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Nexperia USA Inc. 74AHC594PW,118
- Part No.:
- 74AHC594PW,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHC594PW,118.pdf
- Description:
- IC SHIFT REGISTER 8BIT 16-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,945
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Product details
Overview
74AHC594PW,118 from Nexperia is an 8-bit non-inverting serial-in, parallel-out shift register with independent storage register, dual positive-edge clocks (SHCP and STCP), active-low asynchronous resets (SHR and STR), and cascading serial output Q7S. It operates from 2.0 V to 5.5 V, supports -40 °C to +125 °C, and delivers tPLH/tPHL ≤ 7.8 ns at VCC = 4.5 V, CL = 50 pF - enabling high-speed LED matrix control and I/O expansion in industrial PLC modules.
For engineers reviewing the 74AHC594PW,118 datasheet, 74AHC594PW,118 pinout, 74AHC594PW,118 application, or 74AHC594PW,118 equivalent, this device serves as a robust, CMOS-level serial-to-parallel interface for microcontroller peripheral extension where independent clocking and latch isolation are required to prevent metastability during data staging.
Technical Context
The 74AHC594PW,118 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. This architecture decouples data shifting from output latching - eliminating race conditions when cascading multiple devices or driving capacitive loads like LED columns.
Its Schmitt-trigger inputs provide noise immunity against slow-rising signals, while overvoltage-tolerant inputs (up to 5.5 V) allow interfacing with mixed-voltage systems. The device features separate active-low reset lines (SHR for shift register, STR for storage register), enabling precise initialization of either stage without disturbing the other.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit serial-in, parallel-out shift register with output storage register - enables pipelined data transfer and glitch-free parallel output updates |
| Supply Voltage | 2.0 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic families without level translation |
| Propagation Delay | tPLH/tPHL ≤ 7.8 ns (VCC = 4.5 V, CL = 50 pF) - ensures reliable operation up to 70 MHz in timing-critical LED scanning |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive lighting controllers and industrial motor drives |
| Input Thresholds | VIH = 3.85 V, VIL = 1.65 V (VCC = 5.5 V); Schmitt-trigger hysteresis - rejects noise on long PCB traces or ribbon cables |
| Output Drive | ±8 mA (VOH/VOL @ VCC = 4.5 V) - directly drives standard LEDs or TTL inputs without external buffers |
| Power Dissipation | ICC ≤ 80 μA (VCC = 5.5 V, static) - suitable for low-power battery-backed I/O expanders |
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, 2, 3, 4, 5, 6, 7, 15 | Q0–Q7 | Parallel output terminals - drive LEDs, relays, or downstream logic; latched by STCP edge |
| 8 | GND | Ground reference for all internal circuitry and output drivers |
| 9 | Q7S | Serial output - connects to DS of next device for daisy-chained shift registers |
| 10 | SHR | Active-low shift register reset - clears shift register only; does not affect storage register contents |
| 11 | SHCP | Shift register clock - positive-edge triggered; advances serial data through all 8 stages |
| 12 | STCP | Storage register clock - positive-edge triggered; transfers current shift register contents to Q0–Q7 outputs |
| 13 | STR | Active-low storage register reset - clears Q0–Q7 outputs only; leaves shift register unchanged |
| 14 | DS | Serial data input - fed into stage 0 on each SHCP rising edge |
| 16 | VCC | Positive supply rail - powers both shift and storage registers and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent clocks | SHCP and STCP enable asynchronous data loading and synchronized output update - critical for eliminating output glitches during continuous shift operations |
| Separate reset controls | SHR and STR allow selective clearing of shift or storage register - essential for error recovery in communication protocols |
| Overvoltage-tolerant inputs | Accepts inputs up to 5.5 V regardless of VCC - simplifies integration with legacy 5 V systems while operating at 3.3 V |
| Schmitt-trigger inputs | Hysteresis ≥ 0.5 V (typ.) - suppresses noise-induced false triggering on slow or noisy control lines |
| High noise immunity | CMOS input structure with >40 % noise margin at VCC = 5 V - maintains reliability in EMI-prone motor drive environments |
Applications
| LED Matrix Driver | Microcontroller I/O Expander |
|---|---|
|
Use Scenario: Driving 8×8 monochrome LED displays in industrial HMI panels using SPI-controlled column scanning. IC Role / Device Role / Timing Role: Serial data from MCU shifts in via DS/SHCP; STCP strobes updated column data to Q0–Q7 outputs synchronously with row multiplexing. Use Value: Eliminates need for dedicated GPIO per LED column - reduces MCU pin count by 8× while maintaining flicker-free 1 kHz refresh rates. |
Use Scenario: Adding 8 digital output lines to an STM32-based programmable logic controller with limited native GPIO. IC Role / Device Role / Timing Role: Acts as buffered output latch; MCU streams configuration bits over SPI, then asserts STCP to atomically update all outputs. Use Value: Provides glitch-free output transitions and ±8 mA drive strength - directly interfaces with 24 V PLC input modules without external transistors. |
| Industrial Serial Bus Node | Remote Sensor Interface |
|
Use Scenario: Cascading eight 74AHC594PW,118 units to create a 64-bit output bus for distributed I/O in factory automation networks. IC Role / Device Role / Timing Role: Each device's Q7S feeds DS of the next; SHCP and STCP shared across chain for synchronized bulk updates. Use Value: Enables single-SPI-line control of 64 outputs with deterministic 64-clock-cycle latency - simplifies firmware and reduces wiring complexity. |
Use Scenario: Interfacing analog sensor ADCs with slow serial output (e.g., ADS1115) to a fast microcontroller requiring parallel-ready data. IC Role / Device Role / Timing Role: Captures ADC's serial stream into shift register; STCP latches final conversion result for parallel read by MCU. Use Value: Bridges speed mismatch between slow sensors and high-speed processors - eliminates bit-banging overhead and improves sampling consistency. |
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 |
|---|---|---|---|
| 74AHCT594PW,118 | TTL-compatible inputs (VIH = 2.0 V, VIL = 0.8 V); identical pinout and function | Better suited for legacy 5 V TTL systems; less noise margin than AHC version in mixed-signal environments | Select when interfacing with older 5 V microcontrollers or logic families lacking CMOS thresholds |
| SN74HC595PWR | Single clock (SRCLK + RCLK), no independent shift/storage resets; open-drain Q7S output | Lacks SHR/STR separation - requires software coordination to avoid partial updates; lower drive strength (±4 mA) | Prefer for cost-sensitive consumer designs where full reset independence is unnecessary |
Compared with 74AHCT594PW,118, the AHC variant offers superior noise immunity and wider voltage compatibility; versus SN74HC595PWR, it provides deterministic reset control and higher output drive - making it optimal for industrial real-time I/O staging.
Availability
74AHC594PW,118 is available at Aetrix Electronics and suitable for industrial PLCs, LED display controllers, sensor interface modules, and automotive lighting subsystems requiring stable component supply across extended temperature ranges.
Supply support for 74AHC594PW,118 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 optimized for efficiency, reliability, and miniaturization in power management and signal integrity applications.
The 74AHC594 series belongs to Nexperia's advanced logic portfolio designed specifically for high-speed, low-power serial-to-parallel data conversion in harsh industrial and automotive environments.
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 results in Q0–Q7 reflecting data shifted in during the previous STCP edge - useful for pipeline delay but unsuitable for atomic output updates. For glitch-free operation, keep clocks separate and align STCP after full shift completion.
What is the maximum recommended clock frequency?
The maximum guaranteed clock frequency is 70 MHz at VCC = 4.5 V to 5.5 V and CL = 50 pF (per datasheet Table 7). At lower VCC (3.0–3.6 V), fmax drops to 65 MHz. Exceeding these limits risks setup/hold violations, especially with heavy capacitive loads or long trace lengths.
How does the Q7S output behave during reset?
When SHR is asserted LOW, Q7S goes LOW immediately and remains LOW until SHR is deasserted and at least one SHCP edge occurs. STR assertion has no effect on Q7S - confirming strict functional isolation between shift and storage sections as documented in Table 3.
Is the TSSOP16 package RoHS-compliant and lead-free?
Yes, the 74AHC594PW,118 in SOT403-1 (TSSOP16) packaging meets RoHS Directive 2011/65/EU and is fully lead-free, with matte tin (Sn) termination finish and halogen-free molding compound - certified per Nexperia's environmental compliance documentation.
74AHC594PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74AHC594PW,118 FAQ
1.How can I place an order for 74AHC594PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC594PW,118 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 74AHC594PW,118 reliable?
The price and inventory of 74AHC594PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC594PW,118 is usually 5 days.
3.What payment methods are accepted for 74AHC594PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC594PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHC594PW,118?
74AHC594PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC594PW,118 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 74AHC594PW,118?
For technical support, including 74AHC594PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC594PW,118 requirements.
6.How does Aetrix verify that 74AHC594PW,118 is sourced from the original manufacturer or authorized distributors?
All 74AHC594PW,118 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 74AHC594PW,118 meets industry standards.
7.What is the process for return or replacement of 74AHC594PW,118?
All 74AHC594PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC594PW,118, 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 74AHC594PW,118 part is unused and in its original packaging.
Return procedure for 74AHC594PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHC594PW,118 Tags
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74HC595PW,118
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74HC165D,653
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74HC165BQ,115
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