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Nexperia USA Inc. 74ABT245D,623
- Part No.:
- 74ABT245D,623
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT245D,623.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,320
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Product details
Overview
74ABT245D,623 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 strength, IOFF partial power-down protection, and propagation delays as low as 1.0 ns (tPLH/tPHL), used in high-speed bus interface applications between microcontrollers and peripheral logic.
For engineers reviewing the 74ABT245D,623 datasheet, 74ABT245D,623 pinout, 74ABT245D,623 application, or 74ABT245D,623 equivalent, this device supports live insertion, TTL-level compatibility, latch-up immunity (>500 mA), and operates across –40 °C to +85 °C - critical for industrial control backplanes and legacy system upgrades requiring robust bus buffering.
Technical Context
The 74ABT245D implements BiCMOS logic architecture to achieve high-speed switching (typ. 2.2–2.9 ns propagation delay) while maintaining TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and rail-to-rail output swing. Its dual-control logic (DIR + OE) enables deterministic data flow direction and precise bus isolation.
IOFF circuitry actively disables outputs during VCC = 0 V, limiting backflow current to ±100 μA, satisfying IEC 60134 absolute maximum rating compliance. Static leakage remains under ±5 μA per pin at full VCC (5.5 V), supporting stable operation in mixed-voltage subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - ensures compatibility with 5 V TTL and CMOS systems without level-shifting. |
| Drive Strength | +64 mA / –32 mA - supports driving heavy capacitive loads (e.g., >50 pF buses) and fan-out to multiple inputs. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns - enables reliable operation in 100+ MHz bus environments with tight timing margins. |
| IOFF Leakage | ±100 μA at VCC = 0 V - prevents damaging current flow during hot-swap or partial power-down sequences. |
| Operating Temp | –40 °C to +85 °C - qualified for industrial automation, test equipment, and telecom line cards. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - reduces field failure risk in manual handling and board assembly. |
| Latch-up Immunity | >500 mA per JESD78 Class II Level A - guarantees survivability under transient overvoltage events. |
Pinout & Package
74ABT245D,623 uses SO20 (SOT163-1) package: plastic small outline, 20-pin, 7.5 mm body width, 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | Determines data flow: DIR = HIGH → A→B; DIR = LOW → B→A. |
| 2–9 (A0–A7) | Port A I/O | Bidirectional data pins on side A; high-impedance when OE = HIGH. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers. |
| 11–18 (B0–B7) | Port B I/O | Bidirectional data pins on side B; synchronized with DIR and OE states. |
| 19 (OE) | Output enable (active LOW) | OE = LOW enables transceiver; OE = HIGH forces all A/B pins into 3-state. |
| 20 (VCC) | Power supply | Primary 4.5–5.5 V supply; powers internal BiCMOS circuitry and output stages. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional interface | Simultaneous 8-bit data transfer in either direction controlled by single DIR pin - simplifies bus arbitration logic. |
| IOFF partial power-down | Outputs disable safely at VCC = 0 V, eliminating backfeed risk during hot-plug or power sequencing - essential for modular systems. |
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max - directly interfaces legacy 5 V microcontrollers and FPGAs without external biasing. |
| Live insertion/extraction support | Guaranteed 3-state behavior during power transitions - enables field-replaceable modules in telecom and industrial racks. |
| BiCMOS process technology | Combines bipolar speed and CMOS low static power - achieves sub-5 ns delays with <250 μA ICC (disabled). |
Applications
| Industrial PLC Backplane | Legacy System Bus Extension |
|---|---|
Use Scenario: Isolating CPU address/data bus from expansion I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing 8-bit parallel communication between main controller and isolated I/O cards. Use Value: IOFF protection prevents backfeed during module hot-swap; ±64 mA drive sustains signal integrity across 20 cm PCB traces. | Use Scenario: Extending ISA or VMEbus signals between aging embedded boards and modern FPGA-based peripherals. IC Role / Device Role / Timing Role: Level-translation and bus buffering for 5 V TTL-compatible data paths with strict setup/hold timing. Use Value: 4.6 ns max propagation delay meets ISA timing budgets; 2.0 V VIH ensures reliable sampling of marginal legacy signals. |
| Test Equipment Signal Routing | Automated Manufacturing Fixture |
Use Scenario: Dynamically reconfiguring signal paths in automated test equipment (ATE) for multi-DUT parallel testing. IC Role / Device Role / Timing Role: Direction-controlled signal gate enabling shared resource access (e.g., common ADC/DAC bus) across DUTs. Use Value: DIR + OE dual control allows atomic bus ownership handoff; 1000 V CDM ESD rating withstands probe contact discharge. | Use Scenario: Interfacing microcontroller GPIOs to high-current solenoid/relay drivers on production-line fixtures. IC Role / Device Role / Timing Role: Output buffer and isolation device protecting MCU pins from inductive kickback and noise coupling. Use Value: –32 mA sink capability drives optocoupler LEDs directly; latch-up immunity >500 mA prevents latch-induced failure during EMI events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT245N | DIP-20 package; no IOFF; higher ICC (500 μA typical disabled) | Suitable only for fixed-mount, non-hot-swap applications due to missing power-down protection | Select only if through-hole mounting and absence of partial power-down are acceptable |
| 74LVC245APW | 3.3 V only (1.65–3.6 V); lower drive (±24 mA); no IOFF | Requires level-shifting for 5 V systems; unsuitable for direct TTL interfacing or hot-swap | Prefer only in pure 3.3 V domains where lower power and smaller TSSOP20 footprint are prioritized |
Compared with SN74ABT245N and 74LVC245APW, the 74ABT245D,623 uniquely combines 5 V operation, IOFF safety, and SO20 surface-mount compatibility - making it the sole choice for industrial hot-swap bus extension where reliability and legacy voltage alignment are mandatory.
Availability
74ABT245D,623 is available at Aetrix Electronics and suitable for industrial PLC backplanes, legacy bus extensions, and automated test equipment requiring stable component supply and long-term lifecycle assurance.
Supply support for 74ABT245D,623 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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with global R&D and manufacturing infrastructure.
The 74ABT series targets high-speed, robust bus interface applications in industrial, computing, and communications systems - designed specifically for 5 V TTL interoperability, hot-swap resilience, and power-aware system architectures.
FAQ
What is the maximum capacitive load the 74ABT245D,623 can drive while maintaining specified timing?
The device is characterized up to 50 pF load capacitance (per Table 9 test conditions), with propagation delays guaranteed ≤4.6 ns at 5 V and 25 °C. Driving >50 pF increases tPLH/tPHL nonlinearly and may violate setup/hold margins - use series termination or reduce trace length for heavier loads.
Does the 74ABT245D,623 support mixed-voltage operation (e.g., 3.3 V inputs with 5 V VCC)?
No - inputs are TTL-compatible (VIH ≥ 2.0 V), but the device requires VCC = 4.5–5.5 V and does not support 3.3 V logic levels on inputs or outputs. For mixed-voltage systems, use dedicated level translators like NXSL1T45 or 74LVC1T45 upstream.
How does the IOFF feature behave during power sequencing where VCC ramps after other rails?
IOFF activates automatically when VCC drops below ~1.5 V, disabling outputs and limiting reverse current to ±100 μA regardless of input/output voltage (≤4.5 V). This protects downstream devices even if A/B buses remain energized during brown-out or staggered power-up.
Can OE and DIR be tied together for unidirectional operation?
Yes - connecting OE and DIR simplifies control to two wires (e.g., OE/DIR = LOW enables A→B; OE/DIR = HIGH disables outputs), but eliminates independent direction control. Ensure driver logic accounts for simultaneous assertion and verify timing margins using tPZH/tPLZ specs.
74ABT245D,623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 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-SO
74ABT245D,623 FAQ
1.How can I place an order for 74ABT245D,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT245D,623 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 74ABT245D,623 reliable?
The price and inventory of 74ABT245D,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT245D,623 is usually 5 days.
3.What payment methods are accepted for 74ABT245D,623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT245D,623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT245D,623?
74ABT245D,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT245D,623 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 74ABT245D,623?
For technical support, including 74ABT245D,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT245D,623 requirements.
6.How does Aetrix verify that 74ABT245D,623 is sourced from the original manufacturer or authorized distributors?
All 74ABT245D,623 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 74ABT245D,623 meets industry standards.
7.What is the process for return or replacement of 74ABT245D,623?
All 74ABT245D,623 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT245D,623, 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 74ABT245D,623 part is unused and in its original packaging.
Return procedure for 74ABT245D,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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