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NXP Semiconductors 74ABT640PW,118
- Part No.:
- 74ABT640PW,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74ABT640PW,118.pdf
- Description:
- IC TXRX INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,544
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Product details
Overview
74ABT640PW,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 ±64mA/–32mA output drive, 3.1ns typical propagation delay (An↔Bn), power-up 3-State behavior, and operates from –40°C to +85°C. It is used in backplane data routing and memory expansion subsystems.
For engineers reviewing the 74ABT640PW,118 datasheet, 74ABT640PW,118 pinout, 74ABT640PW,118 application, or 74ABT640PW,118 equivalent, key selection criteria include direction-pin-controlled bidirectional flow, inverting logic on both A and B ports, high-current 3-State drive capability, and TSSOP-20 packaging for space-constrained board layouts.
Technical Context
The 74ABT640PW,118 implements a dual-rail bidirectional bus interface using a single DIR input to select data flow direction (A→B or B→A) and an active-low OE input to enable/disable all B-side outputs. Its BiCMOS architecture delivers low static current (50µA in 3-State) while sustaining high-speed switching (≤4.9ns max tPLH/tPHL over temperature).
All eight A-side and eight B-side I/Os are inverting: an asserted logic level at A0 produces its complement at B0 when DIR = L and OE = L, and vice versa. The device supports live insertion/extraction and includes latch-up protection (>500mA) and ESD robustness (>2kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - Ensures compatibility with standard 5V TTL and CMOS logic rails without level-shifting. |
| tPLH / tPHL | 3.1ns typical (CL = 50pF) - Enables reliable operation in high-speed bus cycles up to ~200MHz system timing margin. |
| 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 capacitance - Minimizes signal distortion and timing skew on densely routed PCB traces. |
| ICCZ | 50µA max (VCC = 5.5V, outputs disabled) - Reduces standby power in battery-backed or low-power hold modes. |
| Operating Temp | –40°C to +85°C - Qualified for industrial-grade embedded control and telecom infrastructure environments. |
Pinout & Package
74ABT640PW,118 is housed in a 20-lead TSSOP (Thin Shrink Small Outline Package) with 0.65mm lead pitch and 4.4mm body width (SOT360-1), optimized for automated SMT assembly and thermal dissipation in compact designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | Low = A→B data flow; High = B→A; determines inversion path for all 8 channels. |
| 2–9 (A0–A7) | Bidirectional I/O (A side) | Inverting data terminals; function as inputs when DIR selects B→A and OE disables B outputs. |
| 11–18 (B0–B7) | Bidirectional I/O (B side) | Inverting data terminals; driven only when OE = L; high-impedance when OE = H. |
| 10 (GND) | Ground reference | 0V return path for all internal logic and output drivers; must be low-inductance connection. |
| 20 (VCC) | Positive supply | 5V power rail; requires local 100nF ceramic decoupling adjacent to pin 20. |
| 19 (OE) | Output enable (active-Low) | When High, places all B-side outputs in 3-State; enables cascading via daisy-chained OE lines. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional bus interface | Single-package solution for 8-bit parallel data exchange between two independent bus domains with shared direction control. |
| Power-up 3-State | Outputs remain in high-impedance state during VCC ramp-up, preventing bus contention at power-on reset. |
| Live insertion/extraction support | Robust ESD (2kV HBM) and latch-up immunity (>500mA) allow hot-swap in modular backplane systems. |
| +64mA/–32mA output drive | Directly interfaces with legacy TTL loads or drives long traces without series termination resistors. |
Applications
| Industrial Backplane Interface | Memory Expansion Subsystem |
|---|---|
Use Scenario: Interfacing CPU local bus to peripheral slot backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional data transceiver managing 8-bit address/data multiplexing under DIR-controlled flow direction. Use Value: Eliminates need for separate directional buffers and reduces component count by consolidating A/B port inversion and 3-State control. | Use Scenario: Extending 8-bit data bus between microcontroller and external SRAM or EPROM in embedded instrumentation. IC Role / Device Role / Timing Role: Inverting transceiver isolating memory bus from processor bus while maintaining timing integrity via sub-5ns propagation. Use Value: Enables clean bus separation with no added clock skew; supports concurrent read/write arbitration via OE gating. |
| Legacy System Bus Bridge | Test Equipment Data Capture |
Use Scenario: Bridging ISA-compatible control logic to modern FPGA-based I/O modules in retro-computing test rigs. IC Role / Device Role / Timing Role: Level-translating and direction-managed interface between 5V TTL ISA signals and FPGA I/O banks. Use Value: Provides deterministic inverting behavior and high-current drive needed for legacy bus loading compliance. | Use Scenario: Capturing parallel digital waveform data from DUT into high-speed acquisition buffer in ATE platforms. IC Role / Device Role / Timing Role: Transient bus isolator enabling glitch-free sampling window setup via synchronized OE assertion. Use Value: Guarantees bus release before capture start via fast 3-State disable (≤5.5ns tPLZ), preventing metastability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 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 external inversion if system-level logic demands inverting behavior on both ports. | Select when non-inverting data path simplifies upstream logic or eliminates need for inverters. |
| 74LVT640PW,118 | Lower VCC range (2.7–3.6V); 3.3V-only operation; reduced drive (±32mA); 3.5ns typical tPLH. | Not suitable for 5V legacy bus systems; intended for mixed-voltage 3.3V core/5V I/O architectures. | Choose for 3.3V domain integration where lower power and voltage compatibility outweigh 5V interoperability. |
Compared with SN74ABT245DBR and 74LVT640PW,118, the 74ABT640PW,118 uniquely delivers inverting transceivers in a 5V-optimized TSSOP package with highest sink current (64mA), making it optimal for driving legacy TTL loads without redesigning signal polarity or adding discrete inverters.
Availability
74ABT640PW,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, and legacy system bus bridges requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ABT640PW,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 delivering high-performance analog, logic, and interface solutions for automotive, industrial, and communications markets.
The 74ABT640PW,118 belongs to the ABT (Advanced BiCMOS Technology) logic family, engineered for high-speed, low-power 5V TTL-compatible bus interfacing in mission-critical industrial and telecom equipment.
FAQ
What is the logic polarity of the 74ABT640PW,118 data paths?
The 74ABT640PW,118 implements inverting logic on both A and B sides: a logic HIGH at A0 produces a logic LOW at B0 when DIR = L and OE = L, and vice versa. This inversion is inherent to the device architecture and applies regardless of direction setting, as confirmed in the FUNCTION TABLE and LOGIC SYMBOL sections of the Philips specification.
Does the 74ABT640PW,118 support hot-plug operation?
Yes, the 74ABT640PW,118 supports live insertion/extraction per its datasheet features list. It includes latch-up protection exceeding 500mA per JEDEC Std 17 and ESD protection >2000V HBM, enabling safe use in modular backplane systems where cards are inserted or removed while powered.
What is the maximum recommended load capacitance for the 74ABT640PW,118?
The 74ABT640PW,118 AC characteristics are specified with CL = 50pF, and its propagation delay (tPLH/tPHL) and output enable/disable times are characterized under that condition. While not explicitly rated beyond 50pF, the device's ±64mA drive strength allows stable operation with higher capacitance loads-up to ~100pF-provided trace impedance and slew rate constraints are observed.
How does the 74ABT640PW,118 behave during power-up?
The 74ABT640PW,118 features power-up 3-State: all B-side outputs remain in high-impedance until VCC stabilizes and control inputs settle. This prevents bus contention at power-on, as verified in the FEATURES section and supported by ICCZ and IPU/IPD DC electrical characteristics showing controlled leakage during VCC ramp.
Is the 74ABT640PW,118 pin-compatible with other 20-pin transceivers like the 74ABT245?
No, the 74ABT640PW,118 is not pin-compatible with the 74ABT245. Its pinout differs significantly: DIR is on pin 1 (vs. pin 1 on 74ABT245 being OE), and B-side I/Os occupy pins 11–18 (vs. pins 2–9 on 74ABT245). Direct replacement would require PCB layout revision due to incompatible signal mapping and inversion behavior.
74ABT640PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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-TSSOP
74ABT640PW,118 FAQ
1.How can I place an order for 74ABT640PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT640PW,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 74ABT640PW,118 reliable?
The price and inventory of 74ABT640PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT640PW,118 is usually 5 days.
3.What payment methods are accepted for 74ABT640PW,118?
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4.How is shipping managed for 74ABT640PW,118?
74ABT640PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT640PW,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 74ABT640PW,118?
For technical support, including 74ABT640PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT640PW,118 requirements.
6.How does Aetrix verify that 74ABT640PW,118 is sourced from the original manufacturer or authorized distributors?
All 74ABT640PW,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 74ABT640PW,118 meets industry standards.
7.What is the process for return or replacement of 74ABT640PW,118?
All 74ABT640PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT640PW,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 74ABT640PW,118 part is unused and in its original packaging.
Return procedure for 74ABT640PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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