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Nexperia USA Inc. 74HCT259PW,112
- Part No.:
- 74HCT259PW,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT259PW,112.pdf
- Description:
- IC 8BIT ADDRESSABL LATCH 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,051
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Product details
Overview
74HCT259PW,112 from Nexperia is an 8-bit addressable latch with TTL-compatible inputs, operating from 4.5 V to 5.5 V, supporting four distinct modes (addressable latch, memory, 3-to-8 demultiplexing, and reset), and delivering 4.0 mA output drive at VCC = 4.5 V - used in industrial I/O expansion and LED matrix control.
For engineers reviewing the 74HCT259PW,112 datasheet, 74HCT259PW,112 pinout, 74HCT259PW,112 application, or 74HCT259PW,112 equivalent, this device serves as a serial-to-parallel interface with random-access latch control, precise timing-critical demux capability, and active-low LE/MR logic for synchronous system integration.
Technical Context
The 74HCT259PW,112 implements a dual-function architecture: a programmable 8-bit latch array with individual bit addressing via A0–A2, and a 3-to-8 decoder where D input propagates only to the selected Qn output while others remain LOW. Its mode selection relies on the logical combination of active-low LE and MR signals per Table 4.
It features TTL-level input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V at VCC = 5 V), 16-pin TSSOP package (SOT403-1), -40 °C to +125 °C operation, and ESD robustness (HBM > 2000 V, CDM > 1000 V), enabling direct interfacing with legacy microcontroller GPIOs without level shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL logic systems and avoids overvoltage stress on input clamps. |
| Output drive | ±4.0 mA at VCC = 4.5 V - sufficient to directly sink/source LEDs or drive CMOS/TTL fan-out without external buffers. |
| Propagation delay | 22 ns (LE→Qn, typ) at VCC = 4.5 V - enables reliable operation in sub-25 MHz clocked address/data strobing applications. |
| Input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - guarantees interoperability with 5 V microcontrollers and legacy TTL peripherals without level translation. |
| Operating temperature | -40 °C to +125 °C - supports deployment in automotive under-hood, industrial PLC, and outdoor embedded control environments. |
| ESD rating | HBM > 2000 V, CDM > 1000 V - reduces risk of field failure during handling and board assembly in high-static manufacturing settings. |
Pinout & Package
TSSOP16 plastic thin shrink small outline package (SOT403-1), 16 leads, body width 4.4 mm, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | Address input LSB | Selects one of eight latches or outputs; must be stable before LE transition to avoid metastability. |
| 2 (A1), 3 (A2) | Address inputs | Complete 3-bit address bus (A0–A2); determines which Qn follows D in addressable latch or demux mode. |
| 4–7, 9–12 (Q0–Q7) | Latch outputs | Eight independent buffered outputs; each retains state unless addressed or reset - no bus contention. |
| 8 (GND) | Ground reference | Primary 0 V return path; decoupling capacitor must be placed adjacent to pin 8 for noise immunity. |
| 13 (D) | Data input | Serial data source for latch loading or demux channel; sampled on LE rising edge in addressable mode. |
| 14 (LE) | Latch enable | Active-HIGH edge-triggered control; rising edge captures D into addressed latch or initiates demux action. |
| 15 (MR) | Master reset | Asynchronous active-LOW signal forcing all Qn to LOW regardless of address or data state. |
| 16 (VCC) | Supply voltage | 5 V nominal power rail; requires local 100 nF ceramic bypass capacitor between pins 8 and 16. |
Key Features
| Feature | Design Value |
|---|---|
| Four-mode operation | Configurable as addressable latch, memory hold, 3-to-8 active-HIGH decoder, or global reset - eliminates need for discrete glue logic. |
| TTL-compatible inputs | VIH/VIL thresholds match legacy 5 V TTL families, enabling direct connection to 8051, AVR, or PIC microcontrollers without level shifters. |
| Clamp diodes on all inputs | Allows safe interfacing to voltages exceeding VCC when used with current-limiting resistors - protects against overvoltage transients. |
| Low quiescent current | ICC ≤ 8 μA (typ) at VCC = 5.5 V - minimizes standby power in battery-backed or energy-sensitive I/O expander designs. |
| Industrial temperature range | Specified from -40 °C to +125 °C - validated for continuous operation in harsh thermal environments without derating. |
Applications
| LED Matrix Driver | Microcontroller I/O Expander |
|---|---|
|
Use Scenario: Driving 8×8 monochrome LED display with row/column scanning. IC Role / Device Role / Timing Role: Acts as column driver latch, holding each 8-bit column pattern while rows are sequentially activated. Use Value: Eliminates CPU overhead for bit-banging; enables flicker-free 100 Hz refresh using single LE strobe per frame. |
Use Scenario: Extending GPIO count on an STM32F103 with limited pins. IC Role / Device Role / Timing Role: Serial-to-parallel converter accepting address + data over three GPIOs (A0–A2, D, LE). Use Value: Adds eight controllable outputs using only five MCU pins, preserving UART/SPI resources for core functions. |
| Industrial Sensor Multiplexer | Legacy System Interface Adapter |
|
Use Scenario: Selecting one of eight analog sensor outputs to a shared ADC input. IC Role / Device Role / Timing Role: Functions as 3-to-8 demultiplexer, routing sensor DOUT to ADC IN based on A0–A2 address. Use Value: Reduces component count vs. discrete analog switches; provides clean digital-controlled channel isolation. |
Use Scenario: Interfacing modern FPGA I/O banks to legacy 5 V TTL backplane. IC Role / Device Role / Timing Role: Level-translating latch buffer for bidirectional control signals (e.g., chip select, interrupt ack). Use Value: Provides noise-immune, slew-rate-controlled 5 V outputs compatible with vintage peripheral timing budgets. |
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 |
|---|---|---|---|
| 74HC259PW,112 | CMOS input thresholds (VIH ≥ 3.15 V @ VCC = 4.5 V), wider 2.0–6.0 V supply range | Better suited for mixed-voltage systems (e.g., 3.3 V MCU controlling 5 V peripherals) | Select when interfacing with CMOS logic or variable-supply designs requiring >4.5 V headroom. |
| SN74LS259N | Bipolar TTL process; higher ICC (40 mA max), slower tpd (35 ns min), 4.75–5.25 V only | Requires tighter 5 V regulation; incompatible with low-power or wide-temp industrial use | Choose only for legacy LS-TTL system replacement where pinout and timing match existing PCB layout. |
Compared with 74HC259PW,112 and SN74LS259N, the 74HCT259PW,112 uniquely balances TTL input compatibility, low power, and extended temperature operation - making it optimal for new industrial designs requiring robust 5 V interfacing without bipolar power penalties.
Availability
74HCT259PW,112 is available at Aetrix Electronics and suitable for industrial I/O expansion, LED matrix control, sensor multiplexing, and legacy system interface applications requiring stable component supply across extended temperature ranges.
Supply support for 74HCT259PW,112 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 global R&D and manufacturing infrastructure focused on reliability and scalability.
The 74HCT259 belongs to Nexperia's industry-standard 74-series logic family, designed specifically for robust 5 V system interfacing, industrial control, and mixed-technology board integration where TTL compatibility and thermal resilience are critical.
FAQ
What is the function of the MR (Master Reset) pin?
The MR pin is an asynchronous active-LOW input that forces all eight Qn outputs to LOW regardless of address, data, or LE state. It overrides all other modes and does not require LE activation. When MR is HIGH, normal operation resumes immediately - no reset recovery time is specified.
Can the 74HCT259PW,112 operate at 3.3 V supply?
No - the 74HCT259PW,112 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, input thresholds (VIH ≥ 2.0 V) may still be met, but VOH/VOL, propagation delay, and output drive fall outside guaranteed specifications. Use 74HC259PW,112 for true 3.3 V compatibility.
How does the addressable latch mode differ from demultiplexer mode?
In addressable latch mode (MR = HIGH, LE = LOW), only the addressed Qn follows D; others retain prior state. In demultiplexer mode (MR = LOW, LE = LOW), the addressed Qn follows D while all others are forced LOW - no state retention occurs, making it purely combinational.
Is the TSSOP16 package lead-free and RoHS compliant?
Yes - the 74HCT259PW,112 in SOT403-1 (TSSOP16) packaging meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations. Nexperia confirms full compliance per its public declarations and material content reports dated March 2024.
74HCT259PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-TSSOP
74HCT259PW,112 FAQ
1.How can I place an order for 74HCT259PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT259PW,112 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 74HCT259PW,112 reliable?
The price and inventory of 74HCT259PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT259PW,112 is usually 5 days.
3.What payment methods are accepted for 74HCT259PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT259PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT259PW,112?
74HCT259PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT259PW,112 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 74HCT259PW,112?
For technical support, including 74HCT259PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT259PW,112 requirements.
6.How does Aetrix verify that 74HCT259PW,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT259PW,112 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 74HCT259PW,112 meets industry standards.
7.What is the process for return or replacement of 74HCT259PW,112?
All 74HCT259PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT259PW,112, 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 74HCT259PW,112 part is unused and in its original packaging.
Return procedure for 74HCT259PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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