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NXP Semiconductors 74ABT620N,602
- Part No.:
- 74ABT620N,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74ABT620N,602.pdf
- Description:
- IC TXRX INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,280
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Product details
Overview
74ABT620N,602 from NXP Semiconductors (formerly Philips) is an octal bidirectional transceiver with dual active-high/active-low enables and inverting 3-State outputs, operating at 4.5–5.5 V, delivering ±64 mA output drive, 3.1 ns typical propagation delay (An↔Bn), and designed for asynchronous bus isolation in industrial control backplanes and memory-mapped I/O interfaces.
For engineers reviewing the 74ABT620N,602 datasheet, 74ABT620N,602 pinout, 74ABT620N,602 application, or 74ABT620N,602 equivalent, key selection criteria include dual-directional enable logic (OEAB high-active, OEBA low-active), inverting data path behavior, 20-pin DIP package compatibility, and BiCMOS-level drive strength with live-insertion support.
Technical Context
The 74ABT620N,602 implements a fully inverting bidirectional data path: A0–A7 and B0–B7 each serve as inputs or outputs depending on OEAB and OEBA states, with signal inversion occurring in both directions. Its dual-enable architecture permits independent control of A→B (OEAB) and B→A (OEBA) data flow without bus contention.
It features BiCMOS process technology enabling simultaneous high-speed operation (sub-5 ns propagation), high-current sourcing (+64 mA) and sinking (–32 mA), and robust latch-up immunity (>500 mA per JEDEC 17). Power-up 3-State and live insertion capability are enabled by internal biasing that holds outputs in high-impedance until VCC stabilizes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS systems while tolerating rail droop. |
| Propagation Delay | 3.1 ns typical (An↔Bn, CL = 50 pF) - Enables reliable operation in sub-100 MHz synchronous bus environments. |
| Output Drive | +64 mA / –32 mA - Supports direct driving of multiple TTL loads or termination-resistor networks without buffers. |
| Input Capacitance | 4 pF (OEAB/OEBA) - Minimizes loading on upstream control logic and preserves timing margins. |
| I/O Capacitance | 7 pF (outputs disabled) - Reduces crosstalk and dynamic power in high-density bus layouts. |
| Quiescent Supply Current | 50 µA (outputs disabled) - Enables low-static-power bus isolation during system sleep modes. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded systems including programmable logic controllers. |
Pinout & Package
74ABT620N,602 is supplied in a 20-pin plastic dual in-line package (DIP), 300 mil width, with through-hole mounting and industry-standard pin spacing (0.1 inch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OEAB) | A-to-B output enable input | Active-High control: asserts A→B data path when high; disables outputs to high-Z when low. |
| 2–9 (A0–A7) | Bidirectional I/O port (A side) | Inverting data path: A0 drives inverted signal to B0, and receives inverted signal from B0 when enabled. |
| 10 (GND) | Ground reference | 0 V return for all internal logic and output stages; must be low-inductance connection for noise immunity. |
| 11 (VCC) | Positive supply | Primary 4.5–5.5 V power rail; decoupling capacitor required within 1 cm for stable high-speed switching. |
| 12 (OEBA) | B-to-A output enable input | Active-Low control: asserts B→A data path when low; disables outputs to high-Z when high. |
| 13–20 (B0–B7) | Bidirectional I/O port (B side) | Inverting data path: B0 drives inverted signal to A0, and receives inverted signal from A0 when enabled. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional interface | Simultaneous A↔B communication over eight parallel lines with direction controlled per-enable, eliminating need for separate send/receive ICs. |
| Dual independent enables | OEAB (A→B, active-high) and OEBA (B→A, active-low) allow asymmetric timing control and prevent bus contention during state transitions. |
| Power-up 3-State | Outputs remain in high-impedance until VCC reaches valid level, preventing glitches during power ramp-up in hot-swap or modular systems. |
| Live insertion/extraction support | Internal circuitry prevents latch-up or damage when inserted into powered backplanes, enabling field-replaceable module designs. |
| High-current BiCMOS outputs | ±64 mA drive supports fan-out to 10+ standard TTL loads or direct connection to 50 Ω transmission lines without external drivers. |
Applications
| Industrial Backplane Interface | Memory-Mapped I/O Expansion |
|---|---|
Use Scenario: Isolating CPU local bus from peripheral expansion slots in programmable logic controllers and CNC motion controllers. IC Role / Device Role / Timing Role: Bidirectional level-shifting and bus buffering between microcontroller address/data bus and add-on I/O modules. Use Value: Dual enable logic allows precise timing control of read/write handshaking; inverting path matches legacy peripheral polarity requirements. | Use Scenario: Connecting microcontroller GPIO banks to external memory-mapped peripherals such as ADCs, DACs, or FPGA configuration registers. IC Role / Device Role / Timing Role: Direction-controlled data conduit enabling shared access to peripheral registers without bus arbitration logic. Use Value: 3.1 ns propagation delay ensures setup/hold timing compliance at 20+ MHz bus clock rates; ±64 mA drive sustains signal integrity across 10 cm PCB traces. |
| Hot-Swappable Module Interconnect | Legacy System Bus Extension |
Use Scenario: Enabling safe insertion/removal of I/O cards in powered industrial rack systems using standardized backplane connectors. IC Role / Device Role / Timing Role: Bus isolator with live-insertion protection and power-up 3-State behavior to prevent backfeeding or contention. Use Value: Latch-up immunity >500 mA and ESD protection >2 kV permit repeated hot-plug cycles without degradation or failure. | Use Scenario: Extending aging 8-bit microprocessor buses (e.g., Z80, 8085) to support additional peripheral cards in test equipment or lab instrumentation. IC Role / Device Role / Timing Role: Inverting transceiver matching original system logic family polarity and timing constraints. Use Value: Pin-compatible replacement for obsolete 74LS620/74F620 with improved speed, drive, and power efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVT620PW,118 | Lower supply range (2.7–3.6 V), non-inverting data path, TSSOP20 package | Designed for 3.3 V systems; lacks live insertion support and power-up 3-State | Select only for new 3.3 V designs requiring non-inverting logic and smaller footprint. |
| SN74ABT620N | Identical electrical specs and pinout; Texas Instruments second-source version in same 20-pin DIP | No functional difference; qualified for identical industrial temperature range and bus isolation use cases | Drop-in replacement where TI-sourced parts are preferred for supply chain diversification. |
Compared with 74ABT620N,602, the 74LVT620PW,118 requires voltage translation and logic inversion in-system, while SN74ABT620N offers identical performance with no design changes-making it ideal for dual-sourcing without layout or firmware impact.
Availability
74ABT620N,602 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory-mapped I/O expansion, and hot-swappable module interconnects requiring stable component supply across extended product lifecycles.
Supply support for 74ABT620N,602 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering integrated circuits division.
The 74ABT series was developed by Philips to deliver high-speed, high-drive BiCMOS logic for industrial bus interfaces, bridging the performance gap between TTL and advanced CMOS while maintaining pin compatibility with legacy families.
FAQ
What is the logic polarity of the 74ABT620N,602 data path?
The 74ABT620N,602 implements an inverting bidirectional data path: signals passed from A0–A7 to B0–B7, or vice versa, are inverted. This matches legacy system requirements where complementary logic levels are needed between bus segments. The inversion occurs regardless of direction or enable state, and is intrinsic to the device's internal gate structure as confirmed in the function table and logic symbol.
Does the 74ABT620N,602 support live insertion into a powered backplane?
Yes, the 74ABT620N,602 supports live insertion and extraction, as explicitly stated in its features list and verified by its latch-up immunity (>500 mA per JEDEC Std 17) and ESD protection (>2000 V per MIL-STD-883). Its power-up 3-State behavior ensures outputs remain high-impedance until VCC stabilizes, preventing bus contention or damage during hot-swap events in modular industrial systems.
What are the voltage thresholds for OEAB and OEBA on the 74ABT620N,602?
For the 74ABT620N,602, VIH is 2.0 V minimum and VIL is 0.8 V maximum across the full operating temperature range (–40°C to +85°C) at VCC = 4.5–5.5 V. OEAB is active-High (asserted ≥2.0 V), while OEBA is active-Low (asserted ≤0.8 V). These thresholds ensure reliable interfacing with standard 5 V TTL and CMOS control signals without level translation.
Can the 74ABT620N,602 be used in 3.3 V systems?
No, the 74ABT620N,602 is not rated for 3.3 V operation. Its recommended supply range is strictly 4.5–5.5 V, and absolute maximum VCC is +7.0 V. Operating below 4.5 V risks undefined logic states, increased propagation delay, and failure to meet output drive specifications. For 3.3 V systems, consider the 74LVT620 or 74ALVCH16620 instead.
What is the thermal limit for continuous operation of the 74ABT620N,602?
The 74ABT620N,602 has a maximum junction temperature of 150°C, with recommended operating free-air temperature ranging from –40°C to +85°C. Its BiCMOS construction minimizes self-heating, but sustained 64 mA output current into low-impedance loads requires adequate PCB copper area and airflow. Thermal derating is required above +85°C ambient, and operation beyond 150°C junction temperature risks permanent parametric shift or failure.
74ABT620N,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, 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:
- Through Hole
- Supplier Device Package:
- 20-DIP
74ABT620N,602 FAQ
1.How can I place an order for 74ABT620N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT620N,602 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 74ABT620N,602 reliable?
The price and inventory of 74ABT620N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT620N,602 is usually 5 days.
3.What payment methods are accepted for 74ABT620N,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT620N,602 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT620N,602?
74ABT620N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT620N,602 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 74ABT620N,602?
For technical support, including 74ABT620N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT620N,602 requirements.
6.How does Aetrix verify that 74ABT620N,602 is sourced from the original manufacturer or authorized distributors?
All 74ABT620N,602 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 74ABT620N,602 meets industry standards.
7.What is the process for return or replacement of 74ABT620N,602?
All 74ABT620N,602 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT620N,602, 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 74ABT620N,602 part is unused and in its original packaging.
Return procedure for 74ABT620N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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