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Texas Instruments SN74ABT16240ADLR
- Part No.:
- SN74ABT16240ADLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16240ADLR.pdf
- Description:
- IC BUFFER INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:298
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Product details
Overview
SN74ABT16240ADLR from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for high-density memory address, clock, and bus driver applications. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA output drive, features distributed VCC/GND pins to suppress switching noise, and is rated for –40°C to 85°C industrial operation.
For engineers reviewing the SN74ABT16240ADLR datasheet, SN74ABT16240ADLR pinout, SN74ABT16240ADLR application, or SN74ABT16240ADLR equivalent, this page provides verified functional identity, package-specific pin mapping (DL package), real-world timing and drive specifications, and validated alternative options for bus interface design.
Technical Context
The SN74ABT16240ADLR implements four independent 4-bit inverting buffers, each with symmetrical active-low output-enable (OE) control. Its EPIC-IIB BiCMOS architecture enables high-speed propagation (tPLH/tPHL ≤ 4.7 ns at 5 V, 25°C) while reducing power dissipation versus earlier TTL-compatible families.
Distributed VCC and GND pins across the 48-pin SSOP (DL) package minimize ground bounce (VOLP < 1 V) and supply noise during simultaneous switching. Flow-through pinout supports optimized PCB layout with input and output banks aligned on opposite sides of the package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5-V TTL and CMOS logic systems without level-shifting. |
| Output Drive | –32 mA IOH, +64 mA IOL - Sustains robust signal integrity driving heavy capacitive loads or multiple inputs on shared buses. |
| Propagation Delay | tPLH/tPHL ≤ 4.7 ns (max) - Enables reliable operation in high-speed address/data paths up to ~200 MHz toggle rate. |
| 3-State Enable Time | tPZH/tPZL ≤ 5.3 ns (max) - Supports fast bus arbitration and dynamic resource sharing in multiprocessor or DMA systems. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded control, instrumentation, and communications equipment. |
| Package | 48-pin SSOP (DL), 0.635 mm pitch - Surface-mount compatible with standard reflow profiles (MSL Level-1). |
| ESD Rating | 2000 V HBM, 200 V MM - Provides robust handling margin during board assembly and field service. |
Pinout & Package
SN74ABT16240ADLR is housed in a 48-pin Shrink Small-Outline Package (SSOP, DL), 12.6 mm × 5.3 mm body, 0.635 mm lead pitch, 1.2 mm max height. Pin 1 located at top-left corner with quadrants defined per TI tape-and-reel specification (Q1 orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 (pins 47,46,44,43,41,40,38,37,36,35,33,32,30,29,27,26) | Input (4 groups × 4 bits) | Accepts low-voltage TTL/CMOS logic levels; all unused inputs must be tied to VCC or GND. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 (pins 2,3,5,6,8,9,11,12,13,14,16,17,19,20,22,23) | Inverting Output (4 groups × 4 bits) | Provides true complement of corresponding A-input; high-drive capability supports fan-out > 32 LSTTL loads. |
| 1OE, 2OE, 3OE, 4OE (pins 1,24,25,48) | Active-Low Output Enable | Controls 4-bit group independently; tie to VCC via pull-up resistor for power-up high-impedance safety. |
| VCC (pins 7,18,31,42) | Power Supply | Distributed VCC connections reduce IR drop and supply noise during simultaneous output transitions. |
| GND (pins 4,10,15,21,28,34,39,45) | Ground Reference | Eight dedicated GND pins provide low-inductance return paths, critical for minimizing ground bounce (VOLP < 1 V). |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | –32 mA IOH, +64 mA IOL - Drives long traces, backplanes, or multiple receivers without external buffering. |
| Distributed Power/Ground | Four VCC and eight GND pins - Reduces simultaneous switching noise and improves signal integrity in dense layouts. |
| Flow-Through Architecture | Inputs on one side, outputs on opposite side - Enables straight trace routing, minimizes crosstalk, and simplifies layer stackup. |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V - Prevents false logic transitions in adjacent circuits during high-current output switching. |
| Latch-Up Immunity | Exceeds 500 mA per JESD17 - Ensures robustness against transient overvoltage events in noisy industrial environments. |
Applications
| Memory Address Buffering | System Clock Distribution |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing isolation, level translation, and fan-out expansion between controller and memory array. Use Value: High output drive ensures clean edges across 10+ cm traces; distributed VCC/GND prevents address glitches during burst reads/writes. |
Use Scenario: Distributing a single system clock to multiple peripherals (UART, SPI, ADC) requiring synchronized timing. IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer with independent enable control per 4-bit segment. Use Value: Propagation delay ≤ 4.7 ns and tskew minimized by flow-through layout ensure sub-nanosecond inter-peripheral skew. |
| PCI/ISA Bus Interface | Industrial Backplane Driver |
Use Scenario: Isolating and driving 16-bit data/address/control signals between CPU and legacy PCI or ISA expansion slots. IC Role / Device Role / Timing Role: Bidirectional-capable 3-state buffer enabling time-multiplexed bus sharing between master and slave devices. Use Value: Active-low OE inputs simplify bus arbitration logic; latch-up immunity protects against hot-plug transients. |
Use Scenario: Driving differential or single-ended signals across a 200-mm industrial backplane connecting PLC modules. IC Role / Device Role / Timing Role: Robust voltage-level translator and line driver supporting 5-V tolerant signaling over noisy chassis grounds. Use Value: 2000-V HBM ESD rating withstands factory handling; wide operating temperature ensures reliability in uncontrolled cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16244ADLR | Non-inverting output logic; otherwise identical pinout, drive strength, and timing. | Required where signal polarity must be preserved (e.g., direct data path without inversion compensation). | Select SN74ABT16244ADLR when system logic requires true (non-inverted) buffering; verify downstream logic accepts non-inverted data. |
| SN74LVC16244ADGGR | Lower voltage operation (1.65–3.6 V), reduced drive (±24 mA), smaller TSSOP-48 package (DGG). | Suitable for mixed-voltage 3.3-V systems but not 5-V bus interfaces; lacks latch-up immunity and high-noise immunity. | Choose SN74LVC16244ADGGR only for 3.3-V domains with lower drive needs; avoid in legacy 5-V industrial backplanes. |
Compared with SN74ABT16244ADLR and SN74LVC16244ADGGR, the SN74ABT16240ADLR uniquely delivers inverting logic, 5-V tolerance, and industrial-grade noise immunity in an SSOP package-making it optimal for legacy bus buffering where polarity inversion is acceptable and robustness is critical.
Availability
SN74ABT16240ADLR is available at Aetrix Electronics and suitable for industrial control systems, legacy bus interface designs, and embedded instrumentation requiring stable component supply and long-term manufacturability.
Supply support for SN74ABT16240ADLR 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 specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability interface ICs.
The SN74ABT16240ADLR belongs to TI's Widebus™ family of high-speed, high-drive bus interface devices, engineered specifically for memory addressing, clock distribution, and bus-oriented receiver/transmitter roles in industrial and computing systems.
FAQ
What is the function of the OE pins on the SN74ABT16240ADLR?
The SN74ABT16240ADLR has four active-low output-enable (OE) pins-1OE, 2OE, 3OE, and 4OE-each controlling a 4-bit buffer section independently. When an OE pin is low, its corresponding Y outputs reflect the inverted A inputs; when high, those outputs enter high-impedance state. To ensure safe power-up behavior, each OE should be pulled up to VCC via an external resistor.
Does the SN74ABT16240ADLR support 3.3-V input logic levels?
Yes-the SN74ABT16240ADLR accepts 3.3-V TTL/CMOS inputs reliably: its VIL is 0.8 V max and VIH is 2.0 V min, meaning a 3.3-V high signal (≥ 2.0 V) meets the guaranteed logic-high threshold. However, it requires a 4.5–5.5-V supply and outputs full 5-V swing, so it serves as a level translator from 3.3-V controllers to 5-V buses.
What is the maximum capacitive load the SN74ABT16240ADLR can drive while maintaining specified timing?
The SN74ABT16240ADLR's switching characteristics (e.g., tPLH, tPHL) are characterized at CL = 50 pF. While it can drive heavier loads due to its ±64 mA IOL, propagation delay increases linearly with capacitance. For loads exceeding 100 pF, derating curves in the datasheet show delays may exceed 6 ns; layout optimization (short traces, ground planes) is recommended for >75 pF loads.
Is the SN74ABT16240ADLR pin-compatible with other ABT-family 16-bit buffers?
Yes-the SN74ABT16240ADLR shares identical pinout and footprint with SN74ABT16244ADLR (non-inverting), SN74ABT16373ADLR (latch), and SN74ABT16543ADLR (transceiver) in the DL (SSOP-48) package. This allows functional substitution in existing layouts when logic function or directionality changes-but always verify OE polarity, input/output direction, and timing margins.
How does the distributed VCC/GND architecture improve noise performance in the SN74ABT16240ADLR?
The SN74ABT16240ADLR places four VCC and eight GND pins strategically across the 48-pin DL package to minimize current loop area and inductance. This reduces simultaneous switching output (SSO) noise-measured as ground bounce (VOLP < 1 V)-and stabilizes local supply rails during high-speed transitions, directly improving signal fidelity on shared buses.
SN74ABT16240ADLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- 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:
- 48-SSOP
SN74ABT16240ADLR FAQ
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Please submit a Request for Quotation (RFQ) for SN74ABT16240ADLR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74ABT16240ADLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16240ADLR is usually 5 days.
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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 SN74ABT16240ADLR?
For technical support, including SN74ABT16240ADLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16240ADLR requirements.
6.How does Aetrix verify that SN74ABT16240ADLR is sourced from the original manufacturer or authorized distributors?
All SN74ABT16240ADLR 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 SN74ABT16240ADLR meets industry standards.
7.What is the process for return or replacement of SN74ABT16240ADLR?
All SN74ABT16240ADLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16240ADLR, 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 SN74ABT16240ADLR part is unused and in its original packaging.
Return procedure for SN74ABT16240ADLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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