upper address bits (A13–A15) to generate individual /CS signals for each peripheral. Use Value: Eliminates need for discrete logic gates; latch function prevents spurious selections during address settling. |
Use Scenario: Industrial PLC backplane routes control signals to eight I/O modules via shared data bus. IC Role / Device Role: CD74HC237PWR acts as module selector, enabling one module's transceiver while disabling others. Use Value: Dual OE inputs allow hierarchical enable architecture - e.g., bank enable + module enable - reducing control lines. |
| Data Demultiplexing | Programmable Logic Interface |
|
Use Scenario: Single serial data stream from FPGA is routed to one of eight test points for signal injection or monitoring. IC Role / Device Role: CD74HC237PWR configured as demux: A0–A2 = channel address, OE0 = data input, OE1 = constant low. Use Value: Active-high outputs directly drive 74LVC-level inputs; no additional buffering needed for 3.3V logic domains. |
Use Scenario: Field-configurable test fixture uses DIP switches to set A0–A2, generating fixed enable patterns for analog multiplexers. IC Role / Device Role: CD74HC237PWR provides deterministic, latch-stabilized output states based on manual switch settings. Use Value: LE pin allows firmware to freeze configuration during hot-swap events - prevents transient glitches on analog paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-to-8 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC237PWR | Pin-compatible Texas Instruments part; identical logic function, timing, and DC specs; same TSSOP-16 package and marking (HJ237) | No functional difference; SN74HC237PWR is catalog-numbered variant with identical qualification and packaging | Select SN74HC237PWR when sourcing from TI's standard catalog line with identical form-fit-function and documentation (SCHS146F) |
| CD74HCT237PWR | HCT version: 4.5V–5.5V supply only; TTL-compatible inputs (VIL ≤ 0.8V, VIH ≥ 2.0V); same pinout and active-high outputs | Required only when interfacing directly to legacy 5V TTL logic without level shifters; higher ICC than HC variant | Choose CD74HCT237PWR for strict 5V TTL system integration; otherwise prefer CD74HC237PWR for wider voltage flexibility and lower power |
Compared with SN74HC237PWR, CD74HC237PWR offers identical performance but reflects Harris Semiconductor heritage and legacy part numbering; versus CD74HCT237PWR, it trades TTL input compatibility for broader 2V–6V operation and reduced static current - making it optimal for mixed-voltage or low-power designs.
Availability
CD74HC237PWR is available at Aetrix Electronics and suitable for industrial control systems, aerospace data acquisition modules, and automotive engine management units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC237PWR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of experience in high-reliability logic IC design and manufacturing.
The CD74HC237PWR belongs to TI's legacy high-speed CMOS logic family, engineered for robust address decoding and signal routing in harsh-environment applications where latch stability, wide voltage operation, and extended temperature tolerance are critical.
FAQ
What is the key functional difference between CD74HC237PWR and CD74HC137PWR?
The CD74HC237PWR provides active-high decoded outputs (Yn = HIGH when selected), whereas CD74HC137PWR delivers active-low outputs (Yn = LOW when selected). Both share identical pinout, latch enable (LE), and dual output enable (OE0/OE1) architecture, but their truth tables and output polarity are inverted - requiring different downstream logic assumptions. This distinction is explicitly defined in the SCHS146F datasheet truth tables for 'HC237 and 'HC137 variants.
Does CD74HC237PWR support operation below 2V?
No, CD74HC237PWR has a minimum specified supply voltage of 2V per its Absolute Maximum Ratings and DC Electrical Specifications. Operation below 2V is outside datasheet validation and may result in undefined output states, increased propagation delay variation, or failure to meet logic threshold guarantees. The HC family's VIH/VIL specifications are only guaranteed within the 2V–6V range.
Can CD74HC237PWR be used as a demultiplexer, and how is that configured?
Yes, CD74HC237PWR can function as a 1-to-8 demultiplexer. Configure A0–A2 as the 3-bit channel address, hold OE1 low (active), and apply the serial data signal to OE0 - the selected Yn output will mirror the OE0 input state. This configuration leverages the device's dual enable structure and is confirmed in the Functional Description section of the SCHS146F datasheet.
What is the maximum output drive capability of CD74HC237PWR?
CD74HC237PWR supports ±25 mA DC output source/sink current per pin, as specified in its Absolute Maximum Ratings. However, for reliable operation across -55°C to +125°C, the recommended steady-state output current is ≤±6 mA (based on fanout of 10 LSTTL loads and VOH/VOL limits at temperature extremes). Exceeding this may cause output voltage degradation or thermal stress in sustained operation.
Is CD74HC237PWR pin-compatible with CD74HC237PW?
Yes, CD74HC237PWR and CD74HC237PW share identical TSSOP-16 pinout, electrical characteristics, and functional behavior. The "R" suffix denotes tape-and-reel packaging (2000 pcs/reel), while "PW" indicates tube packaging (25 pcs/tube); both use the same PW package drawing, 0.65 mm pitch, and HJ237 marking. No PCB layout change is required when substituting between them.
CD74HC237PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
CD74HC237PWR FAQ
1.How can I place an order for CD74HC237PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC237PWR 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 CD74HC237PWR reliable?
The price and inventory of CD74HC237PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC237PWR is usually 5 days.
3.What payment methods are accepted for CD74HC237PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC237PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC237PWR?
CD74HC237PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC237PWR 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 CD74HC237PWR?
For technical support, including CD74HC237PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC237PWR requirements.
6.How does Aetrix verify that CD74HC237PWR is sourced from the original manufacturer or authorized distributors?
All CD74HC237PWR 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 CD74HC237PWR meets industry standards.
7.What is the process for return or replacement of CD74HC237PWR?
All CD74HC237PWR units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC237PWR, 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 CD74HC237PWR part is unused and in its original packaging.
Return procedure for CD74HC237PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD74HC237PWR 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 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…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
