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Nexperia USA Inc. 74AHCT594PW,112
- Part No.:
- 74AHCT594PW,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT594PW,112.pdf
- Description:
- IC SHIFT REGISTER 8BIT 16-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,319
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Product details
Overview
74AHCT594PW,112 from Nexperia is an 8-bit serial-in, parallel-out shift register with independent storage register, TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), dual positive-edge clocks (SHCP and STCP), and active-low asynchronous resets (SHR, STR). It operates from 4.5 V to 5.5 V across –40 °C to +125 °C and enables cascaded serial-to-parallel data conversion in LED matrix drivers and industrial I/O expanders.
For engineers reviewing the 74AHCT594PW,112 datasheet, 74AHCT594PW,112 pinout, 74AHCT594PW,112 application, or 74AHCT594PW,112 equivalent, key selection criteria include TTL-level input compatibility, separate shift/storage clock timing control, Q7S serial cascade output, and TSSOP16 thermal performance at 125 °C ambient.
Technical Context
The device integrates two synchronous stages: a 8-stage shift register accepting serial data (DS) on SHCP rising edges, and an 8-bit D-type storage register loaded on STCP rising edges. Independent SHR and STR inputs asynchronously clear each stage without affecting the other, enabling precise pipeline control in buffered data transfer systems.
Input thresholds are fixed for TTL logic (VIH ≥ 2.0 V, VIL ≤ 0.8 V), ensuring interoperability with legacy 5 V microcontrollers and FPGAs. Propagation delays are tightly balanced: tPLH/tPHL ≤ 7.8 ns (CL = 50 pF, VCC = 5 V), supporting reliable operation up to 160 MHz clock frequency on both SHCP and STCP inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74AHCT - TTL-compatible CMOS, enabling direct interface with 5 V LSTTL systems without level translation. |
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across industrial 5 V rails with ±10 % tolerance. |
| Operating Temperature | –40 °C to +125 °C - Qualified for under-hood automotive and high-temp industrial control applications. |
| Max Clock Frequency | 160 MHz (SHCP/STCP) - Supports high-speed serial loading and parallel latching in real-time display controllers. |
| Propagation Delay | ≤ 7.8 ns (tPLH/tPHL, CL = 50 pF, VCC = 5 V) - Enables sub-10 ns timing margins in synchronous pipelines. |
| Output Drive | ±8 mA (VOH/VOL @ VCC = 5 V) - Sufficient to directly drive LEDs or standard CMOS/TTL inputs without buffering. |
| Input Clamping | Overvoltage tolerant to 5.5 V - Allows safe interfacing with hot-swap or mixed-voltage signal sources. |
Pinout & Package
TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width, 0.65 mm pitch, 1.2 mm max height - optimized for high-density PCB layouts with enhanced thermal dissipation vs. SO16.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 15 | Q0–Q7 | Parallel output terminals from storage register - drive external loads (e.g., LED segments, GPIO expanders) only after STCP edge. |
| 8 | GND | Ground reference for all internal logic and output stages - must be low-impedance for noise immunity. |
| 9 | Q7S | Serial output of final shift register stage - enables daisy-chaining multiple 74AHCT594 devices. |
| 10 | SHR | Active-low asynchronous reset for shift register only - clears shift stages independently of storage register state. |
| 11 | SHCP | Positive-edge-triggered clock for shift register - advances DS bit into stage 0 and shifts existing bits right. |
| 12 | STCP | Positive-edge-triggered clock for storage register - transfers current shift register contents to Q0–Q7 outputs. |
| 13 | STR | Active-low asynchronous reset for storage register only - clears Q0–Q7 outputs without disturbing shift register. |
| 14 | DS | Serial data input - sampled on SHCP rising edge; synchronized to shift register pipeline. |
| 16 | VCC | Primary power supply (4.5–5.5 V) - powers both shift and storage logic; decoupling required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent clocks | SHCP and STCP allow asynchronous shift and latch operations - eliminates race conditions when updating display buffers. |
| Separate asynchronous resets | SHR and STR enable selective clearing of shift or storage stages - critical for error recovery in communication protocols. |
| TTL-compatible inputs | VIH = 2.0 V, VIL = 0.8 V - ensures robust interfacing with legacy 5 V MCUs, PLDs, and logic families without pull-ups or translators. |
| Overvoltage-tolerant inputs | Accepts signals up to 5.5 V regardless of VCC - simplifies system-level ESD protection and mixed-voltage board design. |
| High noise immunity | Input hysteresis (Schmitt-trigger action) suppresses false triggering from noisy industrial environments. |
Applications
| LED Matrix Display Driver | Industrial I/O Expander |
|---|---|
|
Use Scenario: Driving 8×8 monochrome LED arrays in factory HMIs where microcontroller GPIO is limited. IC Role / Device Role / Timing Role: Serially receives column scan data via DS/SHCP, then latches full row output on STCP to illuminate one row at a time. Use Value: Reduces MCU pin count from 16 (direct drive) to 3 (DS, SHCP, STCP) while maintaining 160 MHz update rate for flicker-free display. |
Use Scenario: Adding 8 digital outputs to a PLC module using a single SPI bus line. IC Role / Device Role / Timing Role: Shifts command bytes from master controller, then asserts STCP to atomically update all 8 outputs without glitching. Use Value: Enables deterministic, jitter-free output updates synchronized to STCP - essential for safety-critical actuator control. |
| Cascaded Data Acquisition Node | Remote Control Signal Latch |
|
Use Scenario: Aggregating sensor status bits from 4 remote nodes into a single 32-bit parallel word for upstream processing. IC Role / Device Role / Timing Role: Each node uses Q7S to feed next device's DS; final device outputs full 32-bit word on Q0–Q7 after four STCP pulses. Use Value: Eliminates need for multiplexers or additional logic; supports daisy-chain topology with minimal wiring and timing skew. |
Use Scenario: Holding IR remote button press states in battery-powered smart home remotes until MCU wakes to read. IC Role / Device Role / Timing Role: Captures debounced button signals serially during sleep mode, then freezes state in storage register until wake-up STCP pulse. Use Value: Low quiescent current (ICC ≤ 40 μA) preserves battery life; STR allows instant reset on power-on or error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial-in/parallel-out shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHC594PW,112 | CMOS input thresholds (VIH = 3.85 V @ VCC = 5.5 V); wider 2.0–5.5 V supply range. | Requires level-shifting when interfacing with 3.3 V MCU driving 5 V logic; better for mixed-supply systems. | Select when system uses diverse voltage domains or needs lowest ICC (< 4 μA typical). |
| SN74HC595PWR | Single clock (SRCLK + RCLK), no independent SHR/STR; open-drain Q7S; 2–6 V supply. | Lacks independent shift/storage control - unsuitable for applications requiring asynchronous register isolation. | Prefer for cost-sensitive, non-critical timing designs where pin count and simplicity outweigh functional granularity. |
Compared with 74AHC594PW,112 and SN74HC595PWR, the 74AHCT594PW,112 uniquely delivers TTL-level compatibility, dual-clock determinism, and 125 °C operation - making it the only choice for automotive display modules and industrial controllers demanding guaranteed timing and robust 5 V interfacing.
Availability
74AHCT594PW,112 is available at Aetrix Electronics and suitable for LED display drivers, industrial I/O expansion, cascaded sensor nodes, and remote control latching applications requiring stable component supply over extended temperature ranges.
Supply support for 74AHCT594PW,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 global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
The 74AHCT series targets legacy 5 V system upgrades, providing TTL-compatible CMOS logic with enhanced speed, noise immunity, and thermal ruggedness - specifically engineered for industrial control and automotive infotainment interfaces.
FAQ
Can SHCP and STCP be tied together?
Yes, but doing so causes the shift register to always lead the storage register by one clock cycle. This behavior is documented in the datasheet and may result in unintended output transitions if not accounted for in firmware timing. For deterministic control, use separate clocks with intentional phase offset.
What is the function of Q7S in cascade configurations?
Q7S outputs the bit shifted out of the eighth stage (Q7) of the shift register. When cascading, Q7S connects to the DS input of the next 74AHCT594, enabling seamless 16-, 24-, or N×8-bit serial chains without external logic or glue components.
How does SHR differ from STR in fault recovery?
SHR clears only the shift register (stopping incoming data flow), while STR clears only the storage register outputs (Q0–Q7). This allows independent recovery: e.g., hold current display (STR inactive) while flushing corrupted serial stream (SHR active), then reload cleanly.
Is the TSSOP16 package suitable for reflow soldering?
Yes - the SOT403-1 (TSSOP16) package is qualified for standard lead-free reflow profiles per JEDEC J-STD-020. Its 0.65 mm pitch and exposed pad variant (not used here) support automated assembly; thermal resistance is 150 K/W junction-to-air, validated for 125 °C operation.
74AHCT594PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Shift Register
- Output Type:
- Push-Pull
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Serial to Parallel, Serial
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74AHCT594PW,112 FAQ
1.How can I place an order for 74AHCT594PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT594PW,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 74AHCT594PW,112 reliable?
The price and inventory of 74AHCT594PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT594PW,112 is usually 5 days.
3.What payment methods are accepted for 74AHCT594PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT594PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT594PW,112?
74AHCT594PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT594PW,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 74AHCT594PW,112?
For technical support, including 74AHCT594PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT594PW,112 requirements.
6.How does Aetrix verify that 74AHCT594PW,112 is sourced from the original manufacturer or authorized distributors?
All 74AHCT594PW,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 74AHCT594PW,112 meets industry standards.
7.What is the process for return or replacement of 74AHCT594PW,112?
All 74AHCT594PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT594PW,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 74AHCT594PW,112 part is unused and in its original packaging.
Return procedure for 74AHCT594PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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