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Nexperia USA Inc. 74ABT245PW,112
- Part No.:
- 74ABT245PW,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74ABT245PW,112.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,888
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Product details
Overview
74ABT245PW,112 from Nexperia is an octal bidirectional 3-state transceiver with independent direction (DIR) and output enable (OE) controls, operating at 4.5–5.5 V. It provides ±64 mA/–32 mA drive capability, IOFF partial power-down protection, and supports live insertion in bus interface applications such as industrial backplanes and legacy TTL-compatible data paths.
For engineers reviewing the 74ABT245PW,112 datasheet, 74ABT245PW,112 pinout, 74ABT245PW,112 application, or 74ABT245PW,112 equivalent, this device is selected for high-speed 8-bit bidirectional data transfer where robust ESD immunity (HBM >2000 V), latch-up resistance (>500 mA), and guaranteed operation from –40 °C to +85 °C are required.
Technical Context
The 74ABT245PW implements a BiCMOS logic architecture enabling TTL-level compatibility and fast propagation delays: tPLH/tPHL ≤ 4.6 ns at 5.0 V. Its dual-control interface uses DIR to select data flow direction (A→B or B→A) and OE (active LOW) to place all outputs in high-impedance state independently of direction.
IOFF circuitry actively disables outputs when VCC = 0 V, limiting backflow current to ±100 μA and enabling safe partial power-down in mixed-voltage systems. Input clamping voltage is specified at –1.2 V, supporting robust transient tolerance during hot-swap events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across standard 5 V rail tolerances and brown-out margins. |
| Drive Strength | +64 mA / –32 mA - Supports driving heavy capacitive loads and multiple TTL inputs without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns @ 5.0 V - Enables reliable timing in 100+ MHz bus clock domains with margin. |
| IOFF Leakage | ±100 μA @ VCC = 0 V - Prevents damaging back-current during system power sequencing or hot-swap. |
| ESD Rating | HBM >2000 V, CDM >1000 V - Meets industrial IEC 61000-4-2 level 2 requirements without external protection. |
| Operating Temp | –40 °C to +85 °C - Qualified for extended industrial environments including factory automation and telecom infrastructure. |
| Input Threshold | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Guarantees noise-immune switching with TTL and CMOS logic families. |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW enables A→B data flow; HIGH enables B→A - decouples bus arbitration from enable logic. |
| 2–9 (A0–A7) | Port A data I/O | Bidirectional pins tied to local subsystem (e.g., microcontroller data bus); driven only when OE = LOW and DIR matches direction. |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents; requires low-inductance PCB connection. |
| 11–18 (B0–B7) | Port B data I/O | Bidirectional pins connected to remote bus segment (e.g., peripheral module); function mirrors A-side under DIR control. |
| 19 (OE) | Output enable (active LOW) | Drives all A/B outputs to high-impedance when HIGH - enables multi-drop bus sharing without contention. |
| 20 (VCC) | Power supply | 5 V nominal supply; IOFF protection active even if VCC is ramped down independently of other rails. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional interface | Single-package replacement for eight discrete unidirectional buffers - reduces board area and routing complexity. |
| IOFF partial power-down | Outputs disabled with VCC = 0 V and VI/VO ≤ 4.5 V - eliminates backfeed risk during firmware updates or modular hot-swap. |
| Live insertion/extraction support | Guaranteed non-disruptive operation during powered board insertion - validated per JEDEC JESD78 Class II latch-up spec (>500 mA). |
| TTL-compatible input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures interoperability with legacy 5 V microcontrollers, FPGAs, and ASICs without level shifters. |
| BiCMOS output stage | Combines bipolar speed and CMOS low static power - achieves 4.6 ns max propagation delay while maintaining <250 μA ICC in 3-state mode. |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
|
Use Scenario: Isolating and extending parallel data buses between PLC CPU and I/O modules in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Bidirectional data repeater managing A→B (CPU→module) and B→A (module→CPU) transfers under DIR control, synchronized to 25 MHz bus clock. Use Value: Eliminates signal degradation over >15 cm traces while maintaining TTL logic levels and supporting hot-swap of I/O cards without system reset. |
Use Scenario: Interfacing modern microcontroller units to aging ISA or VMEbus peripherals requiring 5 V tolerant, high-drive transceivers. IC Role / Device Role / Timing Role: Level- and drive-capability translator between 3.3 V MCU GPIO and 5 V legacy bus, with DIR set statically for fixed-direction transfers. Use Value: Replaces obsolete 74LS245 with identical pinout and improved speed (4.6 ns vs. 15 ns), eliminating need for redesign or layout changes. |
| Test Equipment Data Capture | Programmable Logic Debug Interface |
|
Use Scenario: Capturing parallel status signals from DUTs in automated test fixtures where bus contention must be avoided during idle states. IC Role / Device Role / Timing Role: 3-state buffer isolating DUT data lines from measurement logic; OE controlled by test sequencer to gate capture windows. Use Value: Prevents loading of DUT outputs during non-capture periods via high-impedance isolation, preserving signal integrity and timing accuracy. |
Use Scenario: Providing debug visibility into internal FPGA or CPLD data paths using external logic analyzers with 5 V inputs. IC Role / Device Role / Timing Role: High-speed bidirectional probe interface between 3.3 V FPGA I/O banks and 5 V logic analyzer channels, with DIR toggled per capture phase. Use Value: Enables real-time observation of internal bus activity without degrading FPGA timing closure or requiring external level translators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT245DBR | SSOP20 package (SOT339-1); identical electrical specs but wider 5.3 mm body and 0.635 mm pitch. | Not suitable for space-constrained layouts requiring TSSOP20 footprint; same thermal profile and timing. | Select when existing PCB land pattern matches SSOP20 or when higher moisture sensitivity level (MSL-1) is required. |
| 74LVT245PW | Lower 2.7–3.6 V supply range; 3.3 V optimized; 32 mA drive; 3.5 ns typical propagation delay. | Designed for 3.3 V-only systems; lacks IOFF and HBM >2000 V rating; incompatible with 5 V buses. | Choose only for new 3.3 V designs prioritizing speed over 5 V interoperability and robustness. |
Compared with SN74ABT245DBR and 74LVT245PW, the 74ABT245PW,112 uniquely combines 5 V operation, IOFF safety, TSSOP20 compactness, and industrial temperature range - making it the sole option for retrofitting legacy 5 V systems with hot-swap capability in tight board spaces.
Availability
74ABT245PW,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy bus extensions, automated test equipment, and programmable logic debug systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 74ABT245PW,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-performance, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74ABT series delivers advanced BiCMOS bus interface ICs optimized for 5 V TTL-compatible systems requiring speed, drive strength, and robustness in harsh environments.
FAQ
What is the maximum clock frequency supported by the 74ABT245PW,112?
The 74ABT245PW,112 does not operate on a clock signal-it is asynchronous. Its usable data rate depends on propagation delay and system setup/hold timing. With tPLH/tPHL ≤ 4.6 ns and tPZL/tPHZ ≤ 6.3 ns, it reliably supports bidirectional bus transfers up to 100 MHz in well-designed PCB layouts with controlled impedance and minimal stub length.
Can the 74ABT245PW,112 be used with 3.3 V logic inputs?
Yes, but only when VCC = 5.0 V. Its VIH threshold is ≥2.0 V and VIL ≤0.8 V, so 3.3 V logic HIGH (≥2.4 V) meets input requirements. However, outputs swing to 5 V levels, so interfacing with 3.3 V-only receivers requires external level translation or clamping to avoid overvoltage damage.
Does the IOFF feature work when only one supply rail is powered down?
Yes. The IOFF circuit activates when VCC drops below ~0.8 V, disabling all outputs regardless of OE or DIR state. This prevents back-current flow from powered A- or B-side buses into the unpowered device, satisfying JEDEC JESD78 Class II latch-up immunity requirements during partial power-down sequences.
Is the 74ABT245PW,112 pin-compatible with older 74-series transceivers like the 74LS245?
Yes-pinout is identical across SO20, SSOP20, and TSSOP20 packages for all 74ABT245 variants. The 74ABT245PW,112 replaces 74LS245 directly: same DIR, OE, A/B port assignments, and GND/VCC locations. Electrical improvements include faster speed, higher drive, and IOFF, but no layout change is needed.
74ABT245PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ABT
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74ABT245PW,112 FAQ
1.How can I place an order for 74ABT245PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT245PW,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 74ABT245PW,112 reliable?
The price and inventory of 74ABT245PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT245PW,112 is usually 5 days.
3.What payment methods are accepted for 74ABT245PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT245PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT245PW,112?
74ABT245PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT245PW,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 74ABT245PW,112?
For technical support, including 74ABT245PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT245PW,112 requirements.
6.How does Aetrix verify that 74ABT245PW,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT245PW,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 74ABT245PW,112 meets industry standards.
7.What is the process for return or replacement of 74ABT245PW,112?
All 74ABT245PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT245PW,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 74ABT245PW,112 part is unused and in its original packaging.
Return procedure for 74ABT245PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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