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NXP Semiconductors 74ABT620D,602
- Part No.:
- 74ABT620D,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT620D,602.pdf
- Description:
- IC TXRX INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,343
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Product details
Overview
74ABT620D,602 from NXP Semiconductors (formerly Philips) is an octal bidirectional transceiver with dual active-high/active-low enable control and inverting 3-State outputs, operating at 4.5–5.5 V, delivering ±64 mA output drive, and achieving 3.1 ns typical propagation delay (An↔Bn, CL = 50 pF). It isolates A- and B-side buses in industrial backplane and memory expansion interfaces.
For engineers reviewing the 74ABT620D,602 datasheet, 74ABT620D,602 pinout, 74ABT620D,602 application, or 74ABT620D,602 equivalent, key selection criteria include dual-directional bus isolation timing, high-current 3-State drive capability, power-up 3-State behavior, live-insertion support, and SO20 package compatibility with legacy 74-series layouts.
Technical Context
The 74ABT620D,602 implements asynchronous bidirectional data flow between two 8-bit buses using separate OEAB (A→B, active-High) and OEBA (B→A, active-Low) controls, enabling independent direction gating without external logic. Its BiCMOS architecture delivers low ICCZ (50 µA) in 3-State while sustaining high-speed switching.
Propagation delays are symmetric for both directions (tPLH/tPHL ≤ 4.3 ns over –40°C to +85°C), and output enable/disable times are specified separately per enable pin (e.g., tPZH(OEAB→Bn) ≤ 6.4 ns max), supporting precise bus arbitration in multiplexed systems.
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 and margin against rail droop. |
| Propagation Delay | 3.1 ns typical (An↔Bn, CL = 50 pF) - Enables sub-300 MHz bus handshaking in high-speed digital backplanes. |
| Output Drive | +64 mA / –32 mA - Supports driving heavy capacitive loads (e.g., >100 pF traces or multiple inputs) without signal degradation. |
| I/O Capacitance | 7 pF (I/O disabled) - Minimizes bus loading during isolation, critical for maintaining signal integrity on shared data paths. |
| 3-State Leakage | ±100 µA max (–40°C to +85°C) - Guarantees robust high-impedance state under temperature stress, preventing bus contention. |
| Input Clamp Voltage | –1.2 V min - Protects inputs against negative transients up to –1.2 V, supporting hot-swap resilience. |
| ESD Rating | 2000 V HBM, 200 V MM - Meets industrial handling requirements without external protection circuitry. |
Pinout & Package
74ABT620D,602 is housed in a 20-pin plastic small outline package (SO20, SOT163-1), 7.5 mm body width, surface-mount compatible with IPC-7351B SOIC-20 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OEAB) | A-to-B output enable (active-High) | Asserting High enables data flow from A0–A7 to B0–B7; Low places B-side outputs in high-Z. |
| 2–9 (A0–A7) | Bidirectional I/O port (A side) | Inputs when OEAB = L & OEBA = H; outputs when OEAB = H & OEBA = L - inverting behavior applies. |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents; must be low-inductance connection for noise immunity. |
| 11–18 (B0–B7) | Bidirectional I/O port (B side) | Inputs when OEBA = H & OEAB = L; outputs when OEBA = L & OEAB = H - inverting behavior applies. |
| 19 (OEBA) | B-to-A output enable (active-Low) | Asserting Low enables data flow from B0–B7 to A0–A7; High places A-side outputs in high-Z. |
| 20 (VCC) | Positive supply | 5 V nominal supply; decoupling capacitor (100 nF) required within 10 mm for stable 3-State transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Power-up 3-State | Outputs remain in high-impedance state during VCC ramp-up, eliminating bus conflicts at power-on reset. |
| Live insertion/extraction support | Validated latch-up immunity (>500 mA) and ESD tolerance enable safe hot-plug operation in modular backplanes. |
| Dual independent enable logic | OEAB (active-High) and OEBA (active-Low) allow direct interface with complementary control signals without inverters. |
| Inverting transceiver function | Data passed from A to B or B to A undergoes logical inversion - simplifies polarity alignment in differential or inverted-bus systems. |
| BiCMOS process | Combines CMOS input stage (low leakage) with bipolar output stage (high drive), achieving 3.1 ns speed at 50 µA quiescent current. |
Applications
| Industrial Backplane Interface | Memory Expansion Subsystem |
|---|---|
|
Use Scenario: Isolating CPU local bus from peripheral expansion slots in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Bidirectional level-shifting and bus isolation transceiver managing data flow between processor and add-on I/O modules. Use Value: Dual enable pins allow independent arbitration of read/write cycles; ±64 mA drive sustains signal integrity across 15 cm backplane traces. |
Use Scenario: Extending 8-bit data bus between microcontroller and external SRAM/ROM in embedded instrumentation. IC Role / Device Role / Timing Role: Inverting octal transceiver enabling time-multiplexed address/data sharing on shared bus lines. Use Value: 3.1 ns propagation delay supports >100 MHz memory access timing; power-up 3-State prevents boot-time bus contention. |
| Legacy System Bus Bridge | Test Equipment Data Path |
|
Use Scenario: Interfacing modern FPGA-based controller with legacy 74-series TTL peripherals in lab automation hardware. IC Role / Device Role / Timing Role: Protocol-transparent bus transceiver translating between contemporary logic families and vintage discrete logic subsystems. Use Value: SO20 package matches footprint of obsolete 74LS620; inverting function aligns with legacy bus polarity conventions. |
Use Scenario: Routing stimulus/response data between pattern generator and DUT in automated test equipment (ATE) racks. IC Role / Device Role / Timing Role: High-speed, low-leakage bidirectional buffer enabling reconfigurable signal routing without cross-talk. Use Value: 7 pF I/O capacitance minimizes path skew; live-insertion rating permits field-replaceable module design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT620DBR | TI version in SSOP-20 (SOT339-1); identical AC/DC specs but 5.3 mm body width vs. 7.5 mm SO20. | Requires PCB pad revision due to narrower SSOP footprint; same timing and drive strength. | Select when board space is constrained and SSOP rework is acceptable. |
| 74LVX620M | Lower-voltage variant (2.7–3.6 V supply); 3.5 ns typical delay; ±24 mA drive; non-inverting logic. | Not pin-compatible; requires level translation for 5 V systems; unsuitable for hot-swap due to lower ESD rating (1500 V HBM). | Choose only for 3.3 V domains where lower power and non-inverting behavior are prioritized over 5 V compatibility. |
Compared with SN74ABT620DBR and 74LVX620M, the 74ABT620D,602 provides guaranteed 5 V operation, SO20 drop-in replacement for legacy designs, and superior hot-swap robustness - making it optimal for industrial upgrades requiring zero layout change and proven field reliability.
Availability
74ABT620D,602 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, and legacy system bus bridges requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 74ABT620D,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, headquartered in Eindhoven, Netherlands, develops high-performance logic, interface, and automotive ICs with emphasis on industrial reliability and long-lifecycle support.
The 74ABT620D,602 belongs to NXP's ABT-series advanced bi-directional transceivers, designed specifically for robust 5 V bus interfacing in harsh industrial environments with demanding timing and ESD requirements.
FAQ
What is the logic polarity of data transfer in the 74ABT620D,602?
The 74ABT620D,602 performs inverting transceiver operation: data presented at A0–A7 appears inverted at B0–B7 when OEAB is active, and data at B0–B7 appears inverted at A0–A7 when OEBA is active. This behavior is confirmed in the Function Table and Logic Symbol of the official Philips product specification dated 1993 Jun 21.
Does the 74ABT620D,602 support hot-plug operation?
Yes, the 74ABT620D,620 supports live insertion/extraction per its datasheet, enabled by latch-up protection exceeding 500 mA (JESD17) and ESD ratings of 2000 V HBM / 200 V MM. These specifications ensure safe operation during powered module replacement in backplane systems without system shutdown.
What is the maximum operating temperature range for the 74ABT620D,602?
The 74ABT620D,602 is rated for operation from –40°C to +85°C, as specified in the Ordering Information and Recommended Operating Conditions sections of the Philips product specification. This full industrial temperature range is guaranteed for all DC and AC parameters.
Is the 74ABT620D,602 pin-compatible with older 74-series transceivers?
Yes, the 74ABT620D,602 in SO20 (SOT163-1) package maintains identical pinout and electrical interface compatibility with legacy 74LS620 and 74F620 devices, including matching enable polarity assignments and I/O positioning - enabling direct drop-in replacement in existing designs.
What is the quiescent supply current of the 74ABT620D,602 in 3-State mode?
The 74ABT620D,602 draws 50 µA typical total supply current (ICCZ) when all outputs are in 3-State, measured at VCC = 5.5 V and Tamb = 25°C. Over the full temperature range (–40°C to +85°C), ICCZ remains ≤ 250 µA, ensuring minimal standby power in isolated bus segments.
74ABT620D,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 20-SO
74ABT620D,602 FAQ
1.How can I place an order for 74ABT620D,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT620D,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 74ABT620D,602 reliable?
The price and inventory of 74ABT620D,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT620D,602 is usually 5 days.
3.What payment methods are accepted for 74ABT620D,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT620D,602 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT620D,602?
74ABT620D,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT620D,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 74ABT620D,602?
For technical support, including 74ABT620D,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT620D,602 requirements.
6.How does Aetrix verify that 74ABT620D,602 is sourced from the original manufacturer or authorized distributors?
All 74ABT620D,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 74ABT620D,602 meets industry standards.
7.What is the process for return or replacement of 74ABT620D,602?
All 74ABT620D,602 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT620D,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 74ABT620D,602 part is unused and in its original packaging.
Return procedure for 74ABT620D,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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