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NXP Semiconductors 74ABT640DB,118
- Part No.:
- 74ABT640DB,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT640DB,118.pdf
- Description:
- IC TXRX INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,292
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Product details
Overview
74ABT640DB,118 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 DIR and OE inputs, ±64mA/–32mA output drive, 3.1ns typical propagation delay (An↔Bn), and operates from –40°C to +85°C in a 20-pin SSOP package.
For engineers reviewing the 74ABT640DB,118 datasheet, 74ABT640DB,118 pinout, 74ABT640DB,118 application, or 74ABT640DB,118 equivalent, key selection criteria include its inverting transceiver logic, high-current 3-State capability, live-insertion support, and compatibility with legacy ABT bus architectures requiring direction-controlled data flow between A- and B-side I/Os.
Technical Context
The 74ABT640DB,118 implements a dual-rail bidirectional interface where DIR selects data flow direction (A→B or B→A), while OE (active-low) enables/disables all B-side outputs to A-side. Its BiCMOS process delivers low static current (50µA in 3-State) and high-speed switching with guaranteed timing across industrial temperature range.
All eight A/B I/O pairs are inverting: input at An produces inverted output at Bn, and vice versa. The device supports power-up 3-State behavior and latch-up protection exceeding 500mA per JEDEC Std 17, making it suitable for hot-swap-capable backplane and modular system designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 5.5V - Ensures robust operation under noisy 5V rail conditions without level-shifting. |
| Propagation Delay | 3.1ns typical (An↔Bn, CL=50pF) - Enables sub-300MHz bus timing in synchronous systems. |
| Output Drive | +64mA sink / –32mA source - Drives heavy capacitive loads and multiple TTL inputs directly. |
| Input Capacitance | 4pF (DIR, OE) - Minimizes loading on control lines in fan-out-critical timing paths. |
| I/O Capacitance | 7pF (outputs disabled) - Reduces signal integrity degradation during 3-State transitions. |
| Operating Temperature | –40°C to +85°C - Validated for industrial and telecom equipment environments. |
Pinout & Package
74ABT640DB,118 is housed in a 20-pin plastic SSOP Type II package (SOT339-1), 5.3 mm body width, with standard 0.65 mm lead pitch and gull-wing leads for surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | Low = A→B data flow; High = B→A - determines inversion path direction for all 8 channels. |
| 2–9 (A0–A7) | Data I/O (A side) | Inverting bidirectional ports - driven by B-side when DIR active, drive B-side when DIR inactive. |
| 11–18 (B0–B7) | Data I/O (B side) | Inverting bidirectional ports - driven by A-side when DIR inactive, drive A-side when DIR active. |
| 10 (GND) | Ground reference | 0V return path for all signals and supply current - must be low-impedance for noise immunity. |
| 20 (VCC) | Positive supply | +5V DC power rail - requires local 0.1µF decoupling adjacent to pin for stable high-speed operation. |
| 19 (OE) | Output enable (active-low) | Low = enable B-side outputs to A; High = tri-state all B-side outputs - enables cascading and bus arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| Octal inverting transceiver logic | Each A/B pair provides true inversion in both directions - eliminates need for external inverters in differential or complemented bus schemes. |
| Live insertion/extraction support | Guaranteed 3-State behavior during power sequencing - allows safe hot-plug of daughter cards or modules without bus contention. |
| Power-up 3-State | Outputs remain high-impedance until VCC stabilizes above 2.1V - prevents metastability and glitching during power ramp. |
| Latch-up protection | Exceeds 500mA per JEDEC Std 17 - ensures survivability in transient overcurrent events common in shared-bus systems. |
| ESD robustness | 2000V HBM / 200V MM - withstands handling and board-level ESD without functional degradation. |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
Use Scenario: Interfacing a microcontroller bus to a multi-slot industrial backplane carrying sensor and actuator data. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing direction-controlled data flow between CPU and peripheral slots. Use Value: Inverting logic matches legacy ISA-style bus protocols; ±64mA drive sustains signal integrity across 15 cm trace lengths. | Use Scenario: Extending a 5V TTL bus between two PCBs in a rack-mounted test instrument with modular I/O cards. IC Role / Device Role / Timing Role: Hot-swappable bus repeater enabling dynamic card insertion without system reset. Use Value: Live insertion support and power-up 3-State prevent bus lockup during card replacement; 3.1ns delay preserves timing margins. |
| Telecom Line Card Data Mux | Automated Test Equipment (ATE) Signal Routing |
Use Scenario: Multiplexing diagnostic data streams from multiple line cards onto a shared maintenance bus in a central office switch. IC Role / Device Role / Timing Role: Direction-gated transceiver isolating card-specific data paths under software control via DIR/OE. Use Value: DIR pin enables real-time reconfiguration of data flow direction without FPGA logic overhead; 7pF I/O capacitance minimizes crosstalk. | Use Scenario: Routing stimulus and response signals between DUT interface and pattern generator in high-channel-count ATE. IC Role / Device Role / Timing Role: Precision-controlled bidirectional buffer synchronizing test vectors with DUT responses. Use Value: Guaranteed 4.9ns max tPLH/tPHL ensures sub-200MHz test clock alignment; 4pF control pin capacitance reduces setup/hold timing burden. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT640DBR | TI version in same SSOP-20 package; identical AC/DC specs but different ESD rating (2000V HBM only, no MM spec stated). | Valid for industrial use but lacks documented machine-model ESD validation - may require additional board-level protection in automated handling environments. | Select when sourcing from TI distribution channels; verify MM ESD compliance if used in high-automation SMT lines. |
| 74LVX640M | Lower-voltage 3.3V-only variant (2.7–3.6V); 5.5ns max propagation delay; reduced drive (±24mA); not 5V-tolerant. | Requires level-shifting for 5V bus integration; unsuitable for direct replacement in legacy 5V systems. | Choose only for new 3.3V designs where power savings outweigh speed and drive trade-offs. |
Compared with SN74ABT640DBR and 74LVX640M, the 74ABT640DB,118 uniquely combines full 5V operation, 3.1ns speed, ±64mA drive, and dual ESD ratings - making it the only drop-in solution for legacy ABT-based industrial backplanes requiring guaranteed live-insertion and latch-up immunity.
Availability
74ABT640DB,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, telecom line card data multiplexing, automated test equipment signal routing, and legacy system bus extension requiring stable component supply and long-term lifecycle support.
Supply support for 74ABT640DB,118 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering IC development.
The 74ABT640DB,118 belongs to NXP's legacy 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 predictability are paramount.
FAQ
What is the function of the DIR pin on the 74ABT640DB,118?
The DIR (Direction) pin on the 74ABT640DB,118 controls bidirectional data flow: when DIR = Low, data passes from A-side inputs (A0–A7) to inverted B-side outputs (B0–B7); when DIR = High, data flows from B-side inputs to inverted A-side outputs. This single-pin control eliminates external logic for direction management in bus architectures, and the 74ABT640DB,118 guarantees correct inversion in both directions per its function table.
Does the 74ABT640DB,118 support hot-swap or live insertion?
Yes, the 74ABT640DB,118 explicitly supports live insertion and extraction per its datasheet features. Its power-up 3-State behavior ensures outputs remain high-impedance until VCC exceeds 2.1V, and its latch-up protection (>500mA) and ESD robustness (2000V HBM / 200V MM) allow safe insertion into powered-backplane systems without bus contention or damage - a critical capability confirmed for the 74ABT640DB,118 in industrial modular hardware.
What is the maximum output current specification for the 74ABT640DB,118?
The 74ABT640DB,118 specifies a maximum output sink current of +64mA and source current of –32mA under recommended operating conditions (VCC = 4.5V, Tamb = –40°C to +85°C). This asymmetric drive strength is optimized for driving TTL loads and multiple fan-outs, and the 74ABT640DB,118 maintains these ratings across its full industrial temperature range without derating.
Is the 74ABT640DB,118 pin-compatible with other packages in the 74ABT640 family?
Yes, the 74ABT640DB,118 shares identical pinout and functionality with all 20-pin variants of the 74ABT640 family - including DIP (74ABT640N), SO (74ABT640D), and TSSOP (74ABT640PW) - as confirmed by Philips' ordering information and pin configuration diagrams. The 74ABT640DB,118 uses SOT339-1 (SSOP Type II), and its pin mapping matches the standard 20-pin layout across all packages.
What logic family does the 74ABT640DB,118 belong to, and what voltage levels is it compatible with?
The 74ABT640DB,118 belongs to the Advanced BiCMOS Technology (ABT) logic family and is fully compatible with 5V TTL voltage levels: VIH ≥ 2.0V, VIL ≤ 0.8V, VOH ≥ 2.4V (at –32mA), VOL ≤ 0.55V (at +64mA). It operates from 4.5V to 5.5V and is not 3.3V-compatible; the 74ABT640DB,118 requires a stable 5V supply and interfaces directly with standard TTL, LVTTL, and older CMOS logic without level shifters.
74ABT640DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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,118 FAQ
1.How can I place an order for 74ABT640DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT640DB,118 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,118 reliable?
The price and inventory of 74ABT640DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT640DB,118 is usually 5 days.
3.What payment methods are accepted for 74ABT640DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT640DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT640DB,118?
74ABT640DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT640DB,118 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,118?
For technical support, including 74ABT640DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT640DB,118 requirements.
6.How does Aetrix verify that 74ABT640DB,118 is sourced from the original manufacturer or authorized distributors?
All 74ABT640DB,118 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,118 meets industry standards.
7.What is the process for return or replacement of 74ABT640DB,118?
All 74ABT640DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT640DB,118, 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,118 part is unused and in its original packaging.
Return procedure for 74ABT640DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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