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Nexperia USA Inc. 74HC245PW,112
- Part No.:
- 74HC245PW,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HC245PW,112.pdf
- Description:
- IC TXRX NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:538
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Product details
Overview
74HC245PW,112 from Nexperia is an octal 3-state bidirectional bus transceiver with non-inverting outputs, direction control (DIR), and active-low output enable (OE). It operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and delivers propagation delay as low as 7 ns at VCC = 6.0 V. It enables level-shifted data exchange between microcontroller buses and peripheral subsystems in industrial I/O modules.
For engineers reviewing the 74HC245PW,112 datasheet, 74HC245PW,112 pinout, 74HC245PW,112 application, or 74HC245PW,112 equivalent, this device is selected for high-noise-immunity bidirectional data routing where CMOS-level input compatibility, low static current (<160 μA), and TSSOP20 thermal performance are critical in space-constrained embedded designs.
Technical Context
The 74HC245PW,112 implements a dual-bus interface using complementary CMOS logic, with DIR controlling data flow direction (A→B or B→A) and OE enabling/disabling all eight outputs simultaneously into high-impedance state. Its input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
It complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), achieves >100 mA latch-up immunity per JESD78 Class II Level B, and provides HBM ESD protection exceeding 2000 V and CDM protection exceeding 1000 V - confirming robustness in mixed-voltage board-level environments.
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 50 MHz+ synchronous bus systems |
| Output drive | ±35 mA per output - sufficient to drive 50 pF loads with <15 ns transition time across full temperature range |
| Static supply current | 160 μA (max) at -40 °C to +125 °C - ensures ultra-low power retention in always-on industrial controllers |
| Input threshold | VIL = 1.8 V, VIH = 4.2 V at VCC = 6.0 V - provides >1.2 V noise margin for CMOS-compatible signaling |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood and factory-floor applications without derating |
| Power dissipation | 500 mW (TSSOP20 package) - allows sustained 8-bit bidirectional throughput in thermally constrained PCB layouts |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1); 20-lead, 4.4 mm body width, 0.65 mm pitch; exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW routes data from A-side to B-side; HIGH routes from B-side to A-side - enables single-wire bus arbitration |
| 2–9 (A0–A7) | Port A data I/O | Bidirectional data terminals on side A; internally isolated when OE = HIGH - supports shared bus topology |
| 10 (GND) | Ground reference | Primary 0 V return path; decoupling capacitor must be placed within 3 mm for stable switching noise suppression |
| 11–18 (B0–B7) | Port B data I/O | Bidirectional data terminals on side B; electrically identical to A-port but physically separated for layout isolation |
| 19 (OE) | Output enable (active LOW) | Drives all 16 I/Os into high-Z state when HIGH - essential for multi-master bus contention avoidance |
| 20 (VCC) | Positive supply | Must be bypassed with 100 nF ceramic capacitor near pin; regulates internal logic thresholds and output drive strength |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2.0 V to 6.0 V operation - eliminates need for separate 3.3 V/5 V regulators in mixed-voltage systems |
| High noise immunity | Typical 40 % VCC noise margin at VCC = 4.5 V - prevents false triggering in electrically noisy PLC backplanes |
| Input clamp diodes | Integrated diodes to VCC and GND - permits safe connection of A/B ports to external signals up to 6.5 V with series resistor |
| Thermal enhancement | TSSOP20 package with 10.0 mW/K derating above 100 °C - sustains full-speed operation in sealed enclosures |
| JEDEC compliance | JESD7A and JESD8C certified - guarantees interoperability with industry-standard logic families and test equipment |
Applications
| Industrial PLC Backplane Interface | Microcontroller Expansion Bus Bridge |
|---|---|
|
Use Scenario: Bidirectional data transfer between ARM Cortex-M7 host and isolated I/O module over 200 mm PCB trace run. IC Role / Device Role / Timing Role: Bus transceiver managing A/B port direction under software control while maintaining signal integrity across noisy 24 V DC field wiring zones. Use Value: 7 ns propagation delay and 10 pF I/O capacitance minimize timing skew; ±35 mA drive ensures clean edges into 50 pF distributed load. |
Use Scenario: Extending GPIO count of ESP32-WROVER via parallel 8-bit data latch synchronized to SPI clock domain. IC Role / Device Role / Timing Role: Level-shifting transceiver isolating ESP32's 3.3 V I/O from 5 V peripheral address/data bus during memory-mapped access. Use Value: CMOS input thresholds and 2.0–6.0 V supply range eliminate external level shifters; OE pin enables precise bus release timing. |
| Automated Test Equipment (ATE) Signal Routing | Legacy ISA Bus Adapter Module |
|
Use Scenario: Reconfigurable signal path between FPGA-based pattern generator and DUT socket with dynamic polarity inversion. IC Role / Device Role / Timing Role: Direction-controlled bidirectional buffer enabling real-time test vector injection and response capture on same pins. Use Value: DIR-controlled A↔B routing and sub-15 ns transition time support 20 MHz test clock rates; high-Z state prevents bus contention during reconfiguration. |
Use Scenario: Interfacing modern microcontroller to legacy ISA slot for retro-computing hardware emulation. IC Role / Device Role / Timing Role: Octal transceiver translating between 3.3 V controller logic and 5 V ISA data bus while preserving signal polarity. Use Value: Non-inverting architecture maintains ISA protocol timing; -40 °C to +125 °C rating ensures reliability in unventilated chassis environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT245PW,112 | TTL-compatible inputs (VIH = 2.0 V min), otherwise identical pinout, timing, and drive | Required when interfacing with legacy 5 V TTL outputs lacking CMOS voltage margins | Select only if driving source is standard TTL; otherwise 74HC245PW,112 offers superior noise immunity |
| SN74LVC245APWR | 3.3 V only (1.65–3.6 V), lower propagation delay (5.3 ns), higher drive (±24 mA), different pinout | Suitable for modern low-voltage SoC interconnects but incompatible with 5 V buses or existing PCB footprints | Choose for new 3.3 V designs prioritizing speed/power; not a drop-in replacement for 74HC245PW,112 |
Compared with 74HCT245PW,112, the 74HC245PW,112 provides higher noise immunity and wider supply flexibility, while SN74LVC245APWR trades voltage range for speed and lower power - making each optimal for distinct voltage-domain and legacy-compatibility requirements.
Availability
74HC245PW,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, microcontroller expansion interfaces, automated test equipment signal routing, and legacy ISA bus adapter modules requiring stable component supply across extended temperature ranges.
Supply support for 74HC245PW,112 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 focused on high-volume, high-reliability logic, analog, and discrete components, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 74HC245PW,112 belongs to Nexperia's HC-series logic family, engineered for robust bidirectional data transfer in noise-prone industrial control and instrumentation systems where wide VCC tolerance and thermal resilience are mandatory.
FAQ
Can 74HC245PW,112 interface directly between 3.3 V and 5 V logic domains?
Yes - its 2.0 V to 6.0 V supply range allows operation at either 3.3 V or 5 V. When powered at 3.3 V, it accepts 5 V-tolerant inputs via internal clamp diodes (with current-limiting resistors), and when powered at 5 V, it drives 5 V logic levels directly. Output voltage swing tracks VCC, so level translation requires external resistive or active circuitry only for bidirectional voltage mismatch.
What is the maximum capacitive load the 74HC245PW,112 can drive while maintaining specified timing?
The datasheet specifies dynamic characteristics up to 50 pF load capacitance. At VCC = 6.0 V, propagation delay remains ≤15 ns and transition time ≤15 ns with CL = 50 pF and RL = 1 kΩ. Driving >50 pF increases delay nonlinearly and may cause overshoot; for >100 pF loads, add series termination or reduce edge rate via gate resistance.
How does the DIR pin behave during power-up or brown-out conditions?
DIR has no internal pull-up/down; its state is undefined until externally biased. During power ramp-up, outputs remain in high-impedance if OE is held HIGH, but uncontrolled DIR transitions may cause momentary bus contention. Design best practice is to tie DIR to a known state (e.g., via 10 kΩ pull-down to GND) and assert OE HIGH until VCC stabilizes and firmware initializes direction control.
Is the exposed pad on the TSSOP20 package electrically connected or thermally functional?
No - the exposed pad in SOT360-1 (TSSOP20) is not electrically connected to any internal node and has no thermal vias specified in the package drawing. It may be left floating or soldered to a non-functional copper pour for mechanical stability, but it provides no electrical or thermal benefit. Thermal performance relies solely on lead-frame conduction through pins 1–20.
74HC245PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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-TSSOP
74HC245PW,112 FAQ
1.How can I place an order for 74HC245PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC245PW,112 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 74HC245PW,112 reliable?
The price and inventory of 74HC245PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC245PW,112 is usually 5 days.
3.What payment methods are accepted for 74HC245PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC245PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC245PW,112?
74HC245PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC245PW,112 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 74HC245PW,112?
For technical support, including 74HC245PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC245PW,112 requirements.
6.How does Aetrix verify that 74HC245PW,112 is sourced from the original manufacturer or authorized distributors?
All 74HC245PW,112 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 74HC245PW,112 meets industry standards.
7.What is the process for return or replacement of 74HC245PW,112?
All 74HC245PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC245PW,112, 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 74HC245PW,112 part is unused and in its original packaging.
Return procedure for 74HC245PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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