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NXP Semiconductors 74ABT640D,602
- Part No.:
- 74ABT640D,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT640D,602.pdf
- Description:
- IC TXRX INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,701
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Product details
Overview
74ABT640D,602 from NXP Semiconductors (formerly Philips) is an octal inverting transceiver with direction control and 3-State outputs, designed for bidirectional bus interfacing in 5V TTL-compatible systems. It features ±64mA/–32mA output drive, 3.1ns typical propagation delay (An↔Bn), power-up 3-State behavior, and operates across –40°C to +85°C.
For engineers reviewing the 74ABT640D,602 datasheet, 74ABT640D,602 pinout, 74ABT640D,602 application, or 74ABT640D,602 equivalent, key selection criteria include direction-pin-controlled bidirectional data flow, high-current drive capability, live-insertion support, and SO20 package compatibility with legacy 74-series bus architectures.
Technical Context
The 74ABT640D,602 implements a BiCMOS architecture delivering low static/dynamic power with high-speed performance. Its dual 3-State control-via active-low OE (B→A enable) and DIR (data direction)-enables deterministic bus arbitration without external timing logic.
All eight A-side and B-side I/Os are inverting in both directions; signal inversion occurs regardless of DIR state. The device supports hot-plug operation due to latch-up protection (>500mA per JEDEC Std 17) and ESD robustness (>2000V HBM, >200V MM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - Ensures compatibility with standard 5V TTL and CMOS logic rails. |
| Propagation Delay | 3.1ns typical (An↔Bn, CL=50pF) - Enables reliable operation in high-speed bus cycles up to ~300MHz. |
| Output Drive | +64mA sink / –32mA source - Supports driving heavy capacitive loads or multiple TTL inputs without buffering. |
| Input Capacitance | 4pF (DIR, OE) - Minimizes loading on control lines and preserves signal integrity in dense routing. |
| I/O Capacitance | 7pF (outputs disabled) - Reduces switching noise and crosstalk on shared bus segments. |
| Quiescent Supply Current | 50µA (outputs disabled) - Enables low-power standby in battery-backed or energy-sensitive systems. |
| Operating Temperature | –40°C to +85°C - Validated for industrial-grade embedded and telecom infrastructure applications. |
Pinout & Package
74ABT640D,602 is housed in a 20-lead plastic small outline package (SO20, SOT163-1), 7.5mm body width, with standard 1.27mm pitch and gull-wing leads suitable for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: Low = B→A transfer, High = A→B transfer (inverting path). |
| 2–9 | A0–A7 | Bidirectional I/O (A side): Invert data when transmitting or receiving via DIR-selected path. |
| 11–18 | B0–B7 | Bidirectional I/O (B side): Mirror A-side behavior with inversion; electrically isolated when OE inactive. |
| 19 | OE | Active-low output enable: Enables B→A data flow only; A→B path remains enabled by DIR alone. |
| 10 | GND | Ground reference (0V) - Shared return for all I/O and supply currents. |
| 20 | VCC | Positive supply (4.5–5.5V) - Powers internal BiCMOS circuitry and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional bus interface | Simultaneous 8-bit data transfer in either direction with single-direction control pin (DIR), eliminating need for dual-control logic. |
| Power-up 3-State | Outputs remain in high-impedance state during VCC ramp-up, preventing bus contention at power-on. |
| Live insertion/extraction support | Latch-up immunity (>500mA) and ESD hardening allow safe board replacement in powered-backplane systems. |
| Inverting 3-State outputs | Signal inversion applied consistently in both A→B and B→A paths, simplifying logic-level alignment in mixed-signal buses. |
| High-current drive capability | +64mA sink strength enables direct driving of 10+ standard TTL loads or termination networks without external buffers. |
Applications
| Industrial Backplane Bus Interface | Legacy System Memory Expansion |
|---|---|
Use Scenario: Interfacing a microcontroller's address/data bus to a modular I/O backplane with hot-swappable slots. IC Role / Device Role / Timing Role: Bidirectional level-shifting and bus isolation transceiver managing data flow between CPU and peripheral modules. Use Value: DIR pin enables dynamic direction switching per transaction; OE allows selective module activation without bus contention. |
Use Scenario: Adding SRAM or EPROM to an 8-bit embedded controller with limited address space and no dedicated memory controller. IC Role / Device Role / Timing Role: Address/data multiplexing and bus buffering transceiver supporting read/write cycles with precise timing margins. Use Value: 3.1ns propagation delay ensures setup/hold compliance at 20MHz bus clocks; inverting logic aligns with legacy memory timing diagrams. |
| Test Equipment Signal Routing | Automated Test Fixture Control |
Use Scenario: Reconfigurable signal path switching in automated test equipment connecting DUT pins to measurement instruments. IC Role / Device Role / Timing Role: Programmable bidirectional signal gate controlling analog/digital stimulus/response routing. Use Value: Live-insertion tolerance permits field replacement of test modules without powering down the main chassis. |
Use Scenario: Controlling parallel I/O lines in semiconductor burn-in testers where multiple devices share a common test bus. IC Role / Device Role / Timing Role: Isolating and enabling/disabling device-under-test communication channels under microcontroller supervision. Use Value: 50µA quiescent current minimizes standby power in large-scale fixtures with hundreds of transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT640DBR | TI version in SSOP-20 (SOT339-1); identical AC/DC specs but slightly higher ICCZ (75µA max) | Same functional behavior; SSOP footprint requires PCB redesign vs SO20 | Select if SSOP packaging preferred for density; verify thermal derating at 85°C ambient |
| 74LVT640PW,118 | NXP LVT variant: 3.3V supply only (2.7–3.6V), lower drive (±32mA), non-inverting logic | Not pin-compatible; requires level translation and logic inversion in host design | Choose only for 3.3V-only systems needing lower power; not a drop-in replacement |
Compared with SN74ABT640DBR and 74LVT640PW,118, the 74ABT640D,602 uniquely delivers 5V-compatible inverting transceiver functionality in SO20 with proven industrial temperature margin and live-insertion robustness-making it optimal for legacy 5V bus upgrades where footprint and logic polarity must be preserved.
Availability
74ABT640D,602 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system memory expansion, and automated test fixture control requiring stable component supply and long-term obsolescence management.
Supply support for 74ABT640D,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 reliability, longevity, and industrial-grade qualification.
The 74ABT640D,602 belongs to NXP's ABT-series advanced BiCMOS logic family, engineered for high-speed, high-drive 5V bus interfacing in industrial, telecom, and instrumentation systems where signal integrity and robustness are critical.
FAQ
What is the logic polarity of data transfer in 74ABT640D,602?
The 74ABT640D,602 performs inverting data transfer in both directions: A→B and B→A paths invert the input signal regardless of DIR state. For example, a logic HIGH on A0 appears as LOW on B0 when DIR = HIGH and OE = LOW. This behavior is fixed and cannot be disabled.
Does 74ABT640D,602 support hot-swap operation in powered systems?
Yes, the 74ABT640D,602 supports live insertion/extraction due to built-in latch-up protection exceeding 500mA per JEDEC Std 17 and ESD ratings of >2000V HBM. These features prevent damage during board replacement in active backplanes, provided VCC sequencing and current limiting comply with recommended operating conditions.
What is the function of the OE pin on 74ABT640D,602?
The OE (Output Enable) pin on 74ABT640D,602 is active-low and controls only the B→A data path. When OE = LOW, B-side signals propagate to A-side (inverted). When OE = HIGH, B→A outputs enter high-impedance state, while A→B transfer remains fully operational under DIR control.
Can 74ABT640D,602 operate at 3.3V supply voltage?
No, the 74ABT640D,602 is specified only for 4.5V to 5.5V operation. Its BiCMOS architecture and DC/AC characteristics-including VOH/VOL levels and output drive-are validated exclusively within this range. Operation below 4.5V may result in undefined logic states or degraded timing margins.
Is the 74ABT640D,602 pin-compatible with older 74-series transceivers like 74LS640?
No, the 74ABT640D,602 is not pin-compatible with 74LS640. While both are octal inverting transceivers, the 74ABT640D,602 uses a different pinout: DIR is on Pin 1 (vs Pin 11 on 74LS640), and OE is on Pin 19 (vs Pin 1 on 74LS640). Direct substitution requires PCB layout revision.
74ABT640D,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
74ABT640D,602 FAQ
1.How can I place an order for 74ABT640D,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT640D,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 74ABT640D,602 reliable?
The price and inventory of 74ABT640D,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT640D,602 is usually 5 days.
3.What payment methods are accepted for 74ABT640D,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT640D,602 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT640D,602?
74ABT640D,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT640D,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 74ABT640D,602?
For technical support, including 74ABT640D,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT640D,602 requirements.
6.How does Aetrix verify that 74ABT640D,602 is sourced from the original manufacturer or authorized distributors?
All 74ABT640D,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 74ABT640D,602 meets industry standards.
7.What is the process for return or replacement of 74ABT640D,602?
All 74ABT640D,602 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT640D,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 74ABT640D,602 part is unused and in its original packaging.
Return procedure for 74ABT640D,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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