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Nexperia USA Inc. 74HC595BQ,115
- Part No.:
- 74HC595BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
74HC595BQ,115.pdf
- Description:
- IC 8BIT SHIFT REGISTER 16-DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:325,005
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Product details
Overview
74HC595BQ,115 from Nexperia is an 8-bit serial-in/serial-or-parallel-out shift register with independent shift and storage registers, 3-state outputs, asynchronous master reset (MR), and dual clocks (SHCP, STCP). It operates from 2.0 V to 6.0 V, supports cascading via Q7S, and delivers up to 100 MHz typical shift-out frequency. It is used in LED matrix drivers and microcontroller GPIO expansion where serial-to-parallel conversion and output latching are required.
For engineers reviewing the 74HC595BQ,115 datasheet, 74HC595BQ,115 pinout, 74HC595BQ,115 application, or 74HC595BQ,115 equivalent, this device serves as a low-power, industrial-grade shift register for embedded control systems requiring precise timing control, latch isolation, and high-noise immunity across -40 °C to +125 °C.
Technical Context
The device implements two synchronized but functionally separate 8-bit registers: a shift register accepting serial data on DS at SHCP edges, and a storage register loaded on STCP edges to drive parallel outputs Q0–Q7. Output enable (OE) controls 3-state operation independently of register state.
Its CMOS logic ensures rail-to-rail voltage compatibility (2.0–6.0 V), input clamp diodes allow safe interfacing with voltages exceeding VCC, and propagation delays are specified down to 15 ns (VCC = 6 V) for SHCP→Q7S and STCP→Qn paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HC - high-speed CMOS compatible with TTL input thresholds only in HCT variant; this part is HC, not HCT. |
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V microcontrollers without level shifting. |
| Max Shift Frequency | 100 MHz (typical) - supports high-throughput serial data loading in real-time control loops. |
| Propagation Delay | 15 ns (SHCP→Q7S, VCC = 6 V) - ensures tight timing alignment in synchronous cascaded chains. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive and industrial motor control environments. |
| Output Drive | ±35 mA per Qn pin - sufficient to directly drive LEDs or small logic loads without external buffers. |
| ESD Rating | HBM >2000 V, CDM >1000 V - robust against handling and board-level electrostatic discharge events. |
Pinout & Package
DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, 16-terminal leadless quad flat, thermal-enhanced, no leads, exposed die pad (not electrically connected in base variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Q1) | Parallel output stage 1 | Drives external load; high-impedance when OE = HIGH; latched value from storage register. |
| 2 (GND) | Ground reference | Primary return path for all internal logic and output currents; must be low-inductance connection. |
| 3 (DS) | Serial data input | Accepts bitstream on rising SHCP edge; sampled synchronously to avoid metastability. |
| 4 (Q4) | Parallel output stage 4 | Matches Q0–Q7 pinout order; enables consistent PCB layout across multiple devices. |
| 5 (Q5) | Parallel output stage 5 | Same electrical behavior as Q0–Q7; supports uniform current sourcing/sinking capability. |
| 6 (Q6) | Parallel output stage 6 | Used in 8-bit data bus reconstruction; timing aligned to STCP edge, not SHCP. |
| 7 (Q7) | Parallel output stage 7 / MSB | Final parallel output; also feeds internal Q7S for daisy-chaining to next device. |
| 8 (GND) | Second ground terminal | Reduces ground bounce in high-speed switching; improves noise immunity and thermal dissipation. |
| 9 (Q7S) | Serial output | Shift register's MSB output; connects to DS of next 74HC595 for multi-stage expansion. |
| 10 (MR) | Master reset (active LOW) | Asynchronously clears shift register only; storage register and outputs unaffected until next STCP. |
| 11 (SHCP) | Shift clock input | Rising-edge triggered; advances shift register one bit; independent of STCP timing. |
| 12 (STCP) | Storage clock input | Rising-edge triggered; transfers full 8-bit shift register content into output latches. |
| 13 (OE) | Output enable (active LOW) | Controls 3-state outputs only; no effect on internal register states or power consumption. |
| 14 (DS) | Serial data input (duplicate entry - see Pin 3) | Not applicable - Pin 3 is DS; Pin 14 is not assigned in SOT763-1 pinout per datasheet Fig. 4 and Table 2. |
| 15 (Q0) | Parallel output stage 0 / LSB | First parallel output; aligns with standard 8-bit LSB-first data ordering in firmware. |
| 16 (VCC) | Positive supply | Must be decoupled locally (e.g., 100 nF ceramic) near Pin 16 and Pin 2/GND pair. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shift/storage clocks | Enables pipelined operation: new data can be shifted in while previous byte drives outputs. |
| Asynchronous master reset | Clears shift register without disturbing storage register contents or output states. |
| Clamp diode inputs | Permits safe interface to signals up to VCC + 0.5 V using series current-limiting resistors. |
| 3-state parallel outputs | Allows direct connection to shared buses; OE control eliminates need for external bus transceivers. |
| 100 MHz max shift rate (typ) | Supports >8 Mbit/s serial data throughput - suitable for fast LED refresh or sensor data aggregation. |
Applications
| LED Matrix Driver | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 8×8 monochrome LED display with row/column scanning. IC Role / Device Role / Timing Role: Serial-to-parallel converter that latches column data during active row scan; Q0–Q7 drive columns, Q7S cascades to next device for row control. Use Value: Reduces MCU I/O count from 16 to 3 pins (DS, SHCP, STCP) while maintaining flicker-free 1 kHz refresh via precise STCP timing. |
Use Scenario: Adding 8 digital outputs to an STM32F4 with limited GPIOs for relay control. IC Role / Device Role / Timing Role: Output latch buffer between SPI peripheral and high-current relay drivers; STCP isolates output updates from ongoing serial load. Use Value: Eliminates output glitches during partial updates; OE allows safe hot-swap of relay banks without MCU intervention. |
| Sensor Data Aggregator | Industrial PLC Input Module |
|
Use Scenario: Consolidating status bits from 8 remote temperature sensors into single SPI stream. IC Role / Device Role / Timing Role: Parallel-input capture device sampling sensor flags on STCP, then serializing via Q7S for upstream MCU readback. Use Value: Enables deterministic 8-bit snapshot acquisition across distributed nodes with <100 ns skew between Q0–Q7. |
Use Scenario: Isolating 8 dry-contact inputs in DIN-rail mounted control cabinet. IC Role / Device Role / Timing Role: Level-shifting and debouncing interface between 24 V contacts and 3.3 V logic; MR resets shift register on power-up fault detection. Use Value: Supports EN 61000-4-5 surge immunity via input clamping diodes and 125 °C operation in enclosed enclosures. |
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 |
|---|---|---|---|
| 74HCT595BQ,115 | TTL-compatible inputs (VIH = 2.0 V min); identical pinout and function; slightly higher ICC at 5 V. | Better suited for mixed 5 V TTL/CMOS systems where input noise margins require tighter VIH/VIL thresholds. | Select when interfacing legacy 5 V TTL logic or when input signal rise times exceed 100 ns. |
| SN74HC595PWR | TSSOP-16 package (SOT403-1); same electrical specs; 0.65 mm pitch; no exposed thermal pad. | Preferred for manual assembly or lower-cost PCB fabrication where QFN reflow is unavailable. | Choose for prototyping or low-volume production where thermal performance is secondary to assembly simplicity. |
Compared with 74HCT595BQ,115, the HC variant offers wider VCC range (2–6 V) and lower input threshold sensitivity, while SN74HC595PWR trades thermal efficiency for assembly flexibility - both retain identical functional timing and latch behavior.
Availability
74HC595BQ,115 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller GPIO expansion, sensor data aggregation, and industrial PLC input modules requiring stable component supply across extended temperature ranges.
Supply support for 74HC595BQ,115 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 discrete components with focus on reliability, efficiency, and sustainability.
This device belongs to Nexperia's 74HC logic family, designed for low-power, high-noise-immunity digital interfacing in industrial, automotive, and consumer applications demanding wide supply range and extended temperature operation.
FAQ
Can 74HC595BQ,115 operate at 3.3 V?
Yes. The 74HC595BQ,115 is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At VCC = 3.3 V, VOH ≥ 2.97 V (IO = –4 mA), VOL ≤ 0.33 V (IO = 4 mA), and propagation delay is typically 24 ns (SHCP→Q7S), meeting standard 3.3 V logic interface requirements.
What is the function of the Q7S pin?
Q7S is the serial output of the shift register's most significant bit (Q7). It enables daisy-chaining: Q7S of one device connects to DS of the next, allowing unlimited expansion of parallel outputs using only three control lines (SHCP, STCP, OE) plus one data line per chain.
How does MR differ from STCP in reset behavior?
MR asynchronously clears only the shift register (stages 0–7), leaving the storage register and Q0–Q7 outputs unchanged until the next STCP edge. STCP transfers data but does not clear; MR provides immediate shift-register reset without affecting latched output states or requiring clock synchronization.
Is the DHVQFN16 package RoHS-compliant and lead-free?
Yes. The SOT763-1 package used for 74HC595BQ,115 is lead-free, RoHS-compliant, and halogen-free per Nexperia's product compliance documentation. It meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and requires standard reflow profile for QFN packages.
74HC595BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Shift Register
- Output Type:
- Tri-State
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Serial to Parallel, Serial
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DHVQFN (2.5x3.5)
74HC595BQ,115 FAQ
1.How can I place an order for 74HC595BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC595BQ,115 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 74HC595BQ,115 reliable?
The price and inventory of 74HC595BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC595BQ,115 is usually 5 days.
3.What payment methods are accepted for 74HC595BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC595BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC595BQ,115?
74HC595BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC595BQ,115 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 74HC595BQ,115?
For technical support, including 74HC595BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC595BQ,115 requirements.
6.How does Aetrix verify that 74HC595BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74HC595BQ,115 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 74HC595BQ,115 meets industry standards.
7.What is the process for return or replacement of 74HC595BQ,115?
All 74HC595BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC595BQ,115, 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 74HC595BQ,115 part is unused and in its original packaging.
Return procedure for 74HC595BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC595BQ,115 Tags
-
SN74HC164DR
Texas Instruments
-
SN74HC595DR
Texas Instruments
-
74HC595PW,118
Nexperia USA Inc.
-
SN74HC165PWR
Texas Instruments
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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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