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Nexperia USA Inc. 74HCT597D,652
- Part No.:
- 74HCT597D,652
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT597D,652.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,327
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Product details
Overview
74HCT597D,652 from Nexperia is an 8-bit parallel-in, serial-out shift register with integrated input flip-flops and dual edge-triggered clocks (STCP for storage, SHCP for shifting). It operates at 4.5 V to 5.5 V, supports TTL-level inputs, features asynchronous master reset (MR), parallel load (PL), and serial data output (Q), and is used in industrial I/O expansion and microcontroller peripheral interfacing where synchronous data capture and serial transmission are required.
For engineers reviewing the 74HCT597D,652 datasheet, 74HCT597D,652 pinout, 74HCT597D,652 application, or 74HCT597D,652 equivalent, this device is selected for its dual-clock architecture enabling independent latching and shifting, robust noise immunity, guaranteed operation from –40 °C to +125 °C, and SO16 packaging compatible with standard PCB assembly processes.
Technical Context
The 74HCT597D,652 implements a two-stage pipeline: an 8-bit parallel storage register (clocked by STCP) feeds a serial shift register (clocked by SHCP), both triggered on the LOW-to-HIGH transition. The storage register captures parallel data (D0–D7) synchronously, while the shift register transfers that data serially via Q under SHCP control.
It includes active-low asynchronous MR (clears shift register), active-low PL (loads storage register from Dn inputs), and DS (serial data input). Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit parallel-in, serial-out shift register with input latches and dual clocks |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL logic systems and stable operation across industrial temperature range |
| Input Logic Level | TTL-compatible - accepts 2.0 V min HIGH and 0.8 V max LOW, simplifying interface with legacy microcontrollers and logic families |
| Propagation Delay (SHCP to Q) | 23 ns (typ) at VCC = 4.5 V - enables reliable 20 MHz serial data rates in high-speed digital control loops |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive auxiliary modules and industrial motor drives |
| Package | SO16 (SOT109-1), 3.9 mm body width - surface-mount package with industry-standard footprint and thermal performance up to 500 mW |
| ESD Protection | HBM >2000 V, CDM >1000 V - provides robust handling tolerance during automated assembly and field service |
Pinout & Package
74HCT597D,652 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; the package is RoHS-compliant and rated for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–7, 15 | D0–D7 parallel data inputs | Accept 8-bit parallel word on STCP rising edge; TTL-level compatible with microcontroller GPIO or bus drivers |
| 8 | GND | Reference ground for all internal logic and I/O; must be low-impedance connection to minimize noise coupling |
| 9 | Q | Serial data output - LSB-first shifted output synchronized to SHCP; drives standard CMOS/TTL loads |
| 10 | MR | Asynchronous master reset (active LOW) - clears shift register contents independently of clock edges |
| 11 | SHCP | Shift register clock (LOW-to-HIGH edge-triggered) - advances Q output and shifts internal bits on each rising edge |
| 12 | STCP | Storage register clock (LOW-to-HIGH edge-triggered) - latches D0–D7 into internal storage on rising edge |
| 13 | PL | Parallel load control (active LOW) - transfers latched Dn data to shift register when asserted and SHCP inactive |
| 14 | DS | Serial data input - feeds new bit into MSB position of shift register on next SHCP edge |
| 16 | VCC | Positive supply (4.5–5.5 V); decoupling capacitor (100 nF) required within 10 mm of pin for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent clocks | STCP and SHCP enable precise separation of data capture (latch) and transmission (shift), eliminating timing conflicts in real-time I/O systems |
| TTL-compatible inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 5 V - eliminates need for level-shifting when interfacing with 5 V microcontrollers or legacy logic |
| Input clamp diodes | Enable safe interface to signals up to VCC + 0.5 V using external current-limiting resistors - protects against overvoltage during hot-plug or sensor fault conditions |
| Wide temperature range | Specified from –40 °C to +125 °C - supports deployment in engine control units, power converters, and outdoor industrial controllers without derating |
| Low dynamic power | CPD = 32 pF - limits switching power dissipation to <1.5 mW at 1 MHz, critical for thermally constrained embedded designs |
Applications
| Industrial PLC I/O Expansion | Microcontroller Peripheral Interface |
|---|---|
Use Scenario: Adding 8-bit parallel input capability to a resource-constrained MCU in a programmable logic controller cabinet. IC Role / Device Role / Timing Role: Captures status signals from sensors/switches via D0–D7 on STCP, then serially streams to MCU SPI port using SHCP and Q. Use Value: Reduces GPIO count requirement by 8× while maintaining deterministic sampling timing via separate STCP/SHCP control. |
Use Scenario: Interfacing a 5 V keypad matrix to a 3.3 V ARM Cortex-M0+ microcontroller with limited GPIO. IC Role / Device Role / Timing Role: Acts as level-translating input latch: Dn pins accept 5 V key scan lines; Q outputs feed MCU's UART RX or GPIO with clean 3.3 V–compatible serial stream. Use Value: Eliminates discrete level-shifters and reduces BOM cost by integrating latching, shifting, and voltage-tolerant inputs in one SO16 device. |
| Automotive Body Control Module | Test Equipment Digital Pattern Generator |
Use Scenario: Monitoring door lock switch states and window position sensors in a BCM operating near engine bay temperatures. IC Role / Device Role / Timing Role: Parallel-latches mechanical switch inputs (D0–D7) on STCP; serially reports status via Q to CAN transceiver interface logic under SHCP control. Use Value: Guaranteed operation at +125 °C ambient and HBM >2000 V ESD rating ensure reliability in harsh automotive environments without additional protection circuitry. |
Use Scenario: Generating precise multi-bit test vectors for IC functional validation in automated test equipment. IC Role / Device Role / Timing Role: Loads known 8-bit stimulus pattern via D0–D7, then shifts out deterministic bit sequence on Q synchronized to SHCP for DUT clock domain alignment. Use Value: Sub-25 ns propagation delay and tight setup/hold margins (5 ns th/tsu) support 20+ MHz pattern rates with minimal jitter accumulation across multiple stages. |
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,652 | CMOS-level inputs (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 logic with 5 V peripherals) due to higher noise margin and rail-to-rail input tolerance | Select when interfacing with CMOS or mixed-supply designs requiring lower static current (<8 μA) and broader VCC flexibility |
| SN74LS597N | Bipolar TTL technology; fixed 4.75–5.25 V operation; higher ICC (~30 mA), slower tpd (~40 ns) | Limited to legacy 5 V-only systems; incompatible with modern low-power or wide-temp designs | Only consider for direct replacement in obsolete LS-based boards where power and speed constraints permit |
Compared with 74HC597D,652 and SN74LS597N, the 74HCT597D,652 uniquely balances TTL input compatibility, industrial temperature range, and low dynamic power-making it optimal for new designs bridging legacy and modern 5 V control systems.
Availability
74HCT597D,652 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, microcontroller peripheral interfaces, and test equipment digital pattern generation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT597D,652 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 manufacturability in high-volume applications.
The 74HCT597 belongs to Nexperia's 74HCT logic family, engineered for TTL-compatible interfacing in industrial, automotive, and computing systems where robustness, wide temperature operation, and low power consumption are essential.
FAQ
Can 74HCT597D,652 operate at 3.3 V supply?
No. The 74HCT597D,652 is specified only for 4.5 V to 5.5 V operation per its recommended conditions. At 3.3 V, input thresholds (VIH ≥ 2.0 V) may not be reliably met, and output drive strength degrades significantly. Use 74HC597D,652 for 3.3 V systems, which supports 2.0–6.0 V with CMOS-level inputs.
What is the minimum pulse width required for SHCP and STCP?
At VCC = 4.5 V, the minimum pulse width (tW) for both SHCP and STCP is 16 ns (HIGH) and 6 ns (LOW) per the datasheet. For reliable operation across –40 °C to +125 °C, maintain ≥20 ns HIGH and ≥10 ns LOW to accommodate process variation and board-level signal integrity margins.
How does the PL (parallel load) input interact with the shift register?
When PL is pulled LOW, the current contents of the storage register (loaded via STCP) are transferred into the shift register on the next active SHCP edge. PL does not affect the storage register directly-it controls data transfer *from* storage *to* shift register, enabling synchronized loading before serial output begins.
Is the Q output three-state capable?
No. The Q output is push-pull and not three-state. It drives HIGH or LOW continuously during shifting. To share a serial bus with other devices, external multiplexing (e.g., 74LVC1G125 buffer with OE control) or time-division arbitration must be implemented in the system design.
74HCT597D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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:
- 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,652 FAQ
1.How can I place an order for 74HCT597D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT597D,652 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,652 reliable?
The price and inventory of 74HCT597D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT597D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT597D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT597D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT597D,652?
74HCT597D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT597D,652 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,652?
For technical support, including 74HCT597D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT597D,652 requirements.
6.How does Aetrix verify that 74HCT597D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT597D,652 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,652 meets industry standards.
7.What is the process for return or replacement of 74HCT597D,652?
All 74HCT597D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT597D,652, 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,652 part is unused and in its original packaging.
Return procedure for 74HCT597D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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