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NXP Semiconductors 74HC597D/AUJ
- Part No.:
- 74HC597D/AUJ
- Manufacturer:
- NXP Semiconductors
- Category:
- Shift Registers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HC597D/AUJ.pdf
- Description:
- IC SHIFT REGISTER 8BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,663
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Product details
Overview
74HC597D/AUJ from Nexperia is an 8-bit parallel-in, serial-out shift register with input flip-flops and dual positive-edge-triggered clocks (STCP for storage register, SHCP for shift register). It features asynchronous master reset (MR), parallel load (PL), and serial data input (DS), operating across 2.0 V to 6.0 V supply. It is used in industrial I/O expansion, LED matrix controllers, and microcontroller peripheral interfacing where synchronized parallel capture and serial streaming are required.
For engineers reviewing the 74HC597D/AUJ datasheet, 74HC597D/AUJ pinout, 74HC597D/AUJ application, or 74HC597D/AUJ equivalent, this page delivers verified functional architecture, SO16 package details, timing-critical setup/hold constraints, and validated alternatives for embedded control and data serialization designs.
Technical Context
The 74HC597D/AUJ implements a two-stage pipeline: an 8-bit parallel input latch (D0–D7) feeding an 8-bit shift register, both clocked on rising edges but with independent controls (STCP loads latched data into shift register; SHCP shifts serial output Q). PL enables synchronous parallel-to-shift transfer while MR asynchronously clears the shift register.
Its CMOS logic ensures TTL-compatible inputs only for the 74HCT597 variant; the 74HC597D/AUJ uses CMOS-level inputs (VIH ≥ 70% VCC, VIL ≤ 30% VCC). Input clamp diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used - critical for mixed-voltage system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 2.0 V to 6.0 V - supports direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Propagation delay (SHCP to Q) | 16 ns (typ) at VCC = 6.0 V - enables reliable 24 MHz+ serial data rates in high-speed digital control loops. |
| Maximum clock frequency | 104 MHz (max) at VCC = 6.0 V - suitable for real-time sensor data aggregation and fast display refresh cycles. |
| Input leakage current | ±0.1 μA (max) at VCC = 6.0 V - minimizes power budget impact in battery-powered remote I/O nodes. |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood industrial automation and motor drive control environments. |
| ESD protection | HBM > 2000 V, CDM > 1000 V - reduces field failure risk during manual handling and PCB assembly. |
| Power dissipation capacitance | 29 pF - enables accurate dynamic power estimation (PD = CPD × VCC² × fi × N) for thermal design. |
Pinout & Package
74HC597D/AUJ is supplied in SO16 (SOT109-1) plastic small outline package: 16-pin, 3.9 mm body width, gull-wing leads, JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 15 | D0–D7 | Parallel data inputs - sampled on STCP rising edge; enable simultaneous acquisition of 8-bit sensor or status bus. |
| 8 | GND | Ground reference - must be low-impedance connection to minimize switching noise coupling into internal registers. |
| 9 | Q | Serial data output - LSB-first shifted output synchronized to SHCP; drives next stage or MCU UART RX. |
| 10 | MR | Asynchronous master reset - active LOW; forces Q = LOW regardless of clock state, enabling deterministic startup or fault recovery. |
| 11 | SHCP | Shift register clock - rising-edge triggered; controls bit-rate of serial output stream; requires clean, monotonic transitions. |
| 12 | STCP | Storage register clock - rising-edge triggered; latches D0–D7 into internal flip-flops prior to shift operation. |
| 13 | PL | Parallel load control - active LOW; transfers data from D0–D7 directly into shift register, bypassing storage register staging. |
| 14 | DS | Serial data input - feeds new bit into MSB position on each SHCP rising edge; used for daisy-chained configurations. |
| 16 | VCC | Supply voltage - decoupling capacitor (100 nF) required within 5 mm of pin to suppress supply rail transients during switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent clock domains | STCP and SHCP allow asynchronous capture and controlled serialization - essential for jitter-tolerant data buffering between mismatched clock domains. |
| Input clamp diodes | Enable safe interfacing to signals up to VCC + 0.5 V using external current-limiting resistors - eliminates need for discrete clamping in mixed-voltage systems. |
| CMOS-level input thresholds | VIH ≥ 3.15 V (at VCC = 4.5 V) ensures robust noise immunity in electrically noisy industrial enclosures. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events on I/O lines. |
| Wide temperature qualification | Specified from -40 °C to +125 °C - supports deployment in uncontrolled ambient environments such as factory floors and outdoor control cabinets. |
Applications
| Industrial I/O Expansion | LED Matrix Controller |
|---|---|
Use Scenario: Adding 8-bit parallel input capability to a microcontroller with limited GPIO, such as reading push-button banks or sensor status bits in PLC modules. IC Role / Device Role / Timing Role: Acts as a synchronized input serializer - captures parallel D0–D7 on STCP, then streams bits serially via Q on SHCP for MCU SPI input. Use Value: Reduces required MCU pins from 8 to 3 (CLK, LOAD, DATA), simplifying layout and enabling modular I/O board design. | Use Scenario: Driving 8×8 monochrome LED displays using row/column multiplexing with minimal MCU overhead. IC Role / Device Role / Timing Role: Serially receives column data from MCU via DS/Q chain, then latches full 8-bit column pattern on PL/STCP for simultaneous row activation. Use Value: Enables flicker-free 120 Hz refresh with precise timing control - critical for high-brightness industrial HMI panels. |
| Microcontroller Peripheral Interface | Sensor Data Aggregation |
Use Scenario: Interfacing legacy parallel-output sensors (e.g., ADCs, encoders) to modern ARM Cortex-M MCUs lacking native parallel bus support. IC Role / Device Role / Timing Role: Bridges parallel sensor output to MCU's USART or bit-banged serial port using STCP/SHCP coordination. Use Value: Eliminates need for FPGA or dedicated ASIC - lowers BOM cost and design cycle time for retrofit applications. | Use Scenario: Consolidating readings from multiple analog sensors (temperature, pressure, humidity) into a single serial stream for wireless transmission. IC Role / Device Role / Timing Role: Parallel-samples all sensor outputs simultaneously on STCP, then shifts out consolidated data via Q for RF module input. Use Value: Ensures time-aligned sampling across channels - preserves phase relationships critical for vibration analysis and predictive maintenance algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit parallel-in, serial-out shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT597D | TTL-compatible inputs (VIH = 2.0 V min); identical pinout, timing, and function. | Better suited for mixed 5 V TTL/CMOS systems where input signal swing may not reach 70% VCC. | Select 74HCT597D when interfacing with legacy 5 V TTL logic families; otherwise, 74HC597D/AUJ offers superior noise margin in pure CMOS designs. |
| SN74LV595A | Single-stage shift register (no input latches); open-drain output option; different pin mapping (e.g., OE instead of MR). | Lacks asynchronous reset and dual-register architecture - unsuitable for applications requiring glitch-free parallel capture before shifting. | Choose SN74LV595A only for cost-sensitive, low-power 3.3 V-only systems without strict timing isolation requirements between capture and shift phases. |
Compared with 74HCT597D and SN74LV595A, the 74HC597D/AUJ uniquely provides CMOS-input noise immunity, guaranteed asynchronous reset, and true two-stage pipelining - making it the preferred choice for deterministic, high-reliability industrial data acquisition where input synchronization integrity is non-negotiable.
Availability
74HC597D/AUJ is available at Aetrix Electronics and suitable for industrial I/O expansion, LED matrix controllers, microcontroller peripheral interfaces, and sensor data aggregation requiring stable component supply across extended temperature ranges.
Supply support for 74HC597D/AUJ 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, reliable logic, discrete, and MOSFET solutions optimized for efficiency and miniaturization.
The 74HC597D/AUJ belongs to Nexperia's HC-series high-speed CMOS logic family, engineered for robust industrial control applications demanding wide supply range, high noise immunity, and extended temperature operation.
FAQ
What is the maximum clock frequency supported by the 74HC597D/AUJ?
The 74HC597D/AUJ supports a maximum SHCP clock frequency of 104 MHz at VCC = 6.0 V and CL = 50 pF. At 4.5 V, the max frequency is 87 MHz. These values assume proper PCB layout, decoupling, and signal integrity - actual system-level performance may be lower due to trace inductance and load capacitance.
Does the 74HC597D/AUJ have an output enable (OE) pin?
No, the 74HC597D/AUJ does not include an output enable (OE) pin. Its Q output is always active when powered. To isolate the output, external gating (e.g., tri-state buffer) or system-level control of SHCP/PL/MR is required. This differs from variants like 74HC595 which integrate OE functionality.
Can the 74HC597D/AUJ operate reliably at 3.3 V supply?
Yes, the 74HC597D/AUJ is fully specified for operation at 3.3 V (within its 2.0 V–6.0 V range). At VCC = 3.3 V, VIH is guaranteed ≥ 2.31 V and VIL ≤ 0.99 V, providing 0.8 V noise margin - sufficient for most 3.3 V CMOS systems. Propagation delay increases to ~25 ns (typ) at this voltage.
How does the PL (parallel load) pin interact with STCP and SHCP in the 74HC597D/AUJ?
In the 74HC597D/AUJ, PL is active LOW and overrides normal STCP behavior: when PL = LOW and MR = HIGH, data from D0–D7 is transferred directly into the shift register on the next STCP rising edge - bypassing the storage register stage. This enables immediate serialization without intermediate latching, useful for low-latency streaming modes.
Is the 74HC597D/AUJ pin-compatible with the 74HC165 shift register?
No, the 74HC597D/AUJ is not pin-compatible with the 74HC165. While both are 8-bit parallel-in, serial-out devices, they differ in pin assignment: 74HC165 uses CLK for shift clock and CLKINH for clock inhibit, whereas 74HC597D/AUJ uses SHCP and STCP. Additionally, 74HC165 lacks PL and has different reset behavior - PCB redesign is required for substitution.
74HC597D/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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:
- Parallel to Serial
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74HC597D/AUJ FAQ
1.How can I place an order for 74HC597D/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC597D/AUJ 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 74HC597D/AUJ reliable?
The price and inventory of 74HC597D/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC597D/AUJ is usually 5 days.
3.What payment methods are accepted for 74HC597D/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC597D/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC597D/AUJ?
74HC597D/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC597D/AUJ 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 74HC597D/AUJ?
For technical support, including 74HC597D/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC597D/AUJ requirements.
6.How does Aetrix verify that 74HC597D/AUJ is sourced from the original manufacturer or authorized distributors?
All 74HC597D/AUJ 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 74HC597D/AUJ meets industry standards.
7.What is the process for return or replacement of 74HC597D/AUJ?
All 74HC597D/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74HC597D/AUJ, 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 74HC597D/AUJ part is unused and in its original packaging.
Return procedure for 74HC597D/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC597D/AUJ Tags
-
SN74HC164DR
Texas Instruments
-
SN74HC595DR
Texas Instruments
-
74HC595PW,118
Nexperia USA Inc.
-
SN74HC165PWR
Texas Instruments
-
HEF4094BT,653
Nexperia USA Inc.
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74HC595D,118
Nexperia USA Inc.
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SN74HC595PWR
Texas Instruments
-
74HC165D,653
Nexperia USA Inc.
-
SN74LV165APWR
Texas Instruments
-
74HC595BQ,115
Nexperia USA Inc.
-
74HC165BQ,115
Nexperia USA Inc.
-
CD4094BPWR
Texas Instruments
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