My Inquiry
My Account
NXP Semiconductors 74ABT640D,623
- Part No.:
- 74ABT640D,623
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT640D,623.pdf
- Description:
- IC TXRX INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,181
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74ABT640D,623 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), and operates across –40°C to +85°C. Used in backplane data routing and memory expansion subsystems where signal integrity and bus contention avoidance are critical.
For engineers reviewing the 74ABT640D,623 datasheet, 74ABT640D,623 pinout, 74ABT640D,623 application, or 74ABT640D,623 equivalent, key selection criteria include direction-pin-controlled bidirectional flow, inverting logic behavior on both A and B ports, guaranteed 3-State power-up behavior, live insertion capability, and SO20 package compatibility with JEDEC MS-013 standards.
Technical Context
The 74ABT640D,623 implements a dual-rail BiCMOS architecture enabling high-speed operation with low static current. Its DIR input selects data flow direction (A→B or B→A), while active-low OE disables all B-side outputs to A-side, placing them in high-impedance state. Both A and B port I/Os invert signals regardless of direction.
Propagation delay is symmetric (tPLH/tPHL ≤ 4.9ns over full temperature range), and 3-State enable/disable times (tPZH/tPLZ ≤ 7.3ns, tPHZ/tPLZ ≤ 6.8ns) ensure tight timing margins in synchronous bus designs. Input and I/O capacitances (4pF/7pF) support clean edge rates up to 5ns/V transition rate.
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 >200MHz bus clocking with margin for trace delays. |
| Output Drive | +64mA sink / –32mA source - Drives heavy capacitive loads (e.g., 10+ TTL inputs) without external buffers. |
| I/O Capacitance | 7pF (disabled) - Minimizes stub reflections and crosstalk in high-density PCB layouts. |
| Input Clamp Voltage | –1.2V (VIK, IIK=–18mA) - Protects against negative transients during hot-swap events. |
| Power-Up 3-State | Guaranteed at VCC ramp - Prevents bus contention during system power sequencing. |
| ESD Protection | 2000V HBM, 200V MM - Meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
74ABT640D,623 is housed in a 20-pin plastic small outline package (SO20, SOT163-1), 7.5mm body width, JEDEC MS-013 compliant, with 1.27mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | Low = A→B data flow; High = B→A; determines inversion path for both directions. |
| 2–9 (A0–A7) | A-side bidirectional I/O | Inverting inputs/outputs; connected to local bus or controller side; high-impedance when OE active and DIR mismatched. |
| 11–18 (B0–B7) | B-side bidirectional I/O | Inverting inputs/outputs; connected to peripheral or memory bus; driven only when OE inactive and DIR matches flow direction. |
| 10 (GND) | Ground reference | 0V return for all internal logic and output stages; requires low-inductance connection to minimize ground bounce. |
| 20 (VCC) | Positive supply | 5V DC supply; decoupling capacitor (100nF) required within 5mm for stable switching performance. |
| 19 (OE) | Output enable (active-low) | When Low, enables B-side drivers per DIR setting; when High, forces all B-side pins to high-impedance regardless of DIR. |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional interface | Single device replaces two 74-series octal buffers, reducing board area and interconnect complexity in bus arbitration circuits. |
| Live insertion/extraction support | Withstands hot-plug events without latch-up (≥500mA per JESD17), enabling modular backplane architectures with zero downtime. |
| Inverting transceiver logic | Signal inversion occurs on both A→B and B→A paths, simplifying timing analysis in systems requiring consistent polarity across bidirectional lanes. |
| Power-up 3-State guarantee | Outputs remain high-impedance until VCC exceeds 2.1V, eliminating bus conflicts during power-rail ramp-up sequences. |
| High noise immunity | VIL = 0.8V / VIH = 2.0V thresholds provide ≥0.4V noise margin against TTL-level interference in mixed-signal environments. |
Applications
| Memory Expansion Interface | Backplane Data Routing |
|---|---|
|
Use Scenario: Interfacing a microcontroller's address/data bus to external SRAM or EPROM banks with separate read/write strobes. IC Role / Device Role / Timing Role: Bidirectional data transceiver managing multiplexed AD bus lines; DIR synchronized with RD/WR control, OE gated by chip select. Use Value: Eliminates need for discrete direction logic and dual octal buffers, reducing component count by 3 devices while maintaining <4.9ns round-trip latency. |
Use Scenario: Isolating and routing parallel data between CPU module and I/O carrier card in modular industrial PLC chassis. IC Role / Device Role / Timing Role: Hot-swappable bus repeater enabling live module replacement; DIR set statically per slot, OE controlled per-card presence detection. Use Value: Supports live insertion with no bus glitches due to guaranteed power-up 3-State and ±64mA drive into 50pF/channel backplane traces. |
| Legacy ISA Bus Extension | Digital Test Equipment Bus Interface |
|
Use Scenario: Extending ISA bus signals across daughterboard connectors where signal integrity degrades beyond 10cm trace length. IC Role / Device Role / Timing Role: Signal repeater with direction control matching ISA's /IOR and /IOW strobes; DIR tied to /IOR, OE to /MEMR. Use Value: Restores signal slew rate and fanout capacity using 3.1ns typical delay and 7pF I/O capacitance-critical for reliable 8MHz ISA timing. |
Use Scenario: Connecting FPGA-based pattern generator to DUT via parallel 8-bit test bus with programmable directionality. IC Role / Device Role / Timing Role: Reconfigurable data path element; DIR and OE driven by FPGA GPIO to switch between stimulus (FPGA→DUT) and capture (DUT→FPGA) modes. Use Value: Enables single-cable bidirectional test interface with sub-5ns timing resolution and no external level shifters due to native 5V TTL compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT640DBR | TI SOIC-20 variant; identical AC/DC specs but tighter VIL/VIH (0.8V/2.0V vs 0.7V/2.0V); 100% compatible pinout and function. | Same use cases; preferred in TI-centric BOMs with existing TI qualification workflows. | Select when sourcing from TI distribution channels or aligning with TI's ABT family documentation ecosystem. |
| 74LVT640PW,118 | NXP TSSOP-20 variant; lower 3.3V supply (2.7–3.6V), 3.3ns delay, 24mA drive; not voltage-compatible with 5V systems. | Requires level translation in 5V environments; suited for mixed-voltage systems with 3.3V peripherals. | Choose only for new 3.3V designs; incompatible drop-in replacement for 5V operation of 74ABT640D,623. |
Compared with SN74ABT640DBR and 74LVT640PW,118, the 74ABT640D,623 delivers optimal 5V bus drive strength and timing margin for legacy industrial controllers, while the TI part offers identical functionality with alternate logistics, and the LVT variant serves distinct low-voltage applications requiring voltage translation.
Availability
74ABT640D,623 is available at Aetrix Electronics and suitable for memory expansion interfaces, backplane data routing, legacy ISA bus extension, and digital test equipment bus interfaces requiring stable component supply and long-term industrial availability.
Supply support for 74ABT640D,623 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 74ABT640D,623 belongs to NXP's ABT (Advanced BiCMOS Technology) logic family, engineered for high-speed, high-drive 5V TTL-compatible bus interfacing in mission-critical industrial control and instrumentation systems.
FAQ
What is the operating voltage range for the 74ABT640D,623?
The 74ABT640D,623 operates over a recommended supply voltage range of 4.5V to 5.5V. Absolute maximum ratings allow VCC up to +7.0V, but sustained operation outside 4.5–5.5V may compromise timing, drive strength, or reliability. All AC and DC specifications-including 3.1ns propagation delay and ±64mA output drive-are guaranteed only within the 4.5–5.5V range specified in the Philips product specification.
Does the 74ABT640D,623 support live insertion in backplane systems?
Yes, the 74ABT640D,623 supports live insertion and extraction per its design: it features latch-up protection exceeding 500mA (JESD17) and ESD immunity of 2000V HBM. Its power-up 3-State behavior ensures outputs remain high-impedance until VCC stabilizes above 2.1V, preventing bus contention during hot-swap events-making it suitable for modular industrial backplanes.
How does the direction control (DIR) and output enable (OE) interact in the 74ABT640D,623?
In the 74ABT640D,623, OE is active-low and overrides DIR: when OE is High, all B-side outputs go high-impedance regardless of DIR state. When OE is Low, DIR determines direction-DIR Low enables A→B flow, DIR High enables B→A flow. Both paths apply inverting logic, and A-side I/Os always reflect inverted values of the driven side.
Is the 74ABT640D,623 pin-compatible with other packages of the same family?
Yes, the 74ABT640D,623 (SO20, SOT163-1) shares identical pin configuration and electrical behavior with other 74ABT640 variants including the DIP (SOT146-1), SSOP (SOT339-1), and TSSOP (SOT360-1) packages. Pin 1 (DIR), pins 2–9 (A0–A7), pins 11–18 (B0–B7), pin 10 (GND), pin 20 (VCC), and pin 19 (OE) are functionally and physically mapped identically across all packages.
What is the maximum capacitive load the 74ABT640D,623 can drive while maintaining timing specs?
The 74ABT640D,623 AC characteristics-including 4.9ns max propagation delay and 7.3ns max 3-State enable time-are specified with CL = 50pF. Driving loads beyond 50pF increases delay nonlinearly; for loads up to 100pF, empirical validation shows delay increase ≤1.8ns. For >100pF, derating or buffer staging is recommended to maintain timing closure in high-speed designs.
74ABT640D,623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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-SO
74ABT640D,623 FAQ
1.How can I place an order for 74ABT640D,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT640D,623 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 74ABT640D,623 reliable?
The price and inventory of 74ABT640D,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT640D,623 is usually 5 days.
3.What payment methods are accepted for 74ABT640D,623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT640D,623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT640D,623?
74ABT640D,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT640D,623 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 74ABT640D,623?
For technical support, including 74ABT640D,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT640D,623 requirements.
6.How does Aetrix verify that 74ABT640D,623 is sourced from the original manufacturer or authorized distributors?
All 74ABT640D,623 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 74ABT640D,623 meets industry standards.
7.What is the process for return or replacement of 74ABT640D,623?
All 74ABT640D,623 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT640D,623, 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 74ABT640D,623 part is unused and in its original packaging.
Return procedure for 74ABT640D,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ABT640D,623 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
