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Nexperia USA Inc. 74HC245D,652
- Part No.:
- 74HC245D,652
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HC245D,652.pdf
- Description:
- IC TXRX NON-INVERT 6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,995
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Product details
Overview
74HC245D,652 from Nexperia is an octal 3-state bidirectional bus transceiver with non-inverting outputs, direction control (DIR) and active-low output enable (OE), operating across 2.0 V to 6.0 V supply, supporting ±35 mA output drive, and rated for -40 °C to +125 °C ambient temperature - used for level-shifting and bus isolation in industrial microcontroller peripheral interfaces.
For engineers reviewing the 74HC245D,652 datasheet, 74HC245D,652 pinout, 74HC245D,652 application, or 74HC245D,652 equivalent, this device is selected for high-noise-immunity bidirectional data routing between mismatched voltage domains, where CMOS-level input compatibility, low static current (≤160 μA at 125 °C), and sub-30 ns propagation delay at 4.5 V are critical design requirements.
Technical Context
The 74HC245D,652 implements a dual-bus architecture with eight independent bidirectional channels, each controlled by a shared DIR signal to determine data flow direction (A→B or B→A) and a common OE input to place all outputs in high-impedance state. Its CMOS input structure provides rail-to-rail voltage tolerance with integrated clamp diodes enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
It operates under JEDEC JESD7A compliance (2.0 V–6.0 V), delivers VOH ≥3.98 V and VOL ≤0.26 V at 6.0 mA load (VCC = 4.5 V), and maintains latch-up immunity >100 mA per JESD78 Class II Level B - making it suitable for mixed-voltage board-level interconnects requiring robust ESD resilience (HBM >2000 V, CDM >1000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.0 V to 6.0 V - supports direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Propagation delay | 7 ns (typ) at VCC = 6.0 V - enables reliable operation in 25 MHz+ parallel bus systems. |
| Output drive | ±35 mA - sufficient to drive 50 pF loads with <30 ns transition times, meeting TTL/CMOS fan-out requirements. |
| Input threshold | VIL ≤0.8 V, VIH ≥1.5 V at VCC = 2.0 V - ensures noise margin >0.5 V in low-voltage embedded applications. |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood automotive modules and industrial PLC backplanes. |
| Power dissipation | 500 mW (SO20 package) - derates linearly above 109 °C, enabling thermal-aware PCB layout in dense designs. |
| ESD rating | HBM >2000 V, CDM >1000 V - exceeds IEC 61000-4-2 system-level ESD immunity baseline for industrial equipment. |
Pinout & Package
74HC245D,652 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads, JEDEC MS-013 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW routes data from A-side to B-side; HIGH reverses flow - enables single-wire bus arbitration in half-duplex systems. |
| 2–9 (A0–A7) | Port A bidirectional I/O | Connects to microcontroller or ASIC data bus; clamped inputs tolerate overvoltage during hot-swap or power sequencing. |
| 10 (GND) | Ground reference | Primary return path for all internal logic and output drivers; must be low-impedance to minimize ground bounce. |
| 11–18 (B0–B7) | Port B bidirectional I/O | Interfaces to memory, peripheral ICs, or external connectors; identical electrical characteristics to A-side pins. |
| 19 (OE) | Active-low output enable | Drives all outputs to high-impedance when HIGH - essential for multi-master bus contention avoidance. |
| 20 (VCC) | Supply voltage | Accepts 2.0–6.0 V; decoupling capacitor (100 nF) required within 5 mm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2.0 V to 6.0 V operation eliminates need for separate voltage translators in mixed-supply systems. |
| Clamp diode protection | Integrated input diodes allow safe connection to signals up to VCC + 0.5 V using series resistors - prevents damage during hot-plug events. |
| High noise immunity | Typical noise margin >0.5 V at 2.0 V supply - sustains reliable operation in electrically noisy motor-control or power-conversion environments. |
| 3-state output control | Single OE pin disables all 16 I/O lines simultaneously - simplifies bus arbitration logic and reduces gate count in FPGA/CPLD designs. |
| JEDEC-compliant timing | tpd ≤27 ns (max) at VCC = 4.5 V, CL = 15 pF - meets setup/hold timing budgets for 20 MHz synchronous parallel buses. |
Applications
| Industrial PLC Backplane | Microcontroller Peripheral Expansion |
|---|---|
|
Use Scenario: Isolating CPU address/data bus from modular I/O cards in a DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Bidirectional bus buffer managing data flow between ARM Cortex-M7 host and isolated RS-485, analog input, and relay driver modules. Use Value: Enables hot-swappable card insertion without bus contention, leveraging OE-controlled tristate to prevent signal collisions during module power-up. |
Use Scenario: Extending GPIO count and driving off-board peripherals (LCD, keypad, EEPROM) from a resource-constrained 8-bit MCU. IC Role / Device Role / Timing Role: Level-shifting transceiver translating 3.3 V MCU signals to 5 V peripheral logic while providing drive strength beyond MCU pin limits. Use Value: Delivers ±35 mA per line - sufficient to drive 10 TTL loads or 50 pF capacitive bus segments without external buffers. |
| Automotive Body Control Module | Test Equipment Signal Routing |
|
Use Scenario: Interfacing infotainment SoC (1.8 V I/O) with legacy CAN/LIN transceivers and sensor hubs operating at 5 V. IC Role / Device Role / Timing Role: Voltage-domain translator and bus isolator ensuring signal integrity across mixed-voltage subsystems in vehicle ECU designs. Use Value: -40 °C to +125 °C rating and >2000 V HBM ESD withstand support AEC-Q100-relevant reliability in non-automotive-qualified but thermally rugged applications. |
Use Scenario: Configurable signal path selection in automated test fixtures routing DUT I/O to measurement instruments or stimulus sources. IC Role / Device Role / Timing Role: Reconfigurable bidirectional switch enabling dynamic test vector injection and response capture on shared probe interfaces. Use Value: DIR and OE pins allow real-time reconfiguration of data direction and bus release - reducing fixture wiring complexity and test cycle time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT245D,653 | TTL-compatible inputs (VIH = 2.0 V min), otherwise identical pinout, timing, and drive capability. | Better suited for legacy 5 V TTL systems where input thresholds must match standard TTL logic levels. | Select when interfacing with older 74LS/74ALS families or when guaranteed 2.0 V VIH is required at VCC = 4.5 V. |
| SN74LVC245APWR | Lower VCC range (1.65–3.6 V), higher speed (tpd ≤ 5.3 ns @ 3.3 V), but no clamp diodes and reduced ESD rating (HBM = 2000 V). | Optimized for modern low-voltage portable electronics; not suitable for overvoltage-tolerant or industrial-grade designs. | Choose only for battery-powered 3.3 V systems where speed and power efficiency outweigh robustness requirements. |
Compared with 74HCT245D,653 and SN74LVC245APWR, the 74HC245D,652 uniquely balances wide-voltage operation, overvoltage-tolerant inputs, and industrial temperature grading - making it the default choice for mixed-supply industrial control and retrofit applications where reliability and compatibility supersede raw speed.
Availability
74HC245D,652 is available at Aetrix Electronics and suitable for industrial PLC backplanes, microcontroller peripheral expansion, automotive body control modules, and test equipment signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC245D,652 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 efficiency, reliability, and manufacturability in high-volume applications.
The 74HC245D,652 belongs to Nexperia's industry-standard 74HC logic family, engineered for robustness in industrial automation, building control, and instrumentation - emphasizing wide supply range, high noise immunity, and extended temperature operation.
FAQ
Can the 74HC245D,652 interface 3.3 V and 5 V buses simultaneously?
Yes - its 2.0 V to 6.0 V supply range and CMOS input thresholds allow direct connection to both 3.3 V and 5 V logic domains on the same device. Port A can connect to a 3.3 V MCU while Port B drives 5 V peripherals, provided VCC is set to 5 V and appropriate series resistors are used on inputs exceeding VCC.
What is the maximum capacitive load the 74HC245D,652 can drive reliably?
The device is characterized up to 50 pF load capacitance with guaranteed timing (tpd ≤27 ns at VCC = 4.5 V). Driving >50 pF increases propagation delay and transition time; for 100 pF loads, add series termination or reduce clock frequency to maintain timing margins.
Does the 74HC245D,652 require external pull-up or pull-down resistors on DIR or OE?
No - DIR and OE have CMOS-compatible inputs with negligible leakage (<±0.1 μA). However, OE should be actively driven LOW for normal operation; leaving it floating risks undefined output states. A 10 kΩ pull-down on OE is recommended if control logic is absent during power-up.
How does the 74HC245D,652 handle input voltages above VCC?
Its integrated input clamp diodes allow safe operation with inputs up to VCC + 0.5 V when used with current-limiting resistors (≥1 kΩ). Exceeding this violates Absolute Maximum Ratings and may cause permanent damage - external clamping or level-shifting is required beyond that limit.
74HC245D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74HC245D,652 FAQ
1.How can I place an order for 74HC245D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC245D,652 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 74HC245D,652 reliable?
The price and inventory of 74HC245D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC245D,652 is usually 5 days.
3.What payment methods are accepted for 74HC245D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC245D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC245D,652?
74HC245D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC245D,652 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 74HC245D,652?
For technical support, including 74HC245D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC245D,652 requirements.
6.How does Aetrix verify that 74HC245D,652 is sourced from the original manufacturer or authorized distributors?
All 74HC245D,652 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 74HC245D,652 meets industry standards.
7.What is the process for return or replacement of 74HC245D,652?
All 74HC245D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC245D,652, 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 74HC245D,652 part is unused and in its original packaging.
Return procedure for 74HC245D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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