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Nexperia USA Inc. 74AHC245PW,112
- Part No.:
- 74AHC245PW,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHC245PW,112.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,250
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Product details
Overview
74AHC245PW,112 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and output enable (OE) inputs. It operates from 2.0 V to 5.5 V, supports mixed-voltage translation via overvoltage-tolerant inputs up to 5.5 V, and delivers balanced propagation delays as low as 3.5 ns (VCC = 5 V, CL = 15 pF). It is used in microcontroller I/O expansion, FPGA-to-ASIC data bridging, and level-shifting between 3.3 V and 5 V subsystems.
For engineers reviewing the 74AHC245PW,112 datasheet, 74AHC245PW,112 pinout, 74AHC245PW,112 application, or 74AHC245PW,112 equivalent, key selection criteria include its CMOS-level input compatibility, 20-pin TSSOP package, -40 °C to +125 °C operating range, and verified 8-bit bidirectional bus isolation capability under dynamic load conditions.
Technical Context
The device implements a dual-rail 8-bit transceiver architecture with independent direction (DIR) and output enable (OE) control logic. OE is active-low and forces all outputs into high-impedance state regardless of DIR state, while DIR determines data flow direction between A- and B-buses. All inputs feature Schmitt-trigger action for noise immunity.
It supports voltage translation across supply domains: A-side and B-side I/O tolerate up to 5.5 V independent of VCC, enabling safe interfacing between 3.3 V logic and 5 V peripherals without external level shifters. Propagation delay symmetry (tpd A→B ≈ tpd B→A) ensures deterministic timing in full-duplex or time-multiplexed bus configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V - Enables direct operation from 3.3 V or 5 V rails without regulators. |
| Propagation Delay (tpd) | 3.5 ns (typ, VCC = 5 V, CL = 15 pF) - Supports >100 MHz bus toggle rates in short-trace applications. |
| Input Voltage Tolerance | Up to 5.5 V - Allows use as level translator between 3.3 V and 5 V systems without external components. |
| Operating Temperature | -40 °C to +125 °C - Qualified for industrial and extended-temperature embedded control environments. |
| Output Drive Strength | ±8 mA (VOH/VOL at VCC = 4.5 V) - Sufficient to drive 15 pF loads with <0.55 V VOL and >3.7 V VOH. |
| Power Dissipation | CPD = 12 pF - Predictable dynamic power: PD = 12 × VCC² × fi × N μW for switching inputs. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Robust handling during board assembly and field service. |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1), 20 leads, body width 4.4 mm, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW enables data flow A→B; HIGH enables B→A; referenced to VCC. |
| 2–9 (A0–A7) | Port A data I/O | Bidirectional pins on A-side; tolerate 5.5 V regardless of VCC. |
| 10 (GND) | Ground reference | 0 V return path for all internal circuitry and I/O current sinks. |
| 11–18 (B7–B0) | Port B data I/O | Bidirectional pins on B-side; identical voltage tolerance and drive specs as A-side. |
| 19 (OE) | Output enable (active LOW) | Drives all A/B outputs to high-impedance when HIGH; overrides DIR state. |
| 20 (VCC) | Supply voltage | Primary power rail (2.0–5.5 V); powers internal logic and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Withstand 5.5 V on A/B pins while VCC = 2.0–5.5 V - eliminates need for external clamping diodes in mixed-voltage buses. |
| Schmitt-trigger inputs | Hysteresis >0.3 V typical - rejects noise on slow-rising or noisy control lines (DIR/OE). |
| CMOS-level input thresholds | VIH = 3.85 V (min, VCC = 5.5 V); VIL = 1.65 V (max) - compatible with standard 3.3 V and 5 V logic families. |
| High noise immunity | Typical noise margin >1.2 V at VCC = 5 V - maintains signal integrity in electrically noisy industrial enclosures. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level A - prevents destructive latch-up during transient overvoltage events. |
Applications
| Microcontroller I/O Expansion | FPGA-to-ASIC Data Bridging |
|---|---|
Use Scenario: Expanding limited GPIO count of an ARM Cortex-M4 MCU to interface with multiple 8-bit peripheral devices (e.g., ADCs, DACs, displays). IC Role / Device Role: Bidirectional data buffer isolating MCU's 3.3 V I/O from 5 V sensor bus while translating logic levels. Use Value: Eliminates discrete level-shifters; reduces BOM count and PCB area; maintains timing predictability with sub-10 ns propagation delay. | Use Scenario: Interfacing a Xilinx Artix-7 FPGA (3.3 V I/O) to legacy ASIC-based motor controller (5 V TTL-compatible bus). IC Role / Device Role: Voltage-translating octal transceiver synchronizing data transfers between clock domains with direction control via FPGA GPIO. Use Value: Enables drop-in replacement of obsolete 74LS245; supports hot-swap-safe 3-state control during reconfiguration. |
| Industrial PLC Backplane Interface | Automotive Infotainment Subsystem Link |
Use Scenario: Isolating modular I/O cards on a 24 V-powered PLC backplane using 5 V logic rails with EMI-prone cabling. IC Role / Device Role: 3-state bus transceiver providing galvanically isolated data coupling between CPU module and field I/O modules. Use Value: Schmitt-trigger inputs reject conducted noise; -40 °C to +125 °C rating ensures reliability in uncooled control cabinets. | Use Scenario: Connecting a 3.3 V automotive-grade SoC to 5 V display timing controller in head-unit design. IC Role / Device Role: Level-shifting transceiver managing bi-directional pixel data and command bus with precise OE-controlled tristate timing. Use Value: Overvoltage tolerance prevents damage from load-dump transients; HBM >2000 V withstands ESD events during vehicle assembly. |
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,112 | TTL-compatible inputs (VIH = 2.0 V min); otherwise identical pinout, timing, and packaging. | Required where driving source is legacy 5 V TTL (e.g., 74LS series) with marginal 3.3 V high-level output. | Select when interfacing with older 5 V logic families lacking CMOS-level drive strength. |
| SN74LVC245APWR | Lower VCC range (1.65–3.6 V); LVTTL input thresholds; 3.6 V absolute max on I/O pins. | Restricted to 3.3 V-only systems; cannot translate to 5 V peripherals without external circuitry. | Choose only for pure 3.3 V designs requiring lower static current (<1 μA ICC) and smaller footprint. |
Compared with 74AHCT245PW,112, the 74AHC245PW,112 offers superior noise immunity and wider voltage translation but requires CMOS-level input sources; versus SN74LVC245APWR, it trades lower quiescent power for broader interoperability across 2.0–5.5 V domains.
Availability
74AHC245PW,112 is available at Aetrix Electronics and suitable for industrial automation interfaces, automotive infotainment subsystems, and FPGA-based prototyping platforms requiring stable component supply across extended temperature ranges.
Supply support for 74AHC245PW,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 essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
This device belongs to Nexperia's 74AHC advanced high-speed CMOS logic family, designed specifically for robust, low-power, mixed-voltage digital interfacing in space-constrained and thermally demanding applications.
FAQ
Can 74AHC245PW,112 be used to translate between 1.8 V and 3.3 V logic?
No. The 74AHC245PW,112 has a minimum VCC of 2.0 V and does not guarantee proper operation below that threshold. Its inputs are overvoltage tolerant up to 5.5 V, but internal logic requires ≥2.0 V supply to meet VIH/VIL specifications. For 1.8 V systems, consider the 74LVC245 or dedicated level translators.
What is the maximum capacitive load this device can drive reliably?
The datasheet specifies timing parameters up to 50 pF load capacitance (CL), with tpd ≤ 9.5 ns at VCC = 5 V. Driving >50 pF may increase propagation delay nonlinearly and degrade edge rate; for heavier loads, add series termination or buffer stages. Output current remains within ±8 mA limits up to CL = 50 pF with 1 kΩ RL.
Is the thermal pad on the TSSOP20 package electrically connected?
No. The exposed pad on the SOT360-1 (TSSOP20) package is not electrically connected to any internal node. Per Nexperia's datasheet, it may remain floating or be soldered to GND for thermal improvement, but no electrical connection is required or specified.
How does OE interact with DIR during state transitions?
OE is asynchronous and dominant: when OE is HIGH, all A/B outputs enter high-impedance state immediately, regardless of DIR value or data activity. DIR only affects data flow direction when OE is LOW. This allows clean bus arbitration-OE can be asserted before changing DIR to avoid bus contention.
74AHC245PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74AHC245PW,112 FAQ
1.How can I place an order for 74AHC245PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC245PW,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 74AHC245PW,112 reliable?
The price and inventory of 74AHC245PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC245PW,112 is usually 5 days.
3.What payment methods are accepted for 74AHC245PW,112?
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74AHC245PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC245PW,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 74AHC245PW,112?
For technical support, including 74AHC245PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC245PW,112 requirements.
6.How does Aetrix verify that 74AHC245PW,112 is sourced from the original manufacturer or authorized distributors?
All 74AHC245PW,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 74AHC245PW,112 meets industry standards.
7.What is the process for return or replacement of 74AHC245PW,112?
All 74AHC245PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC245PW,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 74AHC245PW,112 part is unused and in its original packaging.
Return procedure for 74AHC245PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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