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Nexperia USA Inc. 74AHCT595BQ-Q100,1
- Part No.:
- 74AHCT595BQ-Q100,1
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
74AHCT595BQ-Q100,1.pdf
- Description:
- IC SHIFT REG 8BIT SER 16DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,984
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Product details
Overview
74AHCT595BQ-Q100 from Nexperia is an automotive-grade 8-bit serial-in/parallel-out shift register with separate shift and storage registers, 3-state outputs, TTL-compatible inputs, and AEC-Q100 Grade 1 qualification (−40 °C to +125 °C). It features asynchronous master reset (MR), dual clocks (SHCP/STCP), serial output (Q7S) for cascading, and output enable (OE) control - used in automotive LED driver interfaces and body control modules for expanding GPIO via SPI.
For engineers reviewing the 74AHCT595BQ-Q100 datasheet, 74AHCT595BQ-Q100 pinout, 74AHCT595BQ-Q100 application, or 74AHCT595BQ-Q100 equivalent, key selection considerations include TTL-level input compatibility, 3-state parallel output timing (tpd ≤ 11.5 ns at VCC = 5 V), DHVQFN16 thermal performance, and AEC-Q100 temperature range compliance.
Technical Context
This device implements a two-stage pipeline: an 8-bit shift register accepting serial data on SHCP rising edges, and an independent 8-bit storage latch transferring data on STCP rising edges - enabling simultaneous shift-and-latch operation. The separation allows continuous serial loading while holding stable parallel outputs.
Outputs are actively driven (Q0–Q7) or placed in high-impedance state via OE (active LOW), with no effect on internal register states. MR asynchronously clears only the shift register; the storage register retains its last loaded value until next STCP edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | AHCT - TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V at VCC = 4.5–5.5 V) ensure robust interfacing with legacy microcontrollers. |
| Supply Voltage Range | 4.5 V to 5.5 V - supports standard 5 V automotive domains; not rated below 4.5 V unlike AHC variant. |
| Propagation Delay (tpd) | ≤ 11.5 ns (max, VCC = 4.5–5.5 V, CL = 50 pF) - enables reliable operation up to 90 MHz fmax in storage register path. |
| Output Drive Strength | ±8 mA (IOH/IOL) - sufficient to directly drive LEDs or logic inputs without external buffers in low-power automotive subsystems. |
| Temperature Range | −40 °C to +125 °C - qualified per AEC-Q100 Grade 1, validated for under-hood and powertrain-adjacent applications. |
| ESD Robustness | HBM > 2000 V, CDM > 1000 V - meets automotive ESD immunity requirements for assembly and field operation. |
| Package | DHVQFN16 (SOT763-1), 2.5 × 3.5 × 0.85 mm - thermally enhanced, side-wettable flanks support AOI and high-reliability reflow in automotive PCBs. |
Pinout & Package
DHVQFN16 package (SOT763-1) with exposed thermal pad (non-electrical, optional GND connection); 16-terminal quad flat no-lead construction optimized for thermal dissipation and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Q0 | Parallel output bit 0 - latched data from storage register stage 0; active HIGH/LOW depending on input. |
| 2 | Q1 | Parallel output bit 1 - synchronized with Q0; all Q0–Q7 updated simultaneously on STCP edge. |
| 3 | Q2 | Parallel output bit 2 - provides deterministic timing relationship to STCP (tpd ≤ 11.5 ns). |
| 4 | Q3 | Parallel output bit 3 - 3-state controlled by OE; high-impedance when OE = HIGH. |
| 5 | Q4 | Parallel output bit 4 - electrically isolated from other outputs during OE-driven disable. |
| 6 | Q5 | Parallel output bit 5 - maintains state during serial shifting if STCP remains inactive. |
| 7 | Q6 | Parallel output bit 6 - unaffected by MR; MR resets only shift register (stages feeding storage register). |
| 8 | GND | Ground reference - pin 8 is functional ground; thermal pad may be floated or tied to GND plane. |
| 9 | Q7S | Serial output - shifted-out MSB (Q7) of shift register; enables daisy-chaining multiple 74AHCT595 devices. |
| 10 | MR | Master reset (active LOW) - asynchronously clears shift register contents; storage register and outputs unchanged. |
| 11 | SHCP | Shift clock input - rising-edge triggered; advances shift register one position; tolerant of slow edges (Schmitt-triggered). |
| 12 | STCP | Storage clock input - rising-edge triggered; transfers current shift register contents to output latches. |
| 13 | OE | Output enable (active LOW) - controls 3-state buffer enable; no impact on internal register states. |
| 14 | DS | Serial data input - loaded into LSB (stage 0) on first SHCP rising edge after data present. |
| 15 | Q7 | Parallel output bit 7 - MSB of parallel output bus; matches Q7S value after STCP pulse completes transfer. |
| 16 | VCC | Supply voltage - must be within 4.5–5.5 V; decoupling capacitor required near pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C operation with full electrical testing across temperature and lifetime stress conditions. |
| Separate shift and storage clocks | Enables concurrent serial loading (via SHCP) and stable parallel output delivery (via STCP), eliminating output glitches during update. |
| TTL-compatible inputs | Accepts standard 5 V TTL logic levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V), ensuring interoperability with legacy MCUs and FPGAs. |
| Overvoltage-tolerant inputs | Withstands up to 5.5 V input voltage regardless of VCC, supporting mixed-voltage system interfacing without level shifters. |
| Dual 3-state control | OE pin disables all Q0–Q7 outputs simultaneously to high-impedance, allowing shared bus operation in multi-device configurations. |
| DHVQFN16 with side-wettable flanks | Enables automated optical inspection of solder joints and improves thermal resistance (RθJA ≈ 106 °C/W) for automotive reliability. |
Applications
| Automotive LED Matrix Driver | Body Control Module I/O Expansion |
|---|---|
|
Use Scenario: Driving 8-channel LED arrays in instrument clusters or ambient lighting systems using SPI-controlled GPIO expansion. IC Role / Device Role / Timing Role: Serial-to-parallel converter translating MCU SPI data into parallel output pulses; STCP synchronizes LED updates to avoid visible flicker. Use Value: Reduces MCU pin count by 8× while maintaining precise timing control (tpd ≤ 11.5 ns) and AEC-Q100 reliability for safety-critical lighting. |
Use Scenario: Adding digital output capability to low-pin-count microcontrollers in door module controllers or seat position sensors. IC Role / Device Role / Timing Role: Output latch providing buffered, 3-state-controllable signals for relays, solenoids, or status indicators. Use Value: Enables hot-swap-safe I/O expansion via OE control and withstands automotive transients due to overvoltage-tolerant inputs (5.5 V). |
| Dashboard Switch Interface | Engine Bay Sensor Data Aggregation |
|
Use Scenario: Scanning mechanical switch banks (e.g., HVAC controls) using serial-in configuration with debounced inputs. IC Role / Device Role / Timing Role: Shift register capturing switch states; MR provides hardware-initiated reset independent of MCU firmware state. Use Value: Guarantees known initial state after power-on reset or brownout recovery, critical for fail-safe HMI operation. |
Use Scenario: Consolidating discrete sensor alerts (e.g., oil pressure, coolant temp) into a single parallel bus for ECU monitoring. IC Role / Device Role / Timing Role: Parallel output latch holding fault flags until read by host; Q7S supports daisy-chained diagnostics across multiple units. Use Value: Supports distributed architecture with minimal wiring (single SPI bus + daisy chain), reducing harness weight and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHC595BQ-Q100 | CMOS-input thresholds (VIL ≤ 0.9 V, VIH ≥ 2.1 V at VCC = 3 V); wider supply range (2.0–5.5 V) | Suitable for mixed 3.3 V/5 V systems where input voltage scaling is needed; lower static current at 3.3 V | Select when interfacing with 3.3 V logic or requiring broader VCC flexibility; not TTL-compatible |
| SN74HC595QPWRQ1 | TI's AEC-Q100 Grade 1 variant; identical function but different pinout (SOIC-16), higher IOL (−20 mA), no Q7S pin | Lacks serial output for cascading; requires external buffering for multi-device chains | Choose when board space permits SOIC and daisy-chaining is unnecessary; offers stronger drive for direct LED driving |
Compared with 74AHC595BQ-Q100, the AHCT version ensures guaranteed TTL-level compatibility at 5 V, while SN74HC595QPWRQ1 trades cascading capability for higher output current - making 74AHCT595BQ-Q100 optimal for SPI-driven, multi-stage automotive I/O expansion where signal integrity and daisy-chain scalability are essential.
Availability
74AHCT595BQ-Q100 is available at Aetrix Electronics and suitable for automotive LED driver interfaces, body control module I/O expansion, dashboard switch scanning, and engine bay sensor data aggregation requiring stable component supply across extended temperature ranges.
Supply support for 74AHCT595BQ-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 leading semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.
This device belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust serial-to-parallel conversion in harsh environments - emphasizing AEC-Q100 compliance, thermal resilience, and long-term supply stability.
FAQ
Can 74AHCT595BQ-Q100 operate at 3.3 V supply?
No. The 74AHCT595BQ-Q100 is specified only for 4.5 V to 5.5 V operation per Table 5. Its TTL-compatible inputs require minimum 2.0 V VIH and are not guaranteed functional below 4.5 V supply. For 3.3 V systems, use the pin-compatible 74AHC595BQ-Q100 variant instead.
What is the function of the thermal pad on the DHVQFN16 package?
The exposed thermal pad (terminal 1 index area) has no electrical function. Per datasheet note, it may remain floating or be connected to GND - but must not be electrically tied to any signal net. Its purpose is thermal conduction to the PCB, improving power dissipation and junction temperature stability in automotive environments.
How does MR interact with the storage register during operation?
MR asynchronously resets only the 8-bit shift register; it has no effect on the storage register contents or parallel outputs (Q0–Q7). The storage register retains its last transferred data until the next STCP rising edge, ensuring output stability during shift register clearing.
Is Q7S output registered or combinatorial relative to SHCP?
Q7S is a registered output: it reflects the value of Q7 *after* the shift register has advanced on the preceding SHCP rising edge. As shown in Fig. 6 and Table 7, Q7S propagation delay (tpd) is measured from SHCP to Q7S, confirming synchronous, edge-triggered behavior - not transparent or combinational.
74AHCT595BQ-Q100,1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DHVQFN (2.5x3.5)
74AHCT595BQ-Q100,1 FAQ
1.How can I place an order for 74AHCT595BQ-Q100,1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT595BQ-Q100,1 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 74AHCT595BQ-Q100,1 reliable?
The price and inventory of 74AHCT595BQ-Q100,1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT595BQ-Q100,1 is usually 5 days.
3.What payment methods are accepted for 74AHCT595BQ-Q100,1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT595BQ-Q100,1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT595BQ-Q100,1?
74AHCT595BQ-Q100,1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT595BQ-Q100,1 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 74AHCT595BQ-Q100,1?
For technical support, including 74AHCT595BQ-Q100,1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT595BQ-Q100,1 requirements.
6.How does Aetrix verify that 74AHCT595BQ-Q100,1 is sourced from the original manufacturer or authorized distributors?
All 74AHCT595BQ-Q100,1 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 74AHCT595BQ-Q100,1 meets industry standards.
7.What is the process for return or replacement of 74AHCT595BQ-Q100,1?
All 74AHCT595BQ-Q100,1 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT595BQ-Q100,1, 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 74AHCT595BQ-Q100,1 part is unused and in its original packaging.
Return procedure for 74AHCT595BQ-Q100,1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT595BQ-Q100,1 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
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HEF4094BT,653
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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.
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SN74LV165APWR
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74HC595BQ,115
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74HC165BQ,115
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CD4094BPWR
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