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Nexperia USA Inc. 74HCT597DB,118
- Part No.:
- 74HCT597DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT597DB,118.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
74HCT597DB,118 from Nexperia is an 8-bit parallel-in/serial-out shift register with input flip-flops, designed for digital data serialization in industrial control and embedded I/O expansion. It features separate positive-edge-triggered storage (STCP) and shift (SHCP) clocks, asynchronous master reset (MR), parallel load (PL), and TTL-compatible inputs operating at 4.5 V to 5.5 V. Used in microcontroller peripheral interfacing where parallel data must be converted to serial streams for reduced pin count.
For engineers reviewing the 74HCT597DB,118 datasheet, 74HCT597DB,118 pinout, 74HCT597DB,118 application, or 74HCT597DB,118 equivalent, this device supports precise timing-critical data capture and shifting in non-automotive industrial systems requiring -40 °C to +125 °C operation, low-power CMOS logic, and robust noise immunity.
Technical Context
The 74HCT597DB,118 integrates two synchronized but functionally independent registers: an 8-bit parallel input latch (D0–D7) clocked by STCP, and a serial shift register loaded from the latch via PL or directly clocked by SHCP. Its dual-clock architecture enables pipelined data acquisition-parallel capture on STCP, then controlled serial output on SHCP-with independent control of load, clear (MR), and shift enable.
All inputs are TTL-level compatible (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), and outputs drive ±4 mA at VOH ≥ 3.98 V and VOL ≤ 0.26 V. The device includes input clamp diodes for overvoltage tolerance and meets JESD7A (2.0–6.0 V) and JEDEC ESD standards (HBM >2000 V, CDM >1000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit parallel-in/serial-out shift register with input latches and asynchronous reset |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and mixed-voltage microcontroller systems |
| Input Logic Level | TTL-compatible - accepts 0.8 V/2.0 V thresholds, eliminating level-shifting in 5 V controller interfaces |
| Propagation Delay | 23 ns (max) from SHCP to Q at VCC = 4.5 V - supports reliable 20 MHz serial output rates |
| Operating Temperature | -40 °C to +125 °C - qualified for extended-range industrial environments without derating |
| Output Drive | ±4.0 mA at VCC = 4.5 V - sufficient to drive multiple CMOS inputs or short PCB traces without buffering |
| ESD Protection | HBM >2000 V, CDM >1000 V - enhances robustness during handling and board assembly |
Pinout & Package
74HCT597DB,118 is supplied in SSOP16 (SOT338-1) package: plastic shrink small outline, 16 leads, body width 5.3 mm, pitch 0.65 mm. Pin 1 index marked, lead finish matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (8) | Ground reference | Return path for all internal logic and I/O; must be low-impedance connection to system ground plane |
| Q (9) | Serial data output | MSB-first serial output from shift register; edge-aligned to SHCP rising edge |
| MR (10) | Asynchronous master reset | Active-low signal that clears shift register contents immediately, independent of clocks |
| SHCP (11) | Shift register clock | Rising-edge-triggered clock controlling serial output shift; synchronizes Q updates |
| STCP (12) | Storage register clock | Rising-edge-triggered clock latching parallel inputs D0–D7 into input flip-flops |
| PL (13) | Parallel load control | Active-low signal enabling transfer of latched D0–D7 data into shift register on next SHCP edge |
| DS (14) | Serial data input | Input for serially shifted data when used in cascaded or feedback configurations |
| D0–D7 (15,1–7) | Parallel data inputs | Eight-bit parallel data bus; sampled on STCP rising edge and held until next latch event |
| VCC (16) | Positive supply | Primary power rail; decoupling capacitor (100 nF) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent clock domains | Separate STCP and SHCP inputs enable pipelined parallel capture and serial output without data collision |
| TTL-compatible input thresholds | VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V allow direct interface with legacy 5 V microcontrollers and logic families |
| Asynchronous master reset | MR pin forces shift register to zero state immediately, supporting fail-safe initialization and error recovery |
| Input clamp diodes | Enable safe interfacing to voltages exceeding VCC using external current-limiting resistors |
| Industrial temperature range | Specified from -40 °C to +125 °C - suitable for uncooled industrial enclosures and motor control environments |
Applications
| Industrial PLC I/O Expansion | Microcontroller GPIO Multiplexing |
|---|---|
Use Scenario: Adding 8-bit parallel input capability to a resource-constrained PLC CPU with limited GPIO. IC Role / Device Role / Timing Role: Captures sensor status bits in parallel via STCP, then serializes them to MCU via Q/SHCP for minimal pin usage. Use Value: Reduces required MCU interface pins from 8 to 3 (CLK, DATA, LOAD), simplifying PCB routing and firmware I/O management. |
Use Scenario: Expanding digital input capability on an ARM Cortex-M0+ MCU with only two available SPI pins. IC Role / Device Role / Timing Role: Acts as parallel-to-serial converter: STCP captures switch states, SHCP shifts data out synchronously to MCU SPI MISO. Use Value: Enables reading of 8 mechanical switches using one SPI interface, avoiding GPIO port expansion ICs or bit-banged solutions. |
| Legacy System Data Acquisition | LED Matrix Column Driver Interface |
Use Scenario: Digitizing analog sensor outputs in a retrofit industrial panel using discrete ADCs and parallel-output DACs. IC Role / Device Role / Timing Role: Buffers and serializes parallel ADC result words before transmission to central controller over RS-485 with UART framing. Use Value: Eliminates need for dedicated parallel bus wiring; allows reuse of existing 2-wire serial infrastructure with deterministic timing. |
Use Scenario: Driving column lines of a 64-LED multiplexed display from a low-pin-count MCU. IC Role / Device Role / Timing Role: Latches column pattern (D0–D7) on STCP, then shifts out via Q/SHCP to feed column decoder logic at display refresh rate. Use Value: Achieves precise column timing alignment across 8-bit patterns, reducing ghosting and improving display uniformity. |
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 |
|---|---|---|---|
| 74HCT165PW,118 | 8-bit parallel-load shift register with complementary Q̅ output and no input latches; single clock (CP) only | Lacks separate STCP/SHCP domains - unsuitable for pipelined capture-and-shift workflows | Select only if synchronous single-clock operation suffices and Q̅ output is needed for inverted logic paths |
| SN74LV595APWR | CMOS 8-bit shift register with output latches and 3-state outputs; operates down to 2 V; no MR or PL inputs | Includes output enable (OE) but lacks asynchronous reset and parallel load - limits fault recovery and multi-stage loading | Prefer for low-voltage (2–5.5 V) systems needing tri-state outputs, but not for MR-critical safety logic |
Compared with 74HCT597DB,118, the 74HCT165PW,118 offers simpler timing but no pipelining, while SN74LV595APWR adds tri-state flexibility at the cost of missing MR and PL-making the 74HCT597DB,118 uniquely suited for deterministic, fault-tolerant industrial data capture.
Availability
74HCT597DB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller GPIO multiplexing, and legacy system data acquisition requiring stable component supply across extended temperature ranges.
Supply support for 74HCT597DB,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, discrete, and MOSFET solutions with focus on efficiency, reliability, and sustainability.
The 74HCT597DB,118 belongs to Nexperia's 74HCT logic family, engineered for TTL-compatible interfacing in industrial automation, building controls, and embedded systems demanding robust operation across wide temperature and voltage ranges.
FAQ
What is the maximum clock frequency supported by the 74HCT597DB,118?
The 74HCT597DB,118 supports a maximum SHCP clock frequency of 24 MHz at VCC = 4.5 V and CL = 50 pF, and up to 20 MHz at full -40 °C to +125 °C operating range. This is derived from tW(min) = 20 ns and fmax = 1/tW, confirmed in Table 7 of the official Nexperia datasheet Rev. 7.
Can the 74HCT597DB,118 operate with a 3.3 V supply?
No - the 74HCT597DB,118 is specified only for 4.5 V to 5.5 V operation per Table 5. Its TTL-compatible inputs require VIH ≥ 2.0 V, but VCC < 4.5 V violates recommended conditions and risks unreliable switching; use 74LV595 or 74HC595 for 3.3 V systems.
How does the PL (parallel load) input interact with the shift register?
When PL is pulled LOW, the next rising edge of SHCP transfers the currently latched D0–D7 values from the storage register into the shift register. This enables controlled, clock-synchronized loading without disrupting ongoing shift operations - distinct from asynchronous MR or direct DS shifting.
Is the 74HCT597DB,118 pin-compatible with other 74HCT-series shift registers?
No - the 74HCT597DB,118 uses a unique 16-pin SSOP layout (SOT338-1) with dedicated STCP, SHCP, PL, and MR pins. It is not pin-compatible with 74HCT165 (16-pin SO) or 74HCT595 (16-pin SO/TSSOP), which have different pin assignments and functional sets (e.g., no STCP/PL).
74HCT597DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-SSOP
74HCT597DB,118 FAQ
1.How can I place an order for 74HCT597DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT597DB,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 74HCT597DB,118 reliable?
The price and inventory of 74HCT597DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT597DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT597DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT597DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT597DB,118?
74HCT597DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT597DB,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 74HCT597DB,118?
For technical support, including 74HCT597DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT597DB,118 requirements.
6.How does Aetrix verify that 74HCT597DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT597DB,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 74HCT597DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT597DB,118?
All 74HCT597DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT597DB,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 74HCT597DB,118 part is unused and in its original packaging.
Return procedure for 74HCT597DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT597DB,118 Tags
-
SN74HC164DR
Texas Instruments
-
SN74HC595DR
Texas Instruments
-
74HC595PW,118
Nexperia USA Inc.
-
SN74HC165PWR
Texas Instruments
-
HEF4094BT,653
Nexperia USA Inc.
-
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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