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Nexperia USA Inc. 74HCT594DB,118
- Part No.:
- 74HCT594DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT594DB,118.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,408
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Product details
Overview
74HCT594DB,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with separate shift and storage registers, TTL-compatible inputs, independent SHCP/STCP clocks (max 92 MHz at VCC = 4.5 V), and active-low SHR/STR reset pins. It enables cascaded serial-to-parallel data conversion in LED matrix drivers and industrial I/O expanders.
For engineers reviewing the 74HCT594DB,118 datasheet, 74HCT594DB,118 pinout, 74HCT594DB,118 application, or 74HCT594DB,118 equivalent, this device supports precise timing-critical data latching, high-noise-immunity control of 8 parallel outputs, and robust operation across -40 °C to +125 °C with 4.5–5.5 V supply.
Technical Context
The device implements a two-stage pipeline: an 8-bit shift register accepting serial data on SHCP rising edges, and an independent 8-bit storage register transferring data on STCP rising edges-enabling glitch-free output updates. Both registers feature dedicated asynchronous active-low reset pins (SHR, STR) for deterministic initialization.
Input thresholds comply with TTL logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V), ensuring compatibility with legacy microcontrollers and FPGAs. Output drive strength is ±6 mA per Qn pin and ±4 mA on Q7S, with propagation delays as low as 15 ns (STCP→Qn, VCC = 4.5 V, CL = 50 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit serial-in/parallel-out shift register with output storage register and serial cascade capability (Q7S) |
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V TTL systems without level-shifting |
| Max Clock Frequency | 92 MHz (SHCP/STCP) - supports high-speed data streaming in real-time control loops |
| Output Drive | ±6 mA per Q0–Q7 - directly drives LEDs or logic inputs without external buffers |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive and industrial motor control environments |
| Input Compatibility | TTL-level inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V) - interoperable with 5 V microcontrollers and legacy logic |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - withstands handling and board-level electrostatic events |
Pinout & Package
74HCT594DB,118 uses the SSOP16 (SOT338-1) package: 16-pin shrink small outline, 5.3 mm body width, 0.65 mm pitch, surface-mount, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Q0) | Parallel output bit 0 | LSB of latched 8-bit parallel output; driven by storage register on STCP edge |
| 2 (Q1) | Parallel output bit 1 | Second bit of latched parallel output; synchronized to STCP, not SHCP |
| 3 (Q2) | Parallel output bit 2 | Third bit of latched parallel output; immune to shift register updates during STCP hold time |
| 4 (Q3) | Parallel output bit 3 | Fourth bit of latched parallel output; maintains stable state while shift register advances |
| 5 (Q4) | Parallel output bit 4 | Fifth bit of latched parallel output; decoupled from serial shifting via dual-register architecture |
| 6 (Q5) | Parallel output bit 5 | Sixth bit of latched parallel output; enables simultaneous update of all 8 outputs on single STCP pulse |
| 7 (Q6) | Parallel output bit 6 | Seventh bit of latched parallel output; supports synchronous display refresh or I/O snapshot |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-impedance for noise immunity |
| 9 (Q7S) | Serial output | MSB of shift register only; used to daisy-chain multiple 74HCT594 devices without external wiring |
| 10 (SHR) | Shift register reset | Active-low asynchronous clear of shift register; independent of STCP/SHCP timing |
| 11 (SHCP) | Shift clock input | Rising-edge-triggered clock for serial data entry into shift register; controls data advancement |
| 12 (STCP) | Storage clock input | Rising-edge-triggered clock that transfers full 8-bit content from shift to storage register |
| 13 (STR) | Storage register reset | Active-low asynchronous clear of storage register and parallel outputs Q0–Q7 |
| 14 (DS) | Serial data input | Data loaded into LSB (Q0 position) of shift register on first SHCP rising edge |
| 15 (Q7) | Parallel output bit 7 | MSB of latched parallel output; mirrors Q7S only after STCP transfer; provides stable parallel access |
| 16 (VCC) | Positive supply | 4.5–5.5 V power rail; powers both shift and storage registers; bypass capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Independent shift and storage clocks | Enables continuous serial loading (SHCP) while holding stable parallel outputs (Q0–Q7) until explicit STCP trigger |
| Asynchronous active-low resets | SHR and STR allow deterministic zeroing of shift or storage register independently-critical for fault recovery |
| TTL-compatible input thresholds | Guarantees reliable interfacing with 5 V microcontrollers (e.g., ATmega328P, STM32F103) without level shifters |
| Serial cascade support (Q7S) | Permits chaining multiple 74HCT594s to extend parallel output count (e.g., 24-bit I/O expansion) |
| High noise immunity & latch-up robustness | Exceeds JESD78 Class II Level B (>100 mA latch-up immunity); suitable for electrically noisy industrial PLCs |
Applications
| LED Matrix Display Driver | Industrial I/O Expander |
|---|---|
|
Use Scenario: Driving 8×8 monochrome LED grid with row/column scanning using microcontroller GPIO. IC Role / Device Role / Timing Role: Shift register latches column data; storage register holds stable output during row multiplexing. Use Value: Eliminates need for 8 dedicated MCU output pins; enables flicker-free 1 kHz refresh via precise STCP timing. |
Use Scenario: Adding 8 digital outputs to a PLC controller with limited native I/O. IC Role / Device Role / Timing Role: Converts SPI serial commands into parallel control signals for solenoids, relays, or indicators. Use Value: Provides galvanically isolated, noise-resistant outputs rated for 125 °C ambient-no additional buffering required. |
| Remote Control Data Latch | Automotive Body Controller |
|
Use Scenario: Holding IR remote command bits for decoding and action execution in set-top box SoC. IC Role / Device Role / Timing Role: Captures serial IR data stream, then freezes decoded byte for CPU read via parallel bus. Use Value: Prevents data corruption during CPU interrupt latency; SHR/STR allow safe reset on invalid frame detection. |
Use Scenario: Controlling interior lighting zones and door lock actuators in 12 V vehicle electrical system. IC Role / Device Role / Timing Role: Interfaces CAN-to-parallel bridge IC to drive high-side switches for LED clusters and motors. Use Value: Operates reliably at 125 °C under dashboard; TTL inputs tolerate voltage transients common in automotive 12 V rails. |
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 |
|---|---|---|---|
| 74HC594DB,118 | CMOS 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 MCU driving 5 V peripherals) | Select when interfacing with CMOS logic or variable supply designs requiring 2–6 V operation |
| SN74LV595APWR | Lower 1.65–5.5 V supply; 3.3 V optimized; higher max fCLK (100 MHz); LV logic family | Preferred for modern 3.3 V embedded systems with tight power budgets and high-speed SPI interfaces | Choose for new 3.3 V designs where LV logic compatibility and lower ICC (10 μA typical) are critical |
Compared with 74HC594DB,118 and SN74LV595APWR, the 74HCT594DB,118 uniquely balances TTL input compatibility, 125 °C operation, and proven industrial reliability-making it optimal for legacy 5 V control systems requiring drop-in replacement assurance.
Availability
74HCT594DB,118 is available at Aetrix Electronics and suitable for LED display drivers, industrial I/O expanders, automotive body controllers, and remote control data latching requiring stable component supply across extended temperature ranges.
Supply support for 74HCT594DB,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 focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HCT594 belongs to Nexperia's industry-standard 74-series logic portfolio, engineered for robustness in harsh environments and designed specifically for reliable serial-to-parallel data conversion in real-time control and display systems.
FAQ
What is the minimum pulse width required on SHCP and STCP inputs?
The minimum pulse width for both SHCP and STCP is 16 ns at VCC = 4.5 V (–40 °C to +125 °C). This ensures reliable register clocking across full temperature and voltage range. Pulse widths below this may cause metastability or skipped edges, especially under worst-case process/voltage corners.
Can SHCP and STCP be tied together for simplified control?
Yes-tying SHCP and STCP together is permitted and commonly used, but results in the shift register always being one clock pulse ahead of the storage register. Outputs Q0–Q7 will reflect data shifted one cycle earlier than the current serial input, requiring careful timing alignment in firmware.
How does the Q7S output behave during cascading?
Q7S outputs the MSB (bit 7) of the shift register *only*, not the storage register. When cascading, Q7S connects to DS of the next device, enabling seamless 16-/24-bit extension. Q7S remains active during STCP assertion and is unaffected by STR.
Is a pull-up resistor required on SHR or STR pins?
No-SHR and STR are active-low inputs with internal clamp diodes and specified VIH/VIL thresholds. They should be driven actively LOW to reset or held HIGH (e.g., via MCU GPIO or VCC through 10 kΩ) for normal operation. Pull-ups are unnecessary and may increase leakage current.
74HCT594DB,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:
- Serial to Parallel, Serial
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HCT594DB,118 FAQ
1.How can I place an order for 74HCT594DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT594DB,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 74HCT594DB,118 reliable?
The price and inventory of 74HCT594DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT594DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT594DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT594DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT594DB,118?
74HCT594DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT594DB,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 74HCT594DB,118?
For technical support, including 74HCT594DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT594DB,118 requirements.
6.How does Aetrix verify that 74HCT594DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT594DB,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 74HCT594DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT594DB,118?
All 74HCT594DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT594DB,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 74HCT594DB,118 part is unused and in its original packaging.
Return procedure for 74HCT594DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT594DB,118 Tags
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SN74HC164DR
Texas Instruments
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SN74HC595DR
Texas Instruments
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74HC595PW,118
Nexperia USA Inc.
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SN74HC165PWR
Texas Instruments
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HEF4094BT,653
Nexperia USA Inc.
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74HC595D,118
Nexperia USA Inc.
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SN74HC595PWR
Texas Instruments
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74HC165D,653
Nexperia USA Inc.
-
SN74LV165APWR
Texas Instruments
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74HC595BQ,115
Nexperia USA Inc.
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74HC165BQ,115
Nexperia USA Inc.
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CD4094BPWR
Texas Instruments
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