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NXP Semiconductors 74HC237N,652
- Part No.:
- 74HC237N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC237N,652.pdf
- Description:
- IC DECODER/DEMUX 1X3:8 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,059
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Product details
Overview
74HC237N,652 from NXP Semiconductors is a high-speed Si-gate CMOS 3-to-8 line decoder/demultiplexer with integrated 3-bit address latches, pin-compatible with LSTTL. It operates from 2.0 V to 6.0 V, supports −40 °C to +125 °C ambient range, and delivers propagation delays as low as 15 ns (VCC = 6.0 V), enabling strobed address storage in bus-oriented systems.
For engineers reviewing the 74HC237N,652 datasheet, 74HC237N,652 pinout, 74HC237N,652 application, or 74HC237N,652 equivalent, key selection considerations include latch-enable timing (tsu = 9 ns, th = 5 ns at VCC = 6.0 V), dual enable control (E1 active LOW, E2 active HIGH), output drive capability (±5.2 mA at VCC = 6.0 V), and DIP16 package compatibility with legacy through-hole designs.
Technical Context
The 74HC237N,652 integrates a 3-to-8 decoder with transparent 3-bit latches controlled by LE (active LOW). When LE is LOW, inputs A0–A2 pass directly to the decoder; on LE LOW-to-HIGH transition, the last valid address is latched and held regardless of subsequent input changes.
Output enable is independently managed via E1 (active LOW) and E2 (active HIGH): all outputs go HIGH unless E1 = LOW and E2 = HIGH. Outputs are active LOW, mutually exclusive, and support 3-state system integration without overlap.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic families without level shifting. |
| Operating Temperature | −40 °C to +125 °C - qualified for industrial and extended-temperature embedded control applications. |
| Propagation Delay | 15 ns (typ, VCC = 6.0 V, An → Yn) - supports high-speed address decoding in real-time bus arbitration. |
| Output Drive | ±5.2 mA (VCC = 6.0 V) - sufficient to drive multiple TTL loads or moderate capacitive buses without buffering. |
| Input Leakage | ±1.0 µA (max, VCC = 6.0 V) - ensures stable latch state retention during long idle periods in low-power systems. |
| Power Dissipation | 750 mW (DIP16, Tamb ≤ 70 °C) - compatible with standard through-hole PCB thermal design practices. |
Pinout & Package
74HC237N,652 is supplied in a plastic dual in-line package (DIP16), SOT38-4 variant, with 300-mil lead spacing and through-hole mounting. The package meets JEDEC MS-001 and is rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (A0–A2) | Address input | 3-bit binary address lines latched on LE rising edge; determine active output Y0–Y7. |
| 4 (LE) | Latch enable | Active LOW control: LOW enables transparent input path; rising edge captures and holds current A0–A2. |
| 5 (E1) | Enable 1 | Active LOW global output enable: must be LOW for any output activation (used with E2). |
| 6 (E2) | Enable 2 | Active HIGH global output enable: must be HIGH for any output activation (used with E1). |
| 7–9, 11–15 (Y0–Y7) | Decoder outputs | Eight active LOW, mutually exclusive outputs; only one asserted per valid address when enables active. |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; required for stable latch and decode operation. |
| 16 (VCC) | Supply voltage | Positive supply rail (2.0–6.0 V); powers internal latches, decoder, and output buffers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3-bit latch + decoder | Eliminates need for external flip-flops in strobed address systems, reducing component count and board space. |
| Dual independent enable (E1/E2) | Enables hierarchical decoding and selective subsystem activation without additional gating logic. |
| Active LOW mutually exclusive outputs | Ensures single-line assertion per address, preventing bus contention in non-overlapping decoder architectures. |
| ESD protection | HBM > 2000 V and MM > 200 V - enhances robustness during handling and in electrically noisy industrial environments. |
| Multiple package options | DIP16 (74HC237N,652), SO16, and SSOP16 - supports both legacy through-hole and modern surface-mount assembly. |
Applications
| Industrial Bus Address Decoding | Strobed Memory Address Latching |
|---|---|
|
Use Scenario: Microcontroller-based PLC I/O expansion module using shared data/address bus with peripheral select strobes. IC Role / Device Role / Timing Role: Stores microcontroller address during bus cycle, then decodes to activate one of eight peripheral chip-select lines. Use Value: Enables deterministic, non-overlapping peripheral selection with precise timing control via LE pulse width (min 9 ns at VCC = 6.0 V). |
Use Scenario: 8-bit microprocessor system with banked memory requiring stable address hold during memory access cycles. IC Role / Device Role / Timing Role: Captures and holds upper address bits (A0–A2) during memory read/write, isolating address bus from transient noise. Use Value: Provides setup/hold times (tsu = 9 ns, th = 5 ns) compatible with common 8-bit MPU timing budgets at 6 MHz+ clock rates. |
| Non-Overlapping Decoder Network | Legacy TTL System Upgrade |
|
Use Scenario: Industrial controller with multi-level decoding tree where overlapping outputs would cause logic conflicts. IC Role / Device Role / Timing Role: Generates mutually exclusive active-LOW outputs to drive downstream enable lines without race conditions. Use Value: Guarantees single-output assertion per address code, eliminating need for external OR/NOR logic to enforce exclusivity. |
Use Scenario: Retrofit of obsolete 74LS237 in existing equipment requiring lower power and wider supply range. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement with identical DIP16 footprint and logic function. Use Value: Maintains full backward compatibility while reducing supply current (ICC < 160 µA vs. LS-series mA-level draw) and extending voltage range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-to-8 decoder with latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT237N,652 | TTL-compatible input thresholds (VIH = 2.0 V min), otherwise identical pinout, latch behavior, and timing. | Better suited for mixed 5 V TTL/CMOS systems where input noise margins require HCT-level thresholds. | Select when interfacing directly with legacy 74LS/74ALS outputs without level shifters. |
| SN74HC237N | Identical logic function and pinout; manufactured by Texas Instruments with same JEDEC 7A compliance and −40 °C to +125 °C rating. | No functional difference; used where TI-sourced components are preferred for supply chain diversification. | Choose for second-source assurance without redesign or qualification retesting. |
Compared with 74HC237N,652, the 74HCT237N,652 offers improved noise immunity in TTL-mixed environments, while the SN74HC237N provides identical performance with alternate manufacturing origin-both preserve latch timing, enable logic, and DIP16 mechanical fit.
Availability
74HC237N,652 is available at Aetrix Electronics and suitable for industrial bus decoding, strobed memory addressing, and non-overlapping peripheral selection requiring stable component supply across extended temperature ranges.
Supply support for 74HC237N,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 74HC237N,652 belongs to NXP's HC logic family, designed for high-speed, low-power digital control in industrial automation, programmable logic, and legacy system upgrades where pin compatibility and wide voltage operation are critical.
FAQ
What is the primary function of the 74HC237N,652?
The 74HC237N,652 is a 3-to-8 line decoder/demultiplexer with integrated 3-bit address latches. It decodes three binary inputs (A0–A2) into eight active LOW outputs (Y0–Y7) while storing the address via a latch enable (LE) signal. This allows it to hold a stable address for strobed applications such as bus-oriented systems and memory mapping, making the 74HC237N,652 ideal for deterministic peripheral selection without continuous address bus monitoring.
How does the latch enable (LE) pin operate on the 74HC237N,652?
On the 74HC237N,652, the LE pin is active LOW and controls latch transparency. When LE is LOW, the device acts as a transparent 3-to-8 decoder: A0–A2 directly determine the active output. On the LOW-to-HIGH transition of LE, the current A0–A2 values are captured and held; subsequent input changes are ignored until LE returns LOW. This behavior enables precise address strobing, and the 74HC237N,652 specifies minimum setup (9 ns) and hold (5 ns) times at VCC = 6.0 V to ensure reliable capture.
What are the voltage and temperature specifications for the 74HC237N,652?
The 74HC237N,652 operates from 2.0 V to 6.0 V supply voltage and is fully specified over an ambient temperature range of −40 °C to +125 °C. Its input thresholds scale with VCC (e.g., VIH = 3.15 V at VCC = 4.5 V), and output drive remains stable across this range (VOH ≥ 3.7 V, VOL ≤ 0.4 V at IO = ±4.0 mA). These specs make the 74HC237N,652 suitable for industrial control units, motor drives, and other extended-temperature applications where reliability under voltage variation is essential.
Can the 74HC237N,652 replace older 74LS237 devices?
Yes, the 74HC237N,652 is pin-compatible with 74LS237 and meets JEDEC standard no. 7A, allowing direct replacement in most legacy designs. It offers lower power consumption (ICC < 160 µA vs. several mA for LS), wider supply range (2.0–6.0 V vs. 4.75–5.25 V), and improved noise immunity. However, note that the 74HC237N,652 has CMOS input thresholds - for systems with marginal TTL drive strength, consider the 74HCT237N,652 variant instead. The 74HC237N,652 retains identical DIP16 footprint and functional truth table.
What package type is used for the 74HC237N,652?
The 74HC237N,652 uses a plastic dual in-line package (DIP16), designated SOT38-4, with 300-mil lead spacing and through-hole mounting. It measures 19.5 mm × 6.48 mm × 4.2 mm and features 16 leads on 0.1-inch centers. This package is optimized for prototyping, industrial control panels, and legacy PCBs requiring manual assembly or socketing - and is mechanically and electrically identical to other DIP16 logic devices like the 74HC138 or 74HC238.
74HC237N,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:
- 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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
74HC237N,652 FAQ
1.How can I place an order for 74HC237N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC237N,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 74HC237N,652 reliable?
The price and inventory of 74HC237N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC237N,652 is usually 5 days.
3.What payment methods are accepted for 74HC237N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC237N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC237N,652?
74HC237N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC237N,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 74HC237N,652?
For technical support, including 74HC237N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC237N,652 requirements.
6.How does Aetrix verify that 74HC237N,652 is sourced from the original manufacturer or authorized distributors?
All 74HC237N,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 74HC237N,652 meets industry standards.
7.What is the process for return or replacement of 74HC237N,652?
All 74HC237N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC237N,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 74HC237N,652 part is unused and in its original packaging.
Return procedure for 74HC237N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC237N,652 Tags
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