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Nexperia USA Inc. 74HCT259D,653
- Part No.:
- 74HCT259D,653
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT259D,653.pdf
- Description:
- IC ADDRESSABLE LATCH 8BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,713
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Product details
Overview
74HCT259D,653 from Nexperia is an 8-bit addressable latch with TTL-compatible inputs, operating from 4.5 V to 5.5 V, 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,653 datasheet, 74HCT259D,653 pinout, 74HCT259D,653 application, or 74HCT259D,653 equivalent, key selection criteria include TTL-level input compatibility, -40 °C to +125 °C operation, SO16 package thermal performance, and precise timing for synchronous latch enable (LE) and master reset (MR) control.
Technical Context
The device implements a dual-function architecture: as an addressable latch, it uses A0–A2 to select one of eight Q outputs to follow D input while retaining others' states; as a 3-to-8 decoder/demultiplexer, it routes D to a single Q output (active HIGH) with all others LOW. Mode selection is determined solely by LE and MR logic levels per Table 4.
Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.0 V) ensure direct interfacing with legacy 5 V microcontrollers and FPGAs, while its 17 ns typical propagation delay (D→Qn, VCC = 4.5 V) supports reliable timing in synchronous digital subsystems with ≤20 MHz clock domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V logic rails and avoids level-shifting in mixed-voltage systems. |
| Input logic type | TTL-level - accepts 0.8 V max low and 2.0 V min high, enabling direct connection to 74LS/74F families without interface circuitry. |
| Propagation delay | 23 ns typ (D→Qn, VCC = 4.5 V) - supports reliable data capture in 20 MHz synchronous bus cycles with margin. |
| Output drive | ±4.0 mA (VOH/VOL) - sufficient to drive multiple 74HCT inputs or small LED loads without external buffers. |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and power supply control environments. |
| Power dissipation | 500 mW max (SO16 package) - enables stable operation in compact enclosures with natural convection cooling. |
| ESD rating | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 Level 2 requirements for board-level robustness. |
Pinout & Package
74HCT259D,653 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads, 3.9 mm body width, and gull-wing leads suitable for reflow soldering. Pin 1 index is marked by a notch or bevel on the package top edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 (A0, A1, A2) | Address inputs | Select one of eight latches or outputs; decoded internally to enable single-bit write or demux routing. |
| 4–7, 9–12 (Q0–Q7) | Latch outputs | Eight independent CMOS outputs; each retains state unless selected in addressable mode or reset. |
| 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 for latch loading or demultiplexed output; sampled on LE rising edge. |
| 14 (LE) | Latch enable | Active-HIGH edge-triggered control: rising edge captures D into addressed latch or initiates demux action. |
| 15 (MR) | Master reset | Active-LOW asynchronous reset: forces all Q outputs LOW regardless of other inputs or mode. |
| 16 (VCC) | Supply voltage | +4.5 V to +5.5 V power rail; decoupling capacitor (100 nF) required within 10 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Four-mode operation | Single IC replaces discrete latch + decoder + reset logic - reduces BOM count and PCB area in I/O expanders. |
| Addressable latch mode | Random-access write to individual bits (Q0–Q7) using only three address lines - ideal for configuration register updates. |
| Demultiplexer mode | 3-to-8 active-HIGH decoding with D as data source - eliminates need for separate 74LS138 + buffer in signal routing. |
| Common reset (MR) | Asynchronous, pin-level reset clears all outputs without requiring clock or address sequencing - critical for fail-safe startup. |
| TTL-compatible inputs | Direct interface with legacy 5 V microcontrollers (e.g., 8051, PIC18F), FPGAs, and industrial PLC outputs. |
Applications
| Industrial I/O Expansion | Programmable Logic Control |
|---|---|
|
Use Scenario: Adding 8-bit parallel output capability to a microcontroller with limited GPIO, such as in motor driver interface boards. IC Role / Device Role: Addressable latch storing control bits for stepper direction, enable, and fault clear signals. Use Value: Enables single-byte writes to update any subset of outputs without disturbing others - reducing firmware complexity and bus traffic. |
Use Scenario: Implementing configurable output mapping in a modular PLC backplane where field I/O modules require dynamic assignment. IC Role / Device Role: Demultiplexer routing system command signals (e.g., "start", "stop", "reset") to specific peripheral slots. Use Value: Eliminates manual jumper configuration; allows runtime reassignment via address lines - improving commissioning flexibility. |
| Embedded System Configuration Registers | Legacy Bus Interface Adapter |
|
Use Scenario: Storing nonvolatile configuration bits (e.g., sensor calibration mode, communication protocol selection) in battery-backed systems. IC Role / Device Role: Memory mode retention holding settings across power cycles when LE and MR are held HIGH. Use Value: Provides deterministic state recovery after brownout without EEPROM access latency or wear-out concerns. |
Use Scenario: Bridging a 5 V TTL data bus (e.g., ISA or custom parallel interface) to modern low-voltage logic or FPGA I/O banks. IC Role / Device Role: Level-translating latch buffering and synchronizing burst data transfers between mismatched voltage domains. Use Value: Maintains signal integrity and timing margins during handshaking, avoiding metastability in asynchronous crossings. |
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), wider 2.0–6.0 V supply range | Better suited for mixed-supply systems (e.g., 3.3 V MCU controlling 5 V peripherals) | Select when interfacing with CMOS or wide-VCC sources; verify input threshold compatibility with driving device. |
| SN74HCT259N | DIP-16 through-hole package; identical electrical specs but no thermal pad or lead-free compliance | Preferred for prototyping, educational labs, or legacy through-hole assembly lines | Choose for breadboard evaluation or repair of legacy equipment where SO16 rework is impractical. |
Compared with 74HC259D,653, the 74HCT259D,653 offers guaranteed TTL-level input compatibility at 5 V, simplifying interface design with older logic families, while SN74HCT259N provides mechanical interchangeability in through-hole layouts but lacks industrial-grade packaging and thermal performance.
Availability
74HCT259D,653 is available at Aetrix Electronics and suitable for industrial I/O expansion, programmable logic control, embedded configuration registers, and legacy bus interface adapter designs requiring stable component supply across extended temperature ranges.
Supply support for 74HCT259D,653 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 global semiconductor expert focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HCT259 belongs to Nexperia's industry-standard 74HCT logic family, designed specifically to provide TTL-compatible input thresholds and robust 5 V operation in space-constrained industrial control and automation systems.
FAQ
What is the difference between 74HCT259D and 74HC259D?
The 74HCT259D features TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 5 V), enabling direct interface with legacy 5 V TTL logic, while the 74HC259D uses CMOS thresholds (VIH ≥ 3.15 V) and supports a wider 2.0–6.0 V supply range. Both share identical pinout, function table, and SO16 packaging.
Can 74HCT259D,653 operate reliably at 125 °C ambient?
Yes - the 74HCT259D,653 is fully specified from -40 °C to +125 °C per JEDEC JESD7A, with validated static and dynamic parameters including VOH ≥ 3.7 V and tpd ≤ 59 ns at maximum temperature and VCC = 4.5 V, ensuring robust operation in under-hood automotive and industrial power electronics.
How does the reset (MR) pin behave during power-up?
The MR pin is active LOW and asynchronous: asserting MR LOW at any time forces all Q outputs LOW immediately, overriding address, data, and latch enable states. During power-up, MR should be held HIGH (via pull-up) until VCC stabilizes to prevent spurious resets - typical minimum VCC for reliable MR release is 3.0 V.
Is the SO16 package (SOT109-1) RoHS-compliant and lead-free?
Yes - the 74HCT259D,653 in SO16 (SOT109-1) packaging is RoHS-compliant and lead-free per Nexperia's product documentation (Rev. 9, March 2024), with termination finish specified as matte tin (Sn) over nickel (Ni) on copper leadframe, qualified for standard Pb-free reflow profiles (JEDEC J-STD-020).
74HCT259D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- D-Type, Addressable
- Circuit:
- 1:8
- Output Type:
- Standard
- Voltage - Supply:
- 4.5V ~ 5.5V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 20ns
- Current - Output High, Low:
- 4mA, 4mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74HCT259D,653 FAQ
1.How can I place an order for 74HCT259D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT259D,653 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,653 reliable?
The price and inventory of 74HCT259D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT259D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT259D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT259D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT259D,653?
74HCT259D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT259D,653 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,653?
For technical support, including 74HCT259D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT259D,653 requirements.
6.How does Aetrix verify that 74HCT259D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT259D,653 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,653 meets industry standards.
7.What is the process for return or replacement of 74HCT259D,653?
All 74HCT259D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT259D,653, 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,653 part is unused and in its original packaging.
Return procedure for 74HCT259D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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