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Nexperia USA Inc. 74HC594BQ-Q100X
- Part No.:
- 74HC594BQ-Q100X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
74HC594BQ-Q100X.pdf
- Description:
- 74HC594BQ-Q100/SOT763/DHVQFN16
- Quantity:
- Payment:
- Shipping:
Inventory:2,948
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Product details
Overview
74HC594BQ-Q100 from Nexperia is an automotive-qualified 8-bit serial-in/parallel-out shift register with independent shift and storage registers, CMOS-level inputs, 2.0–6.0 V supply range, and DHVQFN16 package. It enables cascaded serial-to-parallel data conversion in automotive body control modules, LED driver interfaces, and remote I/O expansion where AEC-Q100 Grade 1 reliability is required.
For engineers reviewing the 74HC594BQ-Q100 datasheet, 74HC594BQ-Q100 pinout, 74HC594BQ-Q100 application, or 74HC594BQ-Q100 equivalent, key selection criteria include independent SHCP/STCP timing control, -40 °C to +125 °C operation, Q7S serial output for daisy-chaining, active-low SHR/STR reset pins, and DHVQFN16 side-wettable flanks for AOI-compatible solder joint inspection.
Technical Context
The device implements a two-stage pipeline: an 8-bit shift register accepting serial data on SHCP rising edges, and a separate 8-bit storage register loaded on STCP rising edges-enabling non-overlapping update of parallel outputs (Q0–Q7). Both registers feature dedicated asynchronous active-low reset pins (SHR, STR), allowing independent clearing without affecting the other stage.
Input clamping diodes permit safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The DHVQFN16 package (SOT763-1) provides thermal enhancement and side-wettable flanks for automated optical inspection of solder joints-critical for automotive production traceability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit serial-in/parallel-out shift register with output storage register and serial cascade output (Q7S) |
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-supplied automotive subsystems |
| Operating Temperature | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and powertrain-adjacent applications |
| Max Clock Frequency | 109 MHz at VCC = 6.0 V - enables high-speed serial loading in real-time control loops |
| Output Drive | ±35 mA per parallel output (Qn), ±25 mA on serial output (Q7S) - directly drives LEDs or logic inputs without external buffers |
| Input Logic Type | CMOS-level compatible - VIH ≥ 3.15 V @ VCC = 4.5 V; VIL ≤ 1.35 V @ VCC = 4.5 V |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets automotive robustness requirements for handling and assembly |
Pinout & Package
DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, no leads, 16 terminals, side-wettable flanks for AOI, thermal pad (terminal 1 index area) electrically isolated unless connected to VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Q7 | MSB parallel output - final stage of storage register, synchronized to STCP edge |
| 2 | SHR | Active-low shift register reset - asynchronously clears shift register only, independent of storage register |
| 3 | Q6 | Parallel output - bit 6 of storage register, updated only on STCP rising edge |
| 4 | SHCP | Shift clock input - rising edge shifts DS into stage 0 and advances prior data; controls shift register timing |
| 5 | Q5 | Parallel output - bit 5 of storage register, immune to shift activity until STCP event |
| 6 | STCP | Storage clock input - rising edge transfers all 8 bits from shift register to storage register and Q0–Q7 outputs |
| 7 | Q4 | Parallel output - bit 4 of storage register, latched and held stable between STCP edges |
| 8 | STR | Active-low storage register reset - asynchronously clears Q0–Q7 outputs and storage register only |
| 9 | Q3 | Parallel output - bit 3 of storage register, decoupled from shift register via dual-clock architecture |
| 10 | DS | Serial data input - synchronous input to shift register stage 0 on each SHCP rising edge |
| 11 | Q2 | Parallel output - bit 2 of storage register, enables glitch-free output updates in multi-device chains |
| 12 | Q0 | LSB parallel output - first stage of storage register, updated identically with Q1–Q7 on STCP |
| 13 | GND | Ground reference - return path for all internal logic and output currents; must be low-impedance |
| 14 | Q7S | Serial output - Q7 of shift register (not storage register), enables cascading to next 74HC594 device |
| 15 | Q1 | Parallel output - bit 1 of storage register, maintains state during ongoing serial shifting |
| 16 | VCC | Supply voltage - powers both shift and storage registers; clamp diodes allow overvoltage-safe input biasing |
Key Features
| Feature | Design Value |
|---|---|
| Independent shift/storage clocks | SHCP and STCP pins enable precise timing separation-prevents output glitches during serial loading |
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40 °C to +125 °C with full reliability testing per stress test conditions |
| Dual asynchronous resets | SHR and STR allow selective clearing of shift or storage register without disturbing the other stage |
| DHVQFN16 with side-wettable flanks | Enables automated optical inspection (AOI) of solder joints-reducing field failure risk in automotive manufacturing |
| Input clamp diodes | Permit safe interface to signals up to VCC + 0.5 V using external current-limiting resistors |
Applications
| Automotive Body Control Unit (BCU) | LED Matrix Driver Interface |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, and mirror actuators via microcontroller GPIO expansion. IC Role / Device Role / Timing Role: Shift register acts as serial-to-parallel I/O expander; SHCP/STCP isolation ensures deterministic output updates during CAN message processing. Use Value: Reduces MCU pin count by 8× while maintaining glitch-free actuator control through separated shift/storage clocks. | Use Scenario: Driving 8-channel LED arrays in instrument clusters or ambient lighting systems with PWM dimming. IC Role / Device Role / Timing Role: Stores LED on/off states in storage register; STCP synchronizes all 8 outputs to avoid visible flicker during refresh. Use Value: ±35 mA output drive per channel eliminates need for external drivers; Q7S enables daisy-chained multi-segment control. |
| Remote I/O Expansion Module | Industrial Sensor Data Aggregation |
Use Scenario: Distributed sensor node collecting switch inputs across vehicle cabin (seat occupancy, seatbelt status, HVAC buttons). IC Role / Device Role / Timing Role: Serially loads 8-bit status word from local microcontroller; STR reset clears stale data before new acquisition cycle. Use Value: Active-low STR allows hardware-initiated reset independent of firmware; -40 °C to +125 °C rating ensures operation in extreme cabin environments. | Use Scenario: Consolidating analog sensor readings (temperature, humidity, pressure) from multiple sources into a single digital bus. IC Role / Device Role / Timing Role: Shift register stages buffer ADC result bits; storage register holds final converted value until host MCU reads Q0–Q7. Use Value: Dual-register architecture prevents read-misalignment during concurrent conversion and transmission cycles. |
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 |
|---|---|---|---|
| 74HCT594BQ-Q100 | TTL-compatible inputs (VIH = 2.0 V min @ VCC = 4.5 V); identical pinout, timing, and packaging | Required when driving from legacy 5 V TTL logic; not suitable for direct 3.3 V CMOS microcontroller interfacing without level translation | Select when interfacing with older 5 V logic families; verify input thresholds match source driver VOH/VOL |
| SN74HC595QPWRQ1 | TI's AEC-Q100 Grade 1 8-bit shift register; lacks independent SHR/STR-shares single SRCLR pin for both registers | Acceptable where simultaneous reset of shift and storage registers is acceptable; no provision for selective register clearing | Choose if cost or second-source availability is prioritized over independent reset capability |
Compared with 74HCT594BQ-Q100, the TTL-input variant trades CMOS noise immunity for legacy compatibility; compared with SN74HC595QPWRQ1, the 74HC594BQ-Q100 offers finer control via separate reset pins-critical for fault-tolerant automotive diagnostics and partial register recovery.
Availability
74HC594BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control units, LED driver interfaces, remote I/O expansion modules, and industrial sensor data aggregation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 74HC594BQ-Q100 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 optimized for automotive, industrial, and consumer applications-with emphasis on reliability, efficiency, and manufacturability.
This device belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for AEC-Q100-compliant serial interface expansion in harsh-environment electronic control units where functional safety and long-term supply stability are mandatory.
FAQ
What is the purpose of the Q7S pin?
Q7S is the serial output of the shift register (not the storage register), providing the MSB of the shift register's current contents. It enables daisy-chaining multiple 74HC594 devices: Q7S of one device connects to DS of the next, allowing 16-, 24-, or N×8-bit serial shift operations with a single data line and shared clocks.
Can SHCP and STCP be tied together?
Yes-tying SHCP and STCP together is permitted and results in the shift register always being one clock pulse ahead of the storage register. However, this eliminates independent timing control and may cause output glitches during continuous shifting; separate routing is recommended for deterministic behavior in automotive applications.
How does the DHVQFN16 package support automotive manufacturing?
The SOT763-1 DHVQFN16 package features side-wettable flanks that expose solder along the vertical edges of each terminal, enabling automated optical inspection (AOI) systems to verify solder joint integrity-critical for zero-defect automotive production and IATF 16949 compliance.
What happens when SHR and STR are both asserted LOW?
Asserting both SHR and STR LOW simultaneously clears both the shift register (removing data from DS-to-Q7S path) and the storage register (forcing Q0–Q7 to LOW), but leaves the internal clock paths and input buffers fully operational-allowing immediate reinitialization upon release without power cycling or reset sequencing.
74HC594BQ-Q100X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- 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:
- Serial to Parallel, Serial
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DHVQFN (2.5x3.5)
74HC594BQ-Q100X FAQ
1.How can I place an order for 74HC594BQ-Q100X through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC594BQ-Q100X 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 74HC594BQ-Q100X reliable?
The price and inventory of 74HC594BQ-Q100X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC594BQ-Q100X is usually 5 days.
3.What payment methods are accepted for 74HC594BQ-Q100X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC594BQ-Q100X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC594BQ-Q100X?
74HC594BQ-Q100X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC594BQ-Q100X 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 74HC594BQ-Q100X?
For technical support, including 74HC594BQ-Q100X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC594BQ-Q100X requirements.
6.How does Aetrix verify that 74HC594BQ-Q100X is sourced from the original manufacturer or authorized distributors?
All 74HC594BQ-Q100X 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 74HC594BQ-Q100X meets industry standards.
7.What is the process for return or replacement of 74HC594BQ-Q100X?
All 74HC594BQ-Q100X units undergo pre-shipment inspection (PSI). If there is an issue with 74HC594BQ-Q100X, 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 74HC594BQ-Q100X part is unused and in its original packaging.
Return procedure for 74HC594BQ-Q100X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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