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Nexperia USA Inc. 74HC245PW,118
- Part No.:
- 74HC245PW,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HC245PW,118.pdf
- Description:
- IC TXRX NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,103
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Product details
Overview
74HC245PW,118 from Nexperia is an octal 3-state bidirectional bus transceiver with non-inverting outputs, direction control (DIR) and active-low output enable (OE), operating from 2.0 V to 6.0 V supply, supporting data transfer between two 8-bit buses in microcontroller peripheral interfaces, memory expansion, and logic-level translation in industrial control systems.
For engineers reviewing the 74HC245PW,118 datasheet, 74HC245PW,118 pinout, 74HC245PW,118 application, or 74HC245PW,118 equivalent, this device is selected for high-noise-immunity bidirectional data buffering where CMOS-level input compatibility, low static current (≤160 μA at 125 °C), and TSSOP20 packaging for space-constrained PCB layouts are critical design requirements.
Technical Context
The 74HC245PW,118 implements a dual-bus interface using complementary MOS logic, with DIR controlling signal flow direction (A→B or B→A) and OE enabling/disabling all outputs simultaneously into high-impedance state. Its inputs include clamp diodes, permitting safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
It operates across -40 °C to +125 °C, supports 15 pF load capacitance, and delivers propagation delays as low as 7 ns (VCC = 6.0 V), with enable/disable times under 38 ns and transition times ≤15 ns - optimized for synchronous bus handshaking in embedded controllers and FPGA I/O expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters |
| Propagation Delay (tpd) | 7 ns (VCC = 6.0 V, CL = 15 pF) - ensures timing compliance in 50+ MHz bus cycles |
| Output Drive Strength | ±7.8 mA (VOH/VOL @ VCC = 6.0 V) - sufficient to drive standard TTL/CMOS loads and 15 pF traces |
| Input Thresholds (74HC) | VIH = 4.2 V, VIL = 1.8 V @ VCC = 6.0 V - provides >1.2 V noise margin against rail-to-rail switching transients |
| Quiescent Supply Current | 160 μA max @ +125 °C - minimizes standby power in thermally stressed industrial environments |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 Level 3 for board-level robustness |
| Operating Temperature | -40 °C to +125 °C - qualified for extended-range industrial and automotive under-hood auxiliary circuits |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-pin, 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 A-side signals to B-side; HIGH routes B-side to A-side - enables full-duplex bus arbitration |
| 2–9 (A0–A7) | Port A data I/O | 8-bit bidirectional data path connected to microcontroller or FPGA local bus |
| 10 (GND) | Ground reference | 0 V return for all internal logic and output drivers - must be low-inductance connection |
| 11–18 (B0–B7) | Port B data I/O | 8-bit bidirectional data path connected to memory, peripheral, or external bus segment |
| 19 (OE) | Active-low output enable | LOW enables transceiver; HIGH forces all A/B pins into high-Z - essential for bus contention avoidance |
| 20 (VCC) | Positive supply | 2.0–6.0 V power rail - requires local 100 nF ceramic decoupling adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional bus interface | Single-package replacement for eight discrete unidirectional buffers - reduces layout area and routing complexity |
| CMOS-level input compatibility | VIH/VIL thresholds track VCC proportionally - eliminates need for external biasing in mixed-voltage systems |
| Clamp diode-equipped inputs | Enables safe overvoltage tolerance up to VCC + 0.5 V with series resistors - simplifies interface to legacy 5 V peripherals on 3.3 V hosts |
| High noise immunity | Typical noise margin >1.2 V at VCC = 6.0 V - suppresses false triggering from EFT bursts or crosstalk in dense PCBs |
| JEDEC-compliant pinout | Matches industry-standard 74-series footprint - allows drop-in substitution in existing designs using SO20 or TSSOP20 sockets |
Applications
| Industrial PLC Backplane Interface | Microcontroller Memory Expansion |
|---|---|
Use Scenario: Bidirectional data exchange between ARM Cortex-M7 MCU and parallel SRAM/Flash on a modular I/O backplane. IC Role / Device Role / Timing Role: Bus transceiver isolating MCU address/data bus from backplane segments while synchronizing with WAIT# handshake signals. Use Value: Enables deterministic 8-bit parallel transfers at 25 MHz with <38 ns enable/disable latency, reducing bus arbitration overhead by 40% vs. software-controlled GPIO toggling. |
Use Scenario: Expanding 8-bit data bus of RISC-V SoC to external EEPROM and LCD controller in portable HMI unit. IC Role / Device Role / Timing Role: Direction-controlled buffer managing read/write direction between SoC and peripheral devices sharing same data lines. Use Value: Eliminates need for separate tristate logic and direction latches, cutting BOM count by 3 components and saving 12 mm² PCB area. |
| FPGA I/O Voltage Translation | Legacy Peripheral Interfacing |
Use Scenario: Level-shifting between 3.3 V FPGA I/O banks and 5 V industrial sensor modules with open-collector outputs. IC Role / Device Role / Timing Role: Bidirectional voltage translator with CMOS input thresholds compatible with both 3.3 V and 5 V logic families. Use Value: Achieves rail-to-rail signal integrity without external pull-ups or level-shift ICs, maintaining <15 ns transition time across voltage domains. |
Use Scenario: Connecting modern 3.3 V microcontroller to legacy 5 V UART transceivers and keypad matrix in building automation panel. IC Role / Device Role / Timing Role: Bus buffer providing electrical isolation and direction control between mismatched voltage domains. Use Value: Prevents damage from 5 V inputs via integrated clamp diodes and series resistor support, extending field-replaceable module lifetime by >5 years. |
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,118 | TTL-compatible inputs (VIH = 2.0 V min), identical pinout and timing | Better suited for mixed 5 V TTL/CMOS systems requiring guaranteed recognition of 3.5 V logic highs | Select when interfacing with legacy 5 V TTL peripherals where 74HC input thresholds may cause marginal VIH detection |
| SN74LVC245APW | Lower VCC range (1.65–3.6 V), higher drive (±24 mA), different pinout (DIR/OE swapped) | Optimized for 1.8 V/3.3 V only systems; not pin-compatible; requires PCB redesign | Choose only for new 3.3 V-only designs needing higher sink/source capability and lower propagation delay (5.3 ns) |
Compared with 74HCT245PW,118, the 74HC245PW,118 offers superior noise margin in pure CMOS systems but lacks TTL input compatibility; versus SN74LVC245APW, it supports wider voltage operation and drop-in replacement in legacy footprints but trades off speed and drive strength.
Availability
74HC245PW,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, microcontroller memory expansion, FPGA I/O translation, and legacy peripheral interfacing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC245PW,118 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, analog, and MOSFET solutions with focus on reliability, efficiency, and miniaturization for industrial, automotive, and consumer applications.
The 74HC245PW,118 belongs to Nexperia's 74HC logic family, engineered for low-power, high-noise-immunity digital interfacing in space- and energy-constrained embedded systems operating across harsh thermal environments.
FAQ
Can the 74HC245PW,118 operate reliably at 2.0 V supply?
Yes - the 74HC245PW,118 is fully specified down to 2.0 V supply voltage per JEDEC JESD7A, with guaranteed VIH ≥1.5 V and VOL ≤0.26 V at 6.0 mA load. Propagation delay increases to 90 ns at 2.0 V, making it suitable for low-speed battery-powered monitoring nodes where ultra-low quiescent current (<10 μA typical) is prioritized over speed.
What is the function of the exposed thermal pad on the TSSOP20 package?
The exposed pad on SOT360-1 is non-electrical and mechanically optional - Nexperia specifies no electrical or mechanical requirement to solder it. If soldered, the land must remain floating or connect to GND; doing so improves thermal resistance by ~15 °C/W but does not affect electrical performance or pin compatibility.
How does the 74HC245PW,118 handle input voltages above VCC?
Its inputs feature integrated clamp diodes to VCC and GND. When an input exceeds VCC by >0.5 V, the upper diode conducts, limiting voltage to VCC + 0.5 V. A series current-limiting resistor (e.g., 1 kΩ) must be used to restrict IIK to ≤±20 mA, enabling safe interfacing with 5 V signals on a 3.3 V-powered device.
Is the 74HC245PW,118 pin-compatible with SO20 and DHVQFN20 variants?
Yes - all package variants (SO20/SOT163-1, TSSOP20/SOT360-1, DHVQFN20/SOT764-1) share identical pin numbering and signal assignment per functional diagram and Table 2. Mechanical dimensions differ, but schematic symbols and netlist connectivity remain interchangeable across packages.
74HC245PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- 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:
- 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,118 FAQ
1.How can I place an order for 74HC245PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC245PW,118 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,118 reliable?
The price and inventory of 74HC245PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC245PW,118 is usually 5 days.
3.What payment methods are accepted for 74HC245PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC245PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC245PW,118?
74HC245PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC245PW,118 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,118?
For technical support, including 74HC245PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC245PW,118 requirements.
6.How does Aetrix verify that 74HC245PW,118 is sourced from the original manufacturer or authorized distributors?
All 74HC245PW,118 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,118 meets industry standards.
7.What is the process for return or replacement of 74HC245PW,118?
All 74HC245PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC245PW,118, 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,118 part is unused and in its original packaging.
Return procedure for 74HC245PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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