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NXP Semiconductors 74ABT640DB,112
- Part No.:
- 74ABT640DB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT640DB,112.pdf
- Description:
- IC TXRX INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,215
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Product details
Overview
74ABT640DB,112 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 from –40°C to +85°C in a 20-pin SSOP package.
For engineers reviewing the 74ABT640DB,112 datasheet, 74ABT640DB,112 pinout, 74ABT640DB,112 application, or 74ABT640DB,112 equivalent, key selection criteria include direction-controlled bidirectional data flow, high-current drive capability, low input capacitance (4pF), and compatibility with legacy ABT logic families in industrial backplane and memory interface designs.
Technical Context
The 74ABT640DB,112 implements dual-directional data transfer using a single DIR pin to select A→B (DIR = L) or B→A (DIR = H), with active-low OE enabling/disabling all outputs simultaneously. Its BiCMOS architecture delivers high-speed switching while maintaining TTL-level voltage thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V) and robust latch-up immunity (>500mA per JEDEC 17).
All eight A-side and B-side I/Os are inverting in both directions, and the device supports live insertion/extraction due to controlled power-up 3-State behavior and ESD protection exceeding 2000V (MIL-STD-883) and 200V (Machine Model). Output disable timing (tPHZ/tPLZ) is specified at ≤6.8ns/5.5ns over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - Ensures stable operation across standard 5V supply tolerances in industrial systems. |
| tPLH / tPHL | 3.1ns typical (CL = 50pF) - Enables sub-4ns bidirectional propagation critical for high-speed bus arbitration. |
| IOL / IOH | 64mA sink / –32mA source - Drives heavy capacitive loads or multiple TTL inputs without external buffers. |
| CIN / CI/O | 4pF input / 7pF I/O disabled - Minimizes signal loading on address/data buses and reduces crosstalk. |
| ICCZ | 50µA max (VCC = 5.5V, outputs disabled) - Supports low-quiescent-power 3-State hold during system standby. |
| Operating Temp | –40°C to +85°C - Qualified for extended-temperature industrial and telecom equipment deployment. |
Pinout & Package
74ABT640DB,112 is housed in a 20-pin plastic SSOP (Shrink Small Outline Package), Type II, body width 5.3 mm (SOT339-1), with gull-wing leads and 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | Low = A→B data flow; High = B→A; determines inversion path for all eight channels. |
| 2–9 (A0–A7) | A-side bidirectional I/O | Inverting data terminals; function as inputs when DIR/OE disable opposite side, outputs when enabled. |
| 11–18 (B0–B7) | B-side bidirectional I/O | Inverting data terminals; mirror A-side behavior with direction reversed per DIR state. |
| 10 (GND) | Ground reference | 0V return for all internal logic and output drivers; must be low-impedance for noise immunity. |
| 20 (VCC) | Positive supply | 5V nominal power rail; decoupling required within 10mm of pin for AC performance stability. |
| 19 (OE) | Output enable (active-low) | When high, forces all A/B outputs into high-impedance; enables cascading via shared bus lines. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional bus interface | Single-package replacement for two 74-series octal buffers; eliminates routing complexity in memory/data bus interconnects. |
| Power-up 3-State | Outputs remain high-impedance until VCC stabilizes above ~2.1V - prevents bus contention during power sequencing. |
| Live insertion/extraction support | Validated ESD and latch-up specs allow hot-swap in modular backplanes without system reset or damage risk. |
| +64mA/–32mA output drive | Drives up to 16 standard TTL loads or long traces (>10 cm FR4) without signal degradation or timing skew. |
Applications
| Industrial Backplane Interface | Legacy Memory Bus Expansion |
|---|---|
Use Scenario: Interfacing microcontroller local bus to multi-slot industrial backplane with mixed-vendor peripheral cards. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver managing address/data flow between CPU and slot-resident peripherals under DIR control. Use Value: Eliminates need for discrete direction logic and separate buffers; 3.1ns delay ensures cycle-accurate timing across 16-bit parallel backplane. | Use Scenario: Expanding 8086/80286-based embedded systems with additional SRAM or EPROM banks using shared address/data bus. IC Role / Device Role / Timing Role: Inverting octal transceiver isolating memory bank select logic from main bus while preserving signal integrity. Use Value: 64mA drive sustains signal edge rate across >20 cm trace lengths; power-up 3-State prevents boot-time bus conflicts. |
| Telecom Line Card Data Mux | Test Equipment Signal Routing |
Use Scenario: Dynamic reconfiguration of TDM channel data paths on line cards supporting multiple protocol variants (E1/T1/J1). IC Role / Device Role / Timing Role: Direction-controlled bus switch routing time-multiplexed PCM samples between DSP and physical layer ICs. Use Value: Sub-5ns propagation enables real-time sample forwarding without pipeline stalls; live-insertion allows field-replaceable module upgrades. | Use Scenario: Automated test fixture routing stimulus/response signals between DUT and measurement instruments across multiple pin groups. IC Role / Device Role / Timing Role: Programmable bidirectional bus gate enabling flexible signal path definition via DIR/OE control from test controller. Use Value: 4pF input capacitance minimizes test signal distortion; 50µA ICCZ supports low-power idle states during test sequence pauses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT245DBR | Non-inverting logic; identical 20-pin SSOP package; same VCC range and drive strength. | Requires inverted control logic or external inverters for DIR signal if system expects inverting behavior. | Select when non-inverting data path simplifies control firmware or matches existing buffer family. |
| 74LVTH16245MTD | 16-bit (dual-octal), 3.3V-only supply (2.7–3.6V); different pinout and voltage domain. | Not suitable for 5V legacy systems; requires level translation for mixed-voltage backplanes. | Select only in new 3.3V designs where higher density and lower power outweigh voltage incompatibility. |
Compared with SN74ABT245DBR and 74LVTH16245MTD, the 74ABT640DB,112 provides guaranteed inverting behavior essential for legacy ABT bus architectures, operates natively at 5V with proven industrial temperature reliability, and offers minimal pin-count solution for dedicated octal bidirectional paths without over-provisioning.
Availability
74ABT640DB,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy memory bus expansions, telecom line card data muxing, and automated test equipment signal routing requiring stable component supply and long-term obsolescence management.
Supply support for 74ABT640DB,112 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 delivering high-performance analog, logic, and interface solutions for automotive, industrial, and communication markets, with roots in Philips' pioneering IC development.
The 74ABT640DB,112 belongs to the ABT logic family, engineered for high-speed, high-drive 5V TTL-compatible bus interfacing in mission-critical industrial and telecom infrastructure where reliability and timing precision are non-negotiable.
FAQ
What is the logic polarity of data transfer in 74ABT640DB,112?
The 74ABT640DB,112 performs inverting data transfer in both directions: when DIR = L (A→B), A0–A7 inputs appear as inverted outputs on B0–B7; when DIR = H (B→A), B0–B7 inputs appear as inverted outputs on A0–A7. This behavior is intrinsic to the device's architecture and confirmed in the function table and logic symbol of the official Philips specification.
Does 74ABT640DB,112 support hot-plug operation?
Yes, the 74ABT640DB,112 supports live insertion/extraction as explicitly stated in its features list. This capability is enabled by its latch-up protection (>500mA per JEDEC Std 17), ESD robustness (>2000V HBM), and controlled power-up 3-State behavior - all validated in the original Philips product specification.
What is the maximum output current rating for 74ABT640DB,112?
The 74ABT640DB,112 is rated for 64mA sink current (IOL) and –32mA source current (IOH) per output, measured under recommended operating conditions (VCC = 4.5V, VI = VIL/VIL). These values are specified in the DC Electrical Characteristics table and define the absolute steady-state drive capability before voltage compliance limits are violated.
Is 74ABT640DB,112 pin-compatible with other 74ABT640 variants?
Yes, the 74ABT640DB,112 shares identical pin configuration and function mapping with all 74ABT640 variants (e.g., 74ABT640N, 74ABT640D, 74ABT640PW), as confirmed by the unified PIN CONFIGURATION and PIN DESCRIPTION sections covering all packages in the Philips datasheet.
What package type is used for 74ABT640DB,112?
The 74ABT640DB,112 uses a 20-pin plastic SSOP (Shrink Small Outline Package), Type II, with 5.3 mm body width and 0.65 mm lead pitch (SOT339-1). This is explicitly assigned to part number suffix "DB" in the Ordering Information table of the Philips specification.
74ABT640DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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-SSOP
74ABT640DB,112 FAQ
1.How can I place an order for 74ABT640DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT640DB,112 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 74ABT640DB,112 reliable?
The price and inventory of 74ABT640DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT640DB,112 is usually 5 days.
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74ABT640DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT640DB,112 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 74ABT640DB,112?
For technical support, including 74ABT640DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT640DB,112 requirements.
6.How does Aetrix verify that 74ABT640DB,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT640DB,112 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 74ABT640DB,112 meets industry standards.
7.What is the process for return or replacement of 74ABT640DB,112?
All 74ABT640DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT640DB,112, 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 74ABT640DB,112 part is unused and in its original packaging.
Return procedure for 74ABT640DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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