My Inquiry
My Account
Nexperia USA Inc. 74AHCT245BQ-Q100X
- Part No.:
- 74AHCT245BQ-Q100X
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74AHCT245BQ-Q100X.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,351
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AHCT245BQ-Q100 from Nexperia is an automotive-grade octal bus transceiver with 3-state outputs, direction control (DIR), and active-low output enable (OE). It operates across 4.5 V to 5.5 V supply, supports bidirectional data flow between A- and B-buses, tolerates 5.5 V inputs regardless of VCC, and is qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C) for engine control units and ADAS domain controllers.
For engineers reviewing the 74AHCT245BQ-Q100 datasheet, 74AHCT245BQ-Q100 pinout, 74AHCT245BQ-Q100 application, or 74AHCT245BQ-Q100 equivalent, key selection criteria include TTL-compatible input thresholds, 7.7 ns typical propagation delay at 5 V/15 pF, overvoltage-tolerant inputs enabling mixed-voltage interfacing, and DHVQFN20 package compatibility with AOI-enabled automotive PCB assembly.
Technical Context
This device implements a dual-bus, bidirectional 8-bit data path controlled by DIR and OE signals: DIR selects direction (A→B or B→A), while OE disables all outputs into high-impedance 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 systems.
It features Schmitt-trigger inputs for noise immunity, CMOS output stages with ±8 mA drive capability, and overvoltage-tolerant inputs rated to 5.5 V-enabling safe interfacing between 3.3 V and 5 V domains without level shifters. The DHVQFN20 package provides thermal enhancement and side-wettable flanks for automated optical inspection in automotive production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation in automotive 5 V rail environments with ±10 % tolerance. |
| Propagation Delay (tpd) | 3.5 ns (typ) / 10.0 ns (max) at 5 V, 15 pF - Enables high-speed bus bridging in real-time control loops. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Matches standard TTL logic, eliminating need for external translators. |
| Output Drive | ±8 mA at VOH/VOL - Sufficient to drive 50 Ω transmission lines or multiple CMOS loads in distributed ECUs. |
| Operating Temperature | −40 °C to +125 °C - Qualified per AEC-Q100 Grade 1 for under-hood and powertrain applications. |
| Input Overvoltage Tolerance | 5.5 V absolute max - Allows direct connection to 5 V buses while powered from 3.3 V, reducing BOM count. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Meets stringent automotive ESD robustness requirements for manufacturing and field use. |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, no leads, 20 terminals, side-wettable flanks for AOI, thermal pad (non-soldered or floating/grounded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | High = B-to-A data flow; Low = A-to-B - Enables dynamic bus arbitration in multi-master architectures. |
| 2–9 (A0–A7) | Port A data I/O | Bidirectional data pins for one bus segment; internally connected to transceiver core with 3-state output buffers. |
| 10 (GND) | Ground reference | 0 V reference for all signals; thermal pad underneath is electrically isolated unless explicitly grounded. |
| 11–18 (B7–B0) | Port B data I/O | Reversed pin order (B7=11, B0=18) matches functional grouping; supports compact routing in dense layouts. |
| 19 (OE) | Active-low output enable | Low = outputs enabled; High = all A/B pins enter high-Z - Critical for bus sharing and hot-swap isolation. |
| 20 (VCC) | Power supply | Primary 4.5–5.5 V supply; decoupling required within 3 mm of pin for noise-sensitive automotive operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C operation with full electrical testing per automotive stress standards. |
| TTL-compatible input levels | VIH ≤ 2.0 V and VIL ≥ 0.8 V at 5 V supply - Direct interface with legacy microcontrollers and FPGAs without level-shifting. |
| Overvoltage-tolerant inputs | Withstands up to 5.5 V on any input pin independent of VCC - Enables safe 5 V signal injection into 3.3 V-powered systems. |
| Schmitt-trigger inputs | Hysteresis ≥ 0.3 V - Rejects fast transient noise on CAN/LIN auxiliary lines or sensor interfaces in noisy vehicle environments. |
| DHVQFN20 with side-wettable flanks | Enables automated optical inspection of solder joints - Required for zero-defect automotive PCB assembly traceability. |
Applications
| Engine Control Unit (ECU) Bus Interface | ADAS Camera Sensor Hub |
|---|---|
|
Use Scenario: Bridging SPI-configured microcontroller (3.3 V) to legacy 5 V CAN transceiver PHY layer. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing clock-synchronous data handoff between domains. Use Value: Eliminates discrete level shifters; maintains <10 ns timing margin for ISO 11898-2 compliant bit sampling windows. |
Use Scenario: Aggregating parallel LVDS image data streams from dual 5 MP cameras into a 3.3 V SoC vision processor. IC Role / Device Role / Timing Role: Synchronized 8-bit data latch and bus isolator enabling concurrent read/write on shared memory-mapped interface. Use Value: Provides 5.5 V-tolerant inputs to accept camera-side 5 V strobes while operating from SoC 3.3 V rail - reduces interposer complexity. |
| Body Control Module (BCM) Gateway | Electric Power Steering (EPS) Motor Driver Interface |
|
Use Scenario: Isolating LIN master MCU from multiple 5 V sensor nodes during firmware updates. IC Role / Device Role / Timing Role: 3-state-enabled bus buffer preventing backfeed during partial system resets. Use Value: OE-controlled high-Z state ensures uninterrupted LIN communication on other nodes during reprogramming sequences. |
Use Scenario: Interfacing 5 V position encoder feedback signals to 3.3 V motor control MCU in torque-sensing loop. IC Role / Device Role / Timing Role: Robust signal translator with Schmitt-trigger inputs rejecting PWM-induced encoder noise. Use Value: 0.3 V hysteresis suppresses >100 MHz switching noise from adjacent inverter stages - improves position resolution stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74AHCT245PW-Q100 | TSSOP20 package (4.4 mm width); no side-wettable flanks; 100 °C max junction derating point | Suitable for non-AOI production or space-constrained non-automotive industrial boards | Select when AOI is not required and board area allows wider footprint than DHVQFN. |
| SN74LVC245AQPWRQ1 | Lower VCC range (1.65–3.6 V); LVTTL inputs; 3.3 V only; no 5.5 V overvoltage tolerance | Designed for pure 3.3 V domains; incompatible with 5 V signal injection | Choose only for 3.3 V-only systems where cost-per-pin is prioritized over mixed-voltage flexibility. |
Compared with 74AHCT245PW-Q100, the BQ variant offers superior manufacturability in automotive AOI lines and higher thermal performance; versus SN74LVC245AQPWRQ1, it delivers essential 5 V tolerance and TTL compatibility critical for legacy automotive subsystem integration.
Availability
74AHCT245BQ-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS sensor hubs, and body control modules requiring stable component supply across extended temperature ranges and automotive production lifecycles.
Supply support for 74AHCT245BQ-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 MOSFET solutions for automotive, industrial, and consumer markets.
The 74AHCT-Q100 series is designed specifically for automotive applications demanding AEC-Q100 qualification, wide temperature operation, and robust mixed-voltage interfacing - targeting ECU, gateway, and ADAS subsystems.
FAQ
Is the thermal pad on the DHVQFN20 package required to be soldered?
No - the exposed thermal pad (pin 10) is electrically isolated and has no mandatory solder requirement. If soldered, it must remain floating or be connected to GND per layout guidelines; improper grounding can cause signal integrity issues due to parasitic coupling.
Can 74AHCT245BQ-Q100 operate with VCC = 3.3 V?
No - the 74AHCT245 variant requires VCC between 4.5 V and 5.5 V to meet its TTL input threshold specifications (VIH ≥ 2.0 V, VIL ≤ 0.8 V). At 3.3 V, input recognition fails; use 74AHC245BQ-Q100 instead for CMOS-level 3.3 V operation.
What is the maximum capacitive load this device can drive reliably?
It is characterized up to 50 pF (per Table 7), with guaranteed tpd ≤ 11.0 ns at 5 V. Driving >50 pF increases propagation delay nonlinearly and may violate setup/hold margins in high-speed interfaces; add series termination or buffer stages beyond this limit.
Does OE being active-low mean it must be pulled down to enable outputs?
Yes - OE must be driven LOW (≤0.8 V) to enable A/B port drivers. Leaving OE floating is unsafe: internal leakage may cause partial enablement and bus contention. Use a 10 kΩ pull-down resistor or active driver in all production designs.
74AHCT245BQ-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:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74AHCT245BQ-Q100X FAQ
1.How can I place an order for 74AHCT245BQ-Q100X through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT245BQ-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 74AHCT245BQ-Q100X reliable?
The price and inventory of 74AHCT245BQ-Q100X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT245BQ-Q100X is usually 5 days.
3.What payment methods are accepted for 74AHCT245BQ-Q100X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT245BQ-Q100X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT245BQ-Q100X?
74AHCT245BQ-Q100X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT245BQ-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 74AHCT245BQ-Q100X?
For technical support, including 74AHCT245BQ-Q100X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT245BQ-Q100X requirements.
6.How does Aetrix verify that 74AHCT245BQ-Q100X is sourced from the original manufacturer or authorized distributors?
All 74AHCT245BQ-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 74AHCT245BQ-Q100X meets industry standards.
7.What is the process for return or replacement of 74AHCT245BQ-Q100X?
All 74AHCT245BQ-Q100X units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT245BQ-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 74AHCT245BQ-Q100X part is unused and in its original packaging.
Return procedure for 74AHCT245BQ-Q100X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT245BQ-Q100X Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
