My Inquiry
My Account
Texas Instruments SN74ABT2240APW
- Part No.:
- SN74ABT2240APW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABT2240APW.pdf
- Description:
- IC BUFFER INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:770
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT2240APW from Texas Instruments is an octal inverting buffer/line driver with 3-state outputs, designed for memory address and bus-oriented applications. It features dual 4-bit channels, symmetrical active-low output-enable (OE) inputs, 25-Ω integrated series output resistors, ±12 mA output drive, and operates from 4.5 V to 5.5 V over –40°C to 85°C.
For engineers reviewing the SN74ABT2240APW datasheet, SN74ABT2240APW pinout, SN74ABT2240APW application, or SN74ABT2240APW equivalent, key selection criteria include 3-state bus driving capability, output-ground-bounce suppression (<1 V), latch-up immunity (>500 mA), and TSSOP-20 packaging for high-density PCB layouts.
Technical Context
This device implements two independent 4-bit inverting buffer sections, each with dedicated OE control. Each output includes on-die 25-Ω series resistance to dampen signal reflections without external termination. The EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible input thresholds and 5-V operation.
Logic behavior is strictly defined: when OE is low, inverted A→Y data passes; when OE is high, outputs enter high-impedance state. To ensure safe power-up/power-down states, OE must be pulled up to VCC via an external resistor sized per driver sink capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and mixed-voltage systems. |
| Output drive | ±12 mA - Supports direct connection to 50-Ω transmission lines and fan-out to ≥20 LSTTL loads. |
| Propagation delay | 1 ns (min) to 4.8 ns (max) at 5 V - Enables reliable operation in high-speed address/data bus timing windows. |
| Output impedance | 25 Ω series - Eliminates need for external series termination resistors on PCB traces. |
| Operating temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing applications. |
| Input threshold | VIL = 0.8 V, VIH = 2.0 V - Matches standard TTL logic levels for seamless interface with legacy controllers. |
| ESD rating | 2000 V HBM - Provides robust handling during board assembly and field service. |
Pinout & Package
TSSOP-20 package (PW), 6.5 mm × 4.4 mm × 1.2 mm height, lead pitch 0.65 mm, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit section; high = high-Z, low = enabled/inverted output. |
| 1A1–1A4, 2A1–2A4 | Data inputs | Inverting inputs for respective Y outputs; TTL-compatible thresholds and 4-pF input capacitance. |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting buffered outputs | Drive up to 12 mA sink/source; include internal 25-Ω series resistance for clean edge control. |
| VCC, GND | Power supply terminals | Single 5-V supply; decoupling required within 10 mm of pins 10 and 11 per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Eliminates external termination components and reduces PCB area and BOM count. |
| EPIC-IIB BiCMOS process | Reduces dynamic power vs. pure bipolar while retaining TTL speed and drive strength. |
| Low output ground bounce | VOLP < 1 V at VCC = 5 V - Minimizes noise coupling into shared ground planes during switching. |
| Latch-up immunity | Exceeds 500 mA per JESD17 - Ensures robustness against transient current faults in dense digital systems. |
| High-impedance power-up default | OE tied to VCC ensures outputs remain disabled until system firmware asserts control - prevents bus contention. |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
Use Scenario: Driving 20-bit address buses between microcontroller and SRAM/Flash in industrial controllers. IC Role / Device Role / Timing Role: Inverting octal buffer with independent OE control isolates CPU address lines from memory load and enables time-multiplexed access. Use Value: Integrated 25-Ω resistors suppress overshoot on 50-Ω PCB traces, eliminating timing skew from reflection-induced ringing. | Use Scenario: Bidirectional data bus isolation between FPGA and peripheral ASIC in test equipment. IC Role / Device Role / Timing Role: Dual 4-bit channel provides direction-controlled buffering; OE signals synchronized to bus arbitration logic. Use Value: ±12 mA drive supports stub-free routing across 10 cm backplane traces without signal integrity degradation. |
| Clock Distribution Fan-out | Legacy System Bus Extension |
Use Scenario: Distributing a 25-MHz system clock to multiple synchronous peripherals in telecom line cards. IC Role / Device Role / Timing Role: Low-skew inverting buffer with matched tPLH/tPHL (1–4.8 ns) maintains phase alignment across fan-out paths. Use Value: 4.5–5.5 V supply range allows operation alongside 5-V clock synthesizers without level-shifting. | Use Scenario: Extending ISA or LPC bus signals from legacy x86 host to custom I/O daughterboard. IC Role / Device Role / Timing Role: TTL-compatible VIH/VIL thresholds and 20-pin TSSOP footprint match vintage bus timing and layout constraints. Use Value: Latch-up immunity >500 mA protects against ESD events common in field-replaceable module insertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT2244APW | Non-inverting output polarity; identical pinout, timing, and drive specs. | Required where signal polarity preservation is mandatory (e.g., clock forwarding, non-inverted data paths). | Select SN74ABT2244APW only when inversion must be avoided; otherwise SN74ABT2240APW provides same density and performance. |
| SN74LVC244APW | 3.3-V only operation (1.65–3.6 V); lower drive (±24 mA), no integrated series resistors. | Suitable for modern low-voltage systems but requires external termination and level-shifting for 5-V interfaces. | Choose SN74LVC244APW for 3.3-V domains; SN74ABT2240APW remains optimal for 5-V legacy or mixed-signal bus interfacing. |
Compared with SN74ABT2244APW and SN74LVC244APW, the SN74ABT2240APW uniquely combines 5-V TTL compatibility, built-in 25-Ω termination, and industrial temperature range - making it the only drop-in solution for upgrading aging 5-V bus drivers without layout or firmware changes.
Availability
SN74ABT2240APW is available at Aetrix Electronics and suitable for memory address buffering, bus transceiver interface, and clock distribution requiring stable component supply across industrial, computing, and test equipment programs.
Supply support for SN74ABT2240APW 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
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74ABT2240A belongs to TI's ABT logic family - engineered for high-speed, low-noise 5-V bus interfacing with integrated termination and robust ESD/latch-up protection.
FAQ
What is the function of the SN74ABT2240APW?
The SN74ABT2240APW is an octal inverting buffer with 3-state outputs, organized as two independent 4-bit sections. Each section inverts input data (A→Y) when its OE pin is low; outputs go high-impedance when OE is high. It integrates 25-Ω series resistors per output to reduce signal reflections on PCB traces.
Does the SN74ABT2240APW require external termination resistors?
No. The SN74ABT2240APW includes equivalent 25-Ω series resistors on all eight outputs, eliminating the need for external series termination. This simplifies PCB layout, reduces component count, and improves signal integrity on controlled-impedance traces up to 50 Ω.
What is the recommended power-up sequence for the SN74ABT2240APW?
To prevent bus contention during power-up, OE pins must be held high (disabled) until VCC stabilizes. TI recommends tying 1OE and 2OE to VCC via a pull-up resistor; minimum value depends on the driver's sink capability - typically 4.7 kΩ suffices for most microcontroller GPIOs.
Can the SN74ABT2240APW operate at 3.3 V?
No. The SN74ABT2240APW is specified only for 4.5 V to 5.5 V operation. Its input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive are optimized for 5-V TTL systems. For 3.3-V applications, consider the SN74LVC244APW instead.
What package type does the SN74ABT2240APW use?
The SN74ABT2240APW uses a 20-pin Thin Shrink Small-Outline Package (TSSOP-PW), measuring 6.5 mm × 4.4 mm × 1.2 mm with 0.65 mm lead pitch. It is RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating for unlimited floor life.
SN74ABT2240APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74ABT2240APW FAQ
1.How can I place an order for SN74ABT2240APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2240APW 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 SN74ABT2240APW reliable?
The price and inventory of SN74ABT2240APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2240APW is usually 5 days.
3.What payment methods are accepted for SN74ABT2240APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT2240APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT2240APW?
SN74ABT2240APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2240APW 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 SN74ABT2240APW?
For technical support, including SN74ABT2240APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2240APW requirements.
6.How does Aetrix verify that SN74ABT2240APW is sourced from the original manufacturer or authorized distributors?
All SN74ABT2240APW 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 SN74ABT2240APW meets industry standards.
7.What is the process for return or replacement of SN74ABT2240APW?
All SN74ABT2240APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2240APW, 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 SN74ABT2240APW part is unused and in its original packaging.
Return procedure for SN74ABT2240APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT2240APW 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…
