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Nexperia USA Inc. 74AHCT573BQ-Q100X
- Part No.:
- 74AHCT573BQ-Q100X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74AHCT573BQ-Q100X.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,303
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Product details
Overview
74AHCT573BQ-Q100 from Nexperia is an automotive-grade octal D-type transparent latch with 3-state outputs, latch enable (LE) and output enable (OE) control inputs, operating from 4.5 V to 5.5 V supply, supporting -40 °C to +125 °C ambient range, and used in automotive body control modules for bus isolation and data latching between mixed-voltage subsystems.
For engineers reviewing the 74AHCT573BQ-Q100 datasheet, 74AHCT573BQ-Q100 pinout, 74AHCT573BQ-Q100 application, or 74AHCT573BQ-Q100 equivalent, this device delivers TTL-compatible input thresholds, sub-7 ns propagation delay at 5 V/50 pF, overvoltage-tolerant inputs up to 5.5 V, and AEC-Q100 Grade 1 qualification - critical for robust signal integrity in automotive powertrain and chassis electronics.
Technical Context
This latch operates in two distinct functional modes: transparent mode when LE is HIGH (output Qn follows Dn), and latched mode when LE transitions LOW (Qn holds prior Dn value). OE independently controls 3-state output drive, enabling bus sharing without affecting internal latch state.
Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure compatibility with legacy 5 V logic families, while overvoltage-tolerant inputs allow safe interfacing with 5.5 V signals even under 4.5 V supply - a key requirement for automotive domain controllers integrating legacy and modern MCUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 5.5 V - supports stable operation across automotive battery transients (e.g., load dump, cold crank). |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures reliable recognition of TTL-level signals from microcontrollers or sensors. |
| Propagation Delay | tpd = 5.5 ns typ (CL = 50 pF, VCC = 5 V) - enables high-speed data capture in real-time vehicle networks. |
| Output Drive | ±8 mA at VOH/VOL - sufficient to drive multiple CMOS/TTL loads on shared buses without external buffers. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood and transmission control unit environments. |
| AEC-Q100 Grade | Grade 1 - certified for automotive applications per Automotive Electronics Council requirements. |
| Input Overvoltage Tolerance | Up to 5.5 V regardless of VCC - eliminates need for level-shifting circuitry in mixed-voltage domains. |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, side-wettable flanks for AOI-compatible solder joint inspection, thermal-enhanced quad flat no-lead construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground node; electrically isolated thermal pad requires floating or GND connection per layout guidelines. |
| 2–9 | D0–D7 | Asynchronous data inputs; Schmitt-trigger action provides noise immunity on noisy automotive harnesses. |
| 11 | LE | Latch enable (active HIGH); edge-sensitive control for synchronous data capture from parallel buses. |
| 12–19 | Q0–Q7 | 3-state latched outputs; high-impedance OFF-state (Z) enabled by OE allows shared bus arbitration. |
| 10 | OE | Output enable (active LOW); independent of latch state, enabling dynamic bus release without data corruption. |
| 20 | VCC | Primary power supply; decoupling capacitor placement near this pin is mandatory for EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input levels | Enables direct interface with legacy 5 V microcontrollers and sensors without level shifters. |
| Overvoltage-tolerant inputs (5.5 V) | Permits safe connection to 5.5 V signals even when powered from 4.5 V - critical for fault-tolerant automotive designs. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use across full temperature range (-40 °C to +125 °C) and lifetime reliability requirements. |
| Side-wettable flanks (DHVQFN) | Enables automated optical inspection (AOI) of solder joints - essential for zero-defect manufacturing in Tier-1 production. |
| Balanced propagation delays | Minimizes skew between parallel data lines (D0–D7 → Q0–Q7), preserving timing integrity in multi-bit latching. |
Applications
| Body Control Module (BCM) | Instrument Cluster Interface |
|---|---|
Use Scenario: Latching sensor status (door open/closed, seatbelt fastened) before transmission over CAN or LIN bus. IC Role / Device Role / Timing Role: Parallel-to-bus interface latch synchronizing asynchronous mechanical switch inputs to MCU-controlled serial communication. Use Value: Prevents metastability during bus arbitration by holding stable digital states while MCU processes higher-priority tasks. |
Use Scenario: Isolating display driver data paths from main MCU during firmware updates or sleep mode transitions. IC Role / Device Role / Timing Role: 3-state output buffer enabling hot-swap capability and preventing bus contention during display reinitialization. Use Value: Eliminates visual artifacts (ghosting, flicker) by ensuring clean bus release before display controller reset sequences. |
| Power Distribution Unit (PDU) | ADAS Camera Interface |
Use Scenario: Capturing relay control commands from safety-critical MCU before driving high-side switches. IC Role / Device Role / Timing Role: Fault-isolated latch providing deterministic hold time for fail-safe actuator activation signals. Use Value: Guarantees minimum pulse width compliance for ISO 26262 ASIL-B compliant power switching circuits. |
Use Scenario: Buffering parallel image data from image sensor to SoC during high-bandwidth video streaming. IC Role / Device Role / Timing Role: Transparent latch capturing pixel data bursts synchronized to sensor frame clock edges. Use Value: Reduces timing margin pressure on SoC parallel interface by absorbing jitter between sensor and processor clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHC573BQ-Q100 | CMOS input thresholds (VIH = 3.85 V min at VCC = 5.5 V), lower ICC (4 μA typ), wider VCC range (2.0–5.5 V) | Suitable for mixed-voltage systems with 3.3 V MCUs and 5 V peripherals | Select when interfacing with 3.3 V logic families or requiring ultra-low static current. |
| SN74LV573AQPWRQ1 | TTL-compatible inputs, 1.65–5.5 V VCC, higher tpd (10.5 ns typ at 5 V/50 pF), different pinout (TSSOP20 only) | Designed for TI ecosystem compatibility; lacks side-wettable flanks for AOI | Choose if existing PCB uses TI footprint or requires extended low-VCC operation down to 1.65 V. |
Compared with 74AHC573BQ-Q100 and SN74LV573AQPWRQ1, the 74AHCT573BQ-Q100 uniquely combines AEC-Q100 Grade 1 qualification, DHVQFN20 with side-wettable flanks, and strict TTL input compatibility - making it optimal for new automotive designs prioritizing manufacturability, legacy interface support, and under-hood thermal resilience.
Availability
74AHCT573BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, instrument cluster interfaces, power distribution units, and ADAS camera interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT573BQ-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 specializing in high-performance, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.
The 74AHCT573BQ-Q100 belongs to Nexperia's AEC-Q100-qualified automotive logic family, designed specifically for robust signal conditioning, bus isolation, and data latching in harsh-temperature automotive ECUs.
FAQ
What is the maximum clock frequency supported by the 74AHCT573BQ-Q100?
The 74AHCT573BQ-Q100 is not a clocked register but a transparent latch with no internal clock; its effective data rate depends on LE pulse width (minimum 5.0 ns) and propagation delay (5.5 ns typ). It supports burst data rates up to ~100 MHz in transparent mode when driven by fast-edge LE signals and loaded with ≤50 pF.
Can the 74AHCT573BQ-Q100 be used with a 3.3 V microcontroller?
No - the 74AHCT573BQ-Q100 requires VCC ≥4.5 V and has TTL input thresholds (VIH = 2.0 V min), but its inputs are not 3.3 V tolerant when VCC = 4.5–5.5 V. Direct connection to a 3.3 V MCU output risks violating VIH/VIL margins; a level shifter or the pin-compatible 74AHC573BQ-Q100 is required for 3.3 V systems.
Is the thermal pad (pin 1) required to be soldered to ground?
No - the exposed thermal pad (pin 1) has no electrical function per datasheet; it may remain floating or be connected to GND for thermal improvement, but must never be tied to any voltage other than GND or left unconnected with unintended parasitic coupling. Solder land design must follow Nexperia's SOT764-1 layout guidelines.
How does the 74AHCT573BQ-Q100 handle input noise in automotive environments?
It incorporates Schmitt-trigger action on all inputs, providing hysteresis (typ. 0.3–0.5 V) that rejects transient noise spikes up to 50 ns duration. Combined with ±2000 V HBM ESD rating and high noise immunity specs, this ensures reliable operation on long harness runs subject to ignition noise and alternator ripple.
74AHCT573BQ-Q100X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 4.5V ~ 5.5V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 3.5ns
- Current - Output High, Low:
- 8mA, 8mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74AHCT573BQ-Q100X FAQ
1.How can I place an order for 74AHCT573BQ-Q100X through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT573BQ-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 74AHCT573BQ-Q100X reliable?
The price and inventory of 74AHCT573BQ-Q100X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT573BQ-Q100X is usually 5 days.
3.What payment methods are accepted for 74AHCT573BQ-Q100X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT573BQ-Q100X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT573BQ-Q100X?
74AHCT573BQ-Q100X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT573BQ-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 74AHCT573BQ-Q100X?
For technical support, including 74AHCT573BQ-Q100X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT573BQ-Q100X requirements.
6.How does Aetrix verify that 74AHCT573BQ-Q100X is sourced from the original manufacturer or authorized distributors?
All 74AHCT573BQ-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 74AHCT573BQ-Q100X meets industry standards.
7.What is the process for return or replacement of 74AHCT573BQ-Q100X?
All 74AHCT573BQ-Q100X units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT573BQ-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 74AHCT573BQ-Q100X part is unused and in its original packaging.
Return procedure for 74AHCT573BQ-Q100X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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