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NXP Semiconductors 74ABT640N,602
- Part No.:
- 74ABT640N,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74ABT640N,602.pdf
- Description:
- IC TXRX INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,314
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Product details
Overview
74ABT640N,602 from NXP Semiconductors (formerly Philips) is an octal inverting transceiver with direction control and 3-State outputs, designed for bidirectional bus interface between TTL/CMOS systems. It features ±64mA/–32mA output drive, 3.1ns typical propagation delay (An↔Bn), 4pF input capacitance, and operates across –40°C to +85°C at 4.5V–5.5V supply. It enables high-speed data routing in backplane and board-level interconnect applications.
For engineers reviewing the 74ABT640N,602 datasheet, 74ABT640N,602 pinout, 74ABT640N,602 application, or 74ABT640N,602 equivalent, key selection criteria include its inverting transceiver logic, DIR/OE dual-control architecture, 20-pin DIP package, high-current drive capability, and compatibility with 5V TTL bus environments.
Technical Context
The 74ABT640N,602 implements a true bidirectional octal transceiver with separate Direction (DIR) and Output Enable (OE) inputs, where DIR determines signal flow (A→B or B→A) and OE disables both sides into high-impedance. Its BiCMOS process delivers low static current (50µA in 3-State) while sustaining fast switching and robust latch-up immunity (>500mA).
All eight A-side and B-side I/Os are inverting and share common 3-State control. The device supports live insertion/extraction and power-up 3-State behavior, ensuring bus integrity during hot-swap events without external pull-ups or sequencing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - Ensures compatibility with standard 5V TTL logic rails and margin against supply droop. |
| Propagation Delay | 3.1ns typical (An↔Bn, CL=50pF) - Enables >200MHz bus operation in point-to-point or lightly loaded configurations. |
| Output Drive | +64mA sink / –32mA source - Supports driving multiple TTL loads or terminated transmission lines without buffering. |
| Input Capacitance | 4pF (DIR, OE) - Minimizes capacitive loading on control signals, preserving timing margins in dense layouts. |
| 3-State Leakage | ±100µA max (Tamb = –40°C to +85°C) - Guarantees reliable high-impedance isolation under worst-case thermal conditions. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and communications equipment deployment. |
| ESD Protection | 2000V HBM, 200V MM - Meets MIL-STD-883 requirements for handling robustness in manufacturing and field service. |
Pinout & Package
74ABT640N,602 is housed in a 20-pin plastic dual in-line package (DIP), 300 mil width, with through-hole mounting and industry-standard pin spacing (0.1" pitch). Pin 10 is GND, pin 20 is VCC; no thermal pad or exposed die attach.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: Low = B→A data flow; High = A→B data flow - defines real-time bus arbitration path. |
| 2–9 | A0–A7 | Inverting bidirectional I/Os (A side) - connect to local subsystem bus; logic inverted on both transmit and receive. |
| 11–18 | B0–B7 | Inverting bidirectional I/Os (B side) - interface to remote or peripheral bus; inversion matches A-side for net zero polarity shift. |
| 19 | OE | Active-low 3-State enable for B→A direction only - allows independent disabling of one data path while retaining A-side functionality. |
| 10 | GND | Signal and power reference ground - must be low-inductance connection to minimize ground bounce during high-current switching. |
| 20 | VCC | +5V supply rail - requires local 0.1µF ceramic decoupling adjacent to pin to suppress high-frequency supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional bus interface | Enables full-duplex data exchange between two 8-bit buses using single device, reducing component count vs. discrete buffers. |
| Power-up 3-State | Outputs remain in high-impedance until VCC stabilizes above ~2.1V - prevents bus contention during power ramp-up. |
| Live insertion/extraction support | Guaranteed safe hot-plug operation without damaging connected logic or inducing glitches on shared bus lines. |
| Latch-up protection | Exceeds 500mA per JEDEC Std 17 - ensures survivability under transient overcurrent or ESD-induced substrate injection. |
| High-current drive asymmetry | +64mA sink / –32mA source optimized for driving TTL inputs and terminating stubs, balancing speed and fanout. |
Applications
| Industrial Backplane Interconnect | Legacy System Bus Extension |
|---|---|
|
Use Scenario: Connecting CPU module to I/O expansion cards across a 200mm backplane with 5V TTL signaling. IC Role / Device Role / Timing Role: Bidirectional data transceiver managing address/data multiplexing between master and slave slots with direction arbitration via DIR. Use Value: 3.1ns propagation delay and ±64mA drive maintain signal integrity across long traces; 3-State isolation prevents bus conflicts during card hot-swap. |
Use Scenario: Extending ISA or VMEbus segments between legacy controllers and new peripheral modules operating at 5V. IC Role / Device Role / Timing Role: Level-shifting and bus-driving transceiver translating between different board-level voltage domains while preserving logic polarity. Use Value: Inverting I/O architecture matches legacy bus timing conventions; 4pF input capacitance minimizes skew on critical control lines like DIR and OE. |
| Modular Test Equipment Interface | Programmable Logic Carrier Board |
|
Use Scenario: Routing configurable digital stimulus/response paths between FPGA-based test pattern generator and DUT socket. IC Role / Device Role / Timing Role: Reconfigurable data path element controlled by FPGA GPIOs for dynamic bus topology changes. Use Value: DIR/OE dual control enables run-time reassignment of data flow direction without reset; power-up 3-State prevents initialization glitches. |
Use Scenario: Interfacing CPLD configuration memory and status registers to host microcontroller on carrier board. IC Role / Device Role / Timing Role: Isolated bidirectional data bridge allowing microcontroller read/write access to CPLD registers without bus contention. Use Value: 2000V HBM ESD rating protects sensitive CPLD I/Os during manual board handling; 50µA 3-State ICCZ reduces standby power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT640N | Identical logic function, pinout, and AC/DC specs; manufactured by Texas Instruments with same ABT family process. | Same 5V industrial bus interface use cases; TI's version has identical thermal derating and qualification profile. | Select when sourcing from TI-authorized channels or requiring TI-specific traceability documentation. |
| 74F640PC | Fast TTL variant: higher ICC (30mA active), slower tPLH (5.5ns typ), no power-up 3-State or live-insertion rating. | Suitable only for fixed-configuration, non-hot-swap systems with relaxed timing and lower reliability requirements. | Choose only if legacy F-series inventory exists and ABT-level performance/robustness is not required. |
Compared with SN74ABT640N and 74F640PC, the 74ABT640N,602 offers superior ESD/latch-up immunity and guaranteed power-up 3-State behavior - critical for modular industrial systems where field-replaceable units demand plug-and-play reliability without firmware intervention.
Availability
74ABT640N,602 is available at Aetrix Electronics and suitable for industrial backplane interconnect, legacy system bus extension, and modular test equipment requiring stable component supply and long-term obsolescence management.
Supply support for 74ABT640N,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, formerly Philips Semiconductors, is a global leader in high-performance logic and interface ICs, with deep heritage in industrial and automotive-grade semiconductor solutions.
The 74ABT640N,602 belongs to the ABT (Advanced BiCMOS Technology) logic family, engineered specifically for high-speed, low-noise 5V bus interfacing in mission-critical industrial and communications infrastructure.
FAQ
What is the logic polarity of the 74ABT640N,602 data paths?
The 74ABT640N,602 implements inverting transceiver logic on both A and B sides: data presented at A0 appears inverted at B0 when DIR = H and OE = L, and vice versa. This inversion is inherent to the device architecture and applies identically in both directions - no external inversion is needed to achieve net non-inverting bus transfer.
Does the 74ABT640N,602 support hot-swap without external protection circuitry?
Yes, the 74ABT640N,602 is explicitly rated for live insertion/extraction per its datasheet. Its BiCMOS design, combined with built-in latch-up protection (>500mA) and ESD hardening (2000V HBM), allows safe connection/disconnection while powered - provided VCC and GND make contact before signal pins during mating.
How does the OE pin function relative to DIR in the 74ABT640N,602?
In the 74ABT640N,602, OE is active-low and controls only the B→A direction path. When OE = H, B-side outputs are forced high-impedance regardless of DIR state; when OE = L, DIR then determines whether data flows B→A (DIR = L) or A→B (DIR = H). This enables asymmetric bus control.
What is the maximum recommended load capacitance for maintaining 74ABT640N,602 timing specs?
The 74ABT640N,602 AC specifications - including 3.1ns typical propagation delay - are characterized at CL = 50pF. Exceeding this value increases tPLH/tPHL nonlinearly; for designs with >50pF net load (e.g., long traces or multiple TTL inputs), timing must be verified empirically or derated using the device's output impedance model.
Is the 74ABT640N,602 pin-compatible with other 74-series transceivers like the 74LS245?
No, the 74ABT640N,602 is not pin-compatible with 74LS245. While both are octal transceivers, the 74ABT640N,602 uses DIR/OE dual control with inverting I/Os and places DIR on pin 1 and OE on pin 19; 74LS245 uses single-direction (DIR) and output-enable (OE) on pins 1 and 19 but with non-inverting logic and different pin assignments for data lines.
74ABT640N,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
74ABT640N,602 FAQ
1.How can I place an order for 74ABT640N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT640N,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 74ABT640N,602 reliable?
The price and inventory of 74ABT640N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT640N,602 is usually 5 days.
3.What payment methods are accepted for 74ABT640N,602?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT640N,602?
74ABT640N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT640N,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 74ABT640N,602?
For technical support, including 74ABT640N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT640N,602 requirements.
6.How does Aetrix verify that 74ABT640N,602 is sourced from the original manufacturer or authorized distributors?
All 74ABT640N,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 74ABT640N,602 meets industry standards.
7.What is the process for return or replacement of 74ABT640N,602?
All 74ABT640N,602 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT640N,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 74ABT640N,602 part is unused and in its original packaging.
Return procedure for 74ABT640N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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