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Nexperia USA Inc. 74HCT597D,653
- Part No.:
- 74HCT597D,653
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT597D,653.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,261
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Product details
Overview
74HCT597D,653 from Nexperia is an 8-bit parallel-in/serial-out shift register with input flip-flops, featuring separate storage and shift registers both clocked on positive edges. It supports TTL-level inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), operates from -40 °C to +125 °C, and delivers 40 ns propagation delay (SHCP to Q) at 4.5 V. It is used in industrial I/O expansion where synchronous data capture and serial streaming are required.
For engineers reviewing the 74HCT597D,653 datasheet, 74HCT597D,653 pinout, 74HCT597D,653 application, or 74HCT597D,653 equivalent, key selection criteria include its dual-clock architecture (STCP for parallel load, SHCP for serial shift), asynchronous master reset (MR), direct-load capability from storage to shift register, and SO16 package compatibility with legacy 74-series board layouts.
Technical Context
The device implements a two-stage pipeline: an 8-bit parallel input latch (D0–D7) controlled by STCP, followed by an 8-bit shift register clocked by SHCP. Data transfers from latches to shift register only when PL is low and SHCP rises - enabling synchronized sampling before serial output.
Its TTL-compatible inputs allow direct interfacing with legacy microcontroller GPIOs without level-shifting, while clamp diodes permit safe operation with input voltages exceeding VCC when current-limiting resistors are used. The MR input asynchronously clears the shift register, independent of clock edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-input CMOS-output, enabling direct connection to 5 V microcontrollers |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V digital systems; not functional below 4.5 V |
| Propagation Delay (SHCP → Q) | 23–60 ns - determines maximum serial bit rate (up to 20 MHz at 4.5 V) |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood and industrial control environments |
| Package | SO16 (SOT109-1), 3.9 mm body width - industry-standard footprint, pin-compatible with 74LS597/74HC597 |
| Input Clamp Diodes | Integrated - allows safe interface to signals up to VCC + 0.5 V using external current-limiting resistors |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - robust handling in automated assembly and field service |
Pinout & Package
74HCT597D,653 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads and 3.9 mm body width. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise convention from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 15 | D0–D7 | Parallel data inputs - sampled on rising edge of STCP into storage register |
| 8 | GND | Ground reference - must be low-impedance return path for all internal logic and output switching |
| 9 | Q | Serial data output - MSB-first output from shift register on each SHCP rising edge |
| 10 | MR | Asynchronous master reset - active LOW; forces Q = LOW regardless of clock state |
| 11 | SHCP | Shift register clock - rising edge shifts data left; DS enters LSB position |
| 12 | STCP | Storage register clock - rising edge latches D0–D7 into input flip-flops |
| 13 | PL | Parallel load control - active LOW; enables transfer from storage register to shift register |
| 14 | DS | Serial data input - fed into LSB (Q0) on next SHCP edge when PL = LOW |
| 16 | VCC | Positive supply - must be decoupled locally with ≥100 nF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Dual-edge-isolated registers | Independent STCP and SHCP clocks prevent metastability during concurrent parallel load and serial shift operations |
| TTL-compatible inputs | VIH = 2.0 V min / VIL = 0.8 V max at 5 V - eliminates need for level translators when driving from 5 V MCU ports |
| Asynchronous reset | MR pin clears shift register immediately, enabling deterministic startup or error recovery without waiting for clock edges |
| Input clamp diodes | Enable overvoltage-tolerant interfacing (e.g., 5 V signals into 3.3 V systems with series resistors) without external protection |
| Extended temperature range | Rated from -40 °C to +125 °C - suitable for motor drives, PLC modules, and outdoor industrial controllers |
Applications
| Industrial PLC I/O Expansion | Legacy Microcontroller Interface |
|---|---|
Use Scenario: Adding 8-bit parallel input capability to a PLC base unit via SPI-like serial backplane. IC Role / Device Role / Timing Role: Captures sensor status bits synchronously on STCP, then streams them serially via SHCP/Q to reduce wiring count. Use Value: Reduces PCB trace count by 7:1 versus direct parallel bus; maintains timing determinism via edge-triggered clocks. | Use Scenario: Connecting 8 mechanical switches to an 8-bit port-limited 8051 derivative without external latching. IC Role / Device Role / Timing Role: Acts as synchronous input buffer - STCP samples switch states, SHCP shifts data to MCU's UART RX pin. Use Value: Eliminates software debouncing overhead; enables hardware-synchronized sampling aligned to system clock domain. |
| Motor Control Feedback Capture | Test Fixture Data Acquisition |
Use Scenario: Reading encoder quadrature A/B and index pulses across multiple axes in real time. IC Role / Device Role / Timing Role: Latches encoder outputs on STCP (driven by system timer), then shifts captured state to host controller. Use Value: Guarantees atomic snapshot of all 8 bits - avoids skew-induced misreads during high-speed rotation. | Use Scenario: Automated functional test of assembled PCBs using boundary-scan–like parallel capture and serial readout. IC Role / Device Role / Timing Role: Parallel captures 8 test node voltages via comparators, serially reports pass/fail bits to tester controller. Use Value: Enables single-cable test interface; reduces fixture complexity and test cycle time vs. multiplexed analog reads. |
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 |
|---|---|---|---|
| 74HC597D,653 | CMOS-input version; VIH = 3.15 V min at 4.5 V - requires ≥3.15 V logic HIGH to register input | Suitable for mixed-voltage systems where upstream logic is CMOS (e.g., 3.3 V FPGA I/O) | Select when interfacing to CMOS drivers or when lower ICC (<8 μA) at 25 °C is critical |
| SN74LV595APWR | Single-register architecture (no separate storage latch); no PL pin; uses RCLK instead of STCP | Lacks atomic parallel capture - data shifts out as it's loaded; unsuitable for glitch-free sampling | Choose only for simple serial-out extension where simultaneous input capture is unnecessary |
Compared with 74HC597D,653 and SN74LV595APWR, the 74HCT597D,653 uniquely provides isolated parallel capture and serial shift stages with independent clocks - essential for deterministic sampling in real-time control loops.
Availability
74HCT597D,653 is available at Aetrix Electronics and suitable for industrial automation, motor control, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT597D,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 specializing in high-volume, high-reliability logic, discrete, and MOSFET components for automotive, industrial, and consumer applications.
The 74HCT597 belongs to Nexperia's 74HCT logic family, designed specifically to bridge legacy TTL systems with modern CMOS power efficiency while maintaining pin and functional compatibility with industry-standard 74-series functions.
FAQ
What is the minimum pulse width required on SHCP for reliable operation?
The minimum SHCP pulse width is 10 ns at VCC = 4.5 V (20 ns at VCC = 2.0 V). This ensures proper internal state transition and avoids metastability. Pulse widths below this threshold may cause skipped shifts or undefined output behavior, especially under temperature extremes or voltage droop conditions.
Can 74HCT597D,653 operate with a 3.3 V supply?
No - the 74HCT597 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, input thresholds (VIH = 2.0 V min) become non-compliant, and propagation delays increase beyond guaranteed limits. For 3.3 V systems, use 74LVC595 or 74AUP1G57-based solutions instead.
How does the PL (parallel load) signal interact with ongoing shift operations?
When PL is LOW, the next rising edge of SHCP loads the current contents of the storage register (D0–D7) into the shift register - overriding any prior serial data. This occurs independently of MR or clock phase, enabling mid-shift data injection without resetting the entire chain.
Is the Q output three-state capable?
No - the Q output is push-pull and always driven. There is no output enable (OE) pin. To isolate Q from downstream logic, external gating (e.g., 74HCT125) or series resistance must be used. This differs from shift registers like 74HC165 which offer true three-state outputs.
74HCT597D,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:
- Shift Register
- Output Type:
- Push-Pull
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Parallel or Serial to Serial
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74HCT597D,653 FAQ
1.How can I place an order for 74HCT597D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT597D,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 74HCT597D,653 reliable?
The price and inventory of 74HCT597D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT597D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT597D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT597D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT597D,653?
74HCT597D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT597D,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 74HCT597D,653?
For technical support, including 74HCT597D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT597D,653 requirements.
6.How does Aetrix verify that 74HCT597D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT597D,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 74HCT597D,653 meets industry standards.
7.What is the process for return or replacement of 74HCT597D,653?
All 74HCT597D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT597D,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 74HCT597D,653 part is unused and in its original packaging.
Return procedure for 74HCT597D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT597D,653 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.
-
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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