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NXP Semiconductors 74HCT259D,652
- Part No.:
- 74HCT259D,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Latches
- Package:
- -
- Datasheet:
-
74HCT259D,652.pdf
- Description:
- NEXPERIA 74HCT259D - D LATCH, HC
- Quantity:
- Payment:
- Shipping:
Inventory:17,008
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Product details
Overview
74HCT259D,652 from Nexperia is an 8-bit addressable latch with TTL-compatible input levels, operating from 4.5 V to 5.5 V supply, supporting four functional modes (addressable latch, memory, 3-to-8 demultiplexing, and reset), and delivering 4.32 V VOH at 4.0 mA load - used in industrial I/O expansion and programmable logic control systems.
For engineers reviewing the 74HCT259D,652 datasheet, 74HCT259D,652 pinout, 74HCT259D,652 application, or 74HCT259D,652 equivalent, key selection criteria include its active-LOW latch enable (LE) and master reset (MR), 16-pin SO16 package compatibility, -40 °C to +125 °C temperature range, and deterministic propagation delays (e.g., 22 ns LE→Qn at VCC = 4.5 V).
Technical Context
The device implements a dual-function architecture: a parallel-access 8-bit latch array with individual output enables via A0–A2 address decoding, and a synchronous 3-to-8 active-HIGH decoder. Its conditional reset (MR) operates independently of LE state, enabling system-level initialization without disturbing latch contents during memory mode.
Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The TTL-level inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V) ensure direct compatibility with legacy 5 V logic families without level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures robust operation across standard 5 V industrial rails with ±5% tolerance. |
| Propagation delay (LE → Qn) | 22 ns typical at VCC = 4.5 V - guarantees sub-25 ns timing for high-speed address-controlled latching in microcontroller peripheral interfaces. |
| Output drive (VOH / VOL) | VOH ≥ 3.98 V @ -4.0 mA; VOL ≤ 0.26 V @ 4.0 mA - supports direct driving of CMOS/TTL loads without external buffers. |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood automotive, motor drives, and industrial PLC environments. |
| Input compatibility | TTL-level inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V) - eliminates need for level shifters when interfacing with 5 V microcontrollers or FPGAs. |
| Power dissipation | 500 mW max (SO16 package) - enables sustained operation in compact PCB layouts without forced cooling. |
Pinout & Package
74HCT259D,652 uses the SOT109-1 plastic small outline package (SO16), 16-pin, 3.9 mm body width, with gull-wing leads and pin 1 index marker. Thermal resistance θJA = 110 K/W (typical), suitable for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (A0, A1, A2) | Address inputs | Select one of eight latch outputs (Q0–Q7) in addressable mode; unused in memory/reset modes. |
| 4–7, 9–12 (Q0–Q7) | Latched output terminals | Eight independent buffered outputs; each retains state unless addressed or reset - enables selective data update. |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-impedance for noise immunity. |
| 13 (D) | Data input | Serial data source fed to selected latch or demultiplexer output; sampled on LE rising edge. |
| 14 (LE) | Latch enable (active LOW) | Edge-triggered control: falling edge captures D into addressed latch; rising edge freezes outputs in memory mode. |
| 15 (MR) | Master reset (active LOW) | Asynchronous clear: forces all Qn LOW regardless of LE or address state - critical for fail-safe initialization. |
| 16 (VCC) | Supply voltage | Primary power rail (4.5–5.5 V); decoupling capacitor (100 nF) required within 5 mm of pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Four-mode operation | Configurable as addressable latch, memory hold, 3-to-8 demux, or global reset - reduces board-level logic count in I/O expanders. |
| Input clamping diodes | Enables safe interface to signals up to VCC + 0.5 V using series resistors - simplifies mixed-voltage system design. |
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at 4.5–5.5 V - interoperates directly with legacy 5 V MCUs, CPLDs, and discrete logic. |
| ESD protection | HBM > 2000 V, CDM > 1000 V - meets industrial handling requirements without additional protection circuitry. |
| Wide temperature range | -40 °C to +125 °C operation - validated for use in motor control enclosures and outdoor automation equipment. |
Applications
| Industrial I/O Expansion | Programmable Logic Controller (PLC) Output Module |
|---|---|
|
Use Scenario: Adding 8-bit parallel output capability to a microcontroller with limited GPIOs in factory-floor sensor/actuator interfaces. IC Role / Device Role / Timing Role: Addressable latch that stores and holds output states under MCU software control; LE synchronizes updates to avoid glitches. Use Value: Enables deterministic, non-blocking output updates via A0–A2 addressing - eliminates need for 8-bit shift registers or dedicated I/O expanders. |
Use Scenario: Driving relay coils or LED status indicators in modular PLC backplanes where space and BOM count are constrained. IC Role / Device Role / Timing Role: Demultiplexer mode routes a single control signal to one of eight outputs; MR provides hardware-initiated emergency shutdown. Use Value: Reduces component count by combining latch + decoder functions - cuts PCB area and routing complexity vs. discrete 74-series alternatives. |
| Automotive Body Control Module | Test Equipment Signal Routing |
|
Use Scenario: Managing window lift, mirror fold, or lighting functions in 12 V vehicle architectures with 5 V logic domains. IC Role / Device Role / Timing Role: Memory mode retains output states during MCU sleep cycles; MR resets outputs on ignition-on transition. Use Value: Maintains safe default states (e.g., lights OFF) across power cycles without firmware intervention - improves ASIL-compliant behavior. |
Use Scenario: Selecting one of eight test points for oscilloscope or logic analyzer probing in automated production test fixtures. IC Role / Device Role / Timing Role: Addressable latch stores channel selection; D input updated via serial command stream from test controller. Use Value: Provides glitch-free, software-controllable signal routing with <25 ns update latency - accelerates test cycle time vs. mechanical switches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit addressable latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC259D,653 | CMOS-level inputs (VIH = 3.15 V min at VCC = 4.5 V); wider 2.0–6.0 V supply range | Requires level shifting when interfacing with 5 V TTL sources; better suited for mixed-supply systems | Choose for multi-rail designs where VCC may drop below 4.5 V or exceed 5.5 V |
| SN74LS259N | Bipolar TTL technology; higher ICC (40 mA typ), slower tpd (35 ns), narrower 4.75–5.25 V range | Higher power consumption and heat generation; not qualified beyond +70 °C | Choose only for legacy LS-TTL system upgrades where pinout and timing margins permit |
Compared with 74HC259D,653 and SN74LS259N, the 74HCT259D,652 uniquely balances TTL input compatibility, industrial temperature range, and low-power CMOS efficiency - making it optimal for new 5 V embedded designs requiring reliability and interoperability.
Availability
74HCT259D,652 is available at Aetrix Electronics and suitable for industrial I/O expansion, programmable logic controller modules, and automotive body control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT259D,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
Nexperia is a leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with a focus on automotive-grade reliability and energy-efficient design.
The 74HCT259 belongs to Nexperia's 74HCT logic family, engineered for seamless integration between TTL and CMOS systems in industrial and automotive control applications - emphasizing robustness, low static power, and wide operating margins.
FAQ
What is the function of the MR (Master Reset) pin?
The MR pin is an asynchronous active-LOW input that forces all eight outputs (Q0–Q7) to LOW regardless of LE, address, or data states. It overrides all other modes and requires no clock or enable timing - enabling immediate system-level reset for safety-critical applications like motor stop or emergency lighting control.
Can 74HCT259D,652 operate at 3.3 V supply?
No - the 74HCT259D,652 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, VIH and VIL thresholds fall outside guaranteed logic levels, risking metastability or incorrect latching. For 3.3 V systems, use the 74LVC259 or 74AUP259 variants instead.
How does the addressable latch mode differ from memory mode?
In addressable latch mode (LE = LOW, MR = HIGH), only the latch selected by A0–A2 follows the D input; others retain prior state. In memory mode (LE = HIGH, MR = HIGH), all outputs remain frozen - even if D or addresses change - providing transparent data retention during MCU interrupt servicing or bus arbitration.
Is the SO16 package RoHS compliant and lead-free?
Yes - the SOT109-1 (SO16) package for 74HCT259D,652 is fully RoHS compliant and lead-free, meeting EU Directive 2011/65/EU and JEDEC J-STD-609 Category 3 marking requirements. Lead finish is matte tin, with peak reflow temperature rated to 260 °C per JEDEC J-STD-020.
74HCT259D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Circuit:
- -
- Output Type:
- -
- Voltage - Supply:
- -
- Independent Circuits:
- -
- Delay Time - Propagation:
- -
- Current - Output High, Low:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HCT259D,652 FAQ
1.How can I place an order for 74HCT259D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT259D,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 74HCT259D,652 reliable?
The price and inventory of 74HCT259D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT259D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT259D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT259D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT259D,652?
74HCT259D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT259D,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 74HCT259D,652?
For technical support, including 74HCT259D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT259D,652 requirements.
6.How does Aetrix verify that 74HCT259D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT259D,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 74HCT259D,652 meets industry standards.
7.What is the process for return or replacement of 74HCT259D,652?
All 74HCT259D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT259D,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 74HCT259D,652 part is unused and in its original packaging.
Return procedure for 74HCT259D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT259D,652 Tags
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