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NXP Semiconductors 74ABT540N,602
- Part No.:
- 74ABT540N,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74ABT540N,602.pdf
- Description:
- IC BUFFER INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,339
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Product details
Overview
74ABT540N,602 from Philips Semiconductors is an octal inverting 3-state buffer IC designed for high-speed bus interface applications. It features dual output enables (OE0/OE1), ±64mA/–32mA drive capability, 3.1ns typical propagation delay at 5V, and operates across –40°C to +85°C. It is used in address/data bus driving where bidirectional isolation and live insertion are required.
For engineers reviewing the 74ABT540N,602 datasheet, 74ABT540N,602 pinout, 74ABT540N,602 application, or 74ABT540N,602 equivalent, key selection criteria include 3-state timing margins, output drive strength under 5V TTL-compatible conditions, thermal performance in DIP-20 packages, and compatibility with legacy ABT logic families.
Technical Context
The 74ABT540N,602 implements a BiCMOS architecture that delivers low static current (50µA in 3-state) while maintaining TTL-compatible input thresholds (VIL = 0.8V, VIH = 2.0V) and fast edge rates. Its dual enable inputs allow independent control of two groups of four outputs, supporting segmented bus management.
Propagation delay (tPLH/tPHL = 3.1ns typ.) and 3-state transition times (tPZH = 4.6ns max, tPHZ = 5.7ns max) are specified under CL = 50pF and VCC = 5.0V ±0.5V. Input and output capacitances (CIN = 3pF, COUT = 7pF) support high-density PCB routing without excessive signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal inverting buffer with dual 3-state enables (OE0, OE1) |
| Supply Voltage | 4.5V to 5.5V - ensures robust operation across industrial-grade 5V rails |
| Propagation Delay | 3.1ns typical (An to Yn, CL = 50pF, VCC = 5V) - supports >200MHz bus toggle rates |
| Output Drive | +64mA sink / –32mA source - drives heavy capacitive loads and multiple TTL inputs |
| Input Thresholds | VIL ≤ 0.8V, VIH ≥ 2.0V - guarantees noise margin with standard 5V TTL and CMOS interfaces |
| 3-State Leakage | IOZL/IOZH ≤ ±50µA at VCC = 5.5V - minimizes standby current in powered-down bus segments |
| Operating Temperature | –40°C to +85°C - qualified for industrial and telecom equipment environments |
Pinout & Package
74ABT540N,602 is supplied in a 20-pin plastic dual in-line package (DIP-20, SOT146-1), with 300-mil body width and through-hole mounting. Pin 10 is GND, pin 20 is VCC, and inputs/outputs are arranged on opposite sides to minimize trace crosstalk.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE0, OE1 | Dual active-low output enables - allows independent gating of two 4-bit output groups |
| 2–9 | A0–A7 | Inverting data inputs - each inverted and driven to corresponding Yn output when enabled |
| 11–18 | Y0–Y7 | Inverting 3-state outputs - high-impedance when either OE is high |
| 10 | GND | Ground reference - common return for all signals and supply current paths |
| 20 | VCC | +5V supply - powers internal BiCMOS circuitry and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Live insertion/extraction support | Prevents bus disturbance during hot-swap operations via controlled 3-state entry/exit timing |
| Power-up 3-state | Outputs remain high-impedance until VCC stabilizes above ~2.1V - avoids bus contention at power-on |
| Latch-up immunity | Exceeds 500mA per JEDEC JC40.2 - ensures reliability in noisy industrial environments |
| ESD protection | ≥2000V HBM, ≥200V MM - reduces handling damage risk during assembly and test |
| Efficient pinout layout | Inputs (pins 2–9) and outputs (pins 11–18) on opposite sides - simplifies orthogonal PCB routing |
Applications
| Microprocessor Bus Interface | Memory Address Buffering |
|---|---|
Use Scenario: Isolating and driving 8-bit address lines between a microcontroller and external SRAM or peripheral ICs. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level-shifted, high-drive address latching with OE-controlled bus release. Use Value: Enables clean address transitions and prevents bus contention during memory access arbitration using dual OE control. |
Use Scenario: Buffering decoded chip-select or bank-select signals in multi-memory systems. IC Role / Device Role / Timing Role: Octal inverter delivering synchronized, high-current select signals to multiple memory devices. Use Value: Ensures simultaneous, low-skew activation of up to eight memory chips with guaranteed VIH/VIL margins. |
| Legacy System Backplane Driver | Industrial I/O Expansion Module |
Use Scenario: Driving parallel backplane signals in retro-computing or industrial control chassis with long traces. IC Role / Device Role / Timing Role: High-drive inverting buffer compensating for trace capacitance and noise on 5V TTL backplanes. Use Value: Delivers 64mA sink current to maintain signal integrity over 10+ inch traces while supporting live board replacement. |
Use Scenario: Interfacing microcontroller GPIOs to high-current industrial sensors or actuators via opto-isolated modules. IC Role / Device Role / Timing Role: Level-translating and current-boosting buffer between low-power MCU pins and isolated driver stages. Use Value: Provides ESD-hardened, latch-up-resistant signal conditioning with precise 3-state control for safe I/O reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT540N | Same logic function, pinout, and AC specs; TI version with identical DIP-20 package and 3.1ns tPLH | No functional difference - drop-in replacement with same thermal and timing behavior | Select when sourcing from TI-authorized channels or requiring TI-specific quality documentation |
| 74F540PC | F-family variant: higher ICC (24mA vs 50µA in 3-state), faster tPLH (2.5ns typ), but no power-up 3-state or live-insertion rating | Suitable for speed-critical non-hot-swap designs; not recommended where bus contention during power sequencing must be avoided | Choose only if propagation delay <2.5ns is mandatory and 3-state leakage <100µA is not required |
Compared with SN74ABT540N and 74F540PC, the 74ABT540N,602 offers superior 3-state leakage control (50µA vs 24mA) and built-in power-up safety, making it preferred for industrial backplanes and modular systems requiring live insertion compliance.
Availability
74ABT540N,602 is available at Aetrix Electronics and suitable for industrial control backplanes, legacy microprocessor bus expansion, and memory subsystem buffering requiring stable component supply and long-term obsolescence management.
Supply support for 74ABT540N,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
Philips Semiconductors (now NXP Semiconductors) is a global semiconductor leader known for high-reliability logic, analog, and RF solutions targeting automotive, industrial, and communications markets.
The 74ABT540N,602 belongs to the ABT advanced biCMOS logic family, engineered for high-speed, low-noise bus interfacing in industrial and telecom infrastructure where 5V TTL compatibility and robust ESD/latch-up performance are critical.
FAQ
What is the maximum operating temperature range for the 74ABT540N,602?
The 74ABT540N,602 is rated for continuous operation from –40°C to +85°C. This range is validated per the manufacturer's recommended operating conditions and applies to all electrical specifications including propagation delay, output drive, and 3-state leakage. The device uses a plastic DIP package (SOT146-1) with thermal characteristics suitable for convection-cooled industrial enclosures.
Does the 74ABT540N,602 support live insertion into a powered bus?
Yes, the 74ABT540N,602 explicitly supports live insertion and extraction, as confirmed by its datasheet feature list and JEDEC-compliant latch-up immunity (>500mA). Its power-up 3-state behavior ensures outputs remain high-impedance until VCC stabilizes, preventing bus contention during hot-plug events in modular backplane systems.
What are the absolute maximum voltage ratings for VCC and input pins on the 74ABT540N,602?
The 74ABT540N,602 has an absolute maximum VCC rating of –0.5V to +7.0V and input voltage (VI) rating of –1.2V to +7.0V. These limits assume input/output current ratings are observed. Exceeding them may cause permanent damage; functional operation is only guaranteed within the recommended 4.5V–5.5V VCC range and 0V–VCC input range.
How does the dual output enable (OE0/OE1) functionality work in the 74ABT540N,602?
In the 74ABT540N,602, both OE0 (pin 1) and OE1 (pin 19) must be low to enable all eight outputs (Y0–Y7). If either enable is high, the corresponding group - OE0 controls Y0–Y3, OE1 controls Y4–Y7 - enters high-impedance state. This allows segmented bus control without external logic.
Is the 74ABT540N,602 pin-compatible with standard 74LS540 or 74HC540 devices?
No, the 74ABT540N,602 is not pin-compatible with 74LS540 or 74HC540. While all are octal inverting 3-state buffers, the 74ABT540N,602 uses a unique pinout: inputs on pins 2–9, outputs on pins 11–18, dual enables on pins 1/19, and GND/VCC on pins 10/20. LS/HC variants use different assignments (e.g., 74LS540 places GND at pin 10 but VCC at pin 20, yet assigns enables differently).
74ABT540N,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:
- Buffer, 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
74ABT540N,602 FAQ
1.How can I place an order for 74ABT540N,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT540N,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 74ABT540N,602 reliable?
The price and inventory of 74ABT540N,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT540N,602 is usually 5 days.
3.What payment methods are accepted for 74ABT540N,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT540N,602 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT540N,602?
74ABT540N,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT540N,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 74ABT540N,602?
For technical support, including 74ABT540N,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT540N,602 requirements.
6.How does Aetrix verify that 74ABT540N,602 is sourced from the original manufacturer or authorized distributors?
All 74ABT540N,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 74ABT540N,602 meets industry standards.
7.What is the process for return or replacement of 74ABT540N,602?
All 74ABT540N,602 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT540N,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 74ABT540N,602 part is unused and in its original packaging.
Return procedure for 74ABT540N,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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