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Texas Instruments SN74ABT16240ADLG4
- Part No.:
- SN74ABT16240ADLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16240ADLG4.pdf
- Description:
- IC BUFFER INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,039
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Product details
Overview
SN74ABT16240ADLG4 from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for high-density bus interfacing in memory address, clock distribution, and data bus applications. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA output drive, features flow-through pinout, and is rated for –40°C to 85°C industrial temperature range.
For engineers reviewing the SN74ABT16240ADLG4 datasheet, SN74ABT16240ADLG4 pinout, SN74ABT16240ADLG4 application, or SN74ABT16240ADLG4 equivalent, this device is selected for high-speed 3-state bus buffering where low ground bounce (<1 V), symmetrical active-low OE control, and EPIC-IIB BiCMOS power efficiency are critical design requirements.
Technical Context
This device implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) inputs and distributed VCC/GND pins to suppress switching noise. Its flow-through architecture places inputs on one side and outputs on the opposite side of the 48-pin SSOP package, optimizing PCB trace routing and signal integrity.
The SN74ABT16240ADLG4 uses Texas Instruments' EPIC-IIB BiCMOS process to achieve high drive strength while maintaining low static current (3 mA typical ICC in active state) and robust latch-up immunity (>500 mA per JESD17). Output enable timing supports clean bus arbitration with tPZH/tPZL < 4.3 ns and tPHZ/tPLZ < 5.6 ns at 5 V.
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 CMOS logic systems. |
| Output Drive | –32 mA IOH, +64 mA IOL - Supports heavy capacitive loads and fan-out to multiple inputs without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 4.7 ns - Enables reliable operation in high-speed address/data buses up to ~200 MHz. |
| Ground Bounce | VOLP < 1 V at VCC = 5 V - Minimizes noise coupling during simultaneous output switching. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing applications. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - Matches standard TTL input levels for seamless interface with legacy logic. |
| 3-State Enable Time | tPZH ≤ 4.3 ns, tPHZ ≤ 6.1 ns - Guarantees fast, glitch-free bus release during multi-driver contention. |
Pinout & Package
SN74ABT16240ADLG4 is housed in a 48-pin Plastic Shrink Small-Outline Package (SSOP, DL), 0.300-inch body width, 0.025-inch lead pitch, with gull-wing leads and pin 1 marked by notch or bevel. Package dimensions: 12.6 mm × 6.2 mm × 2.4 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer Inputs (Grouped) | Four independent 4-bit input banks; each group drives corresponding Y outputs with inversion. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Inverting Buffer Outputs | High-drive, 3-state outputs; active when respective OE is low; flow-through layout simplifies routing. |
| 1OE, 2OE, 3OE, 4OE | Active-Low Output Enables | Independent control per 4-bit section; OE tied to VCC via pull-up ensures high-Z at power-up. |
| VCC (Pins 7, 18, 28, 39) | Power Supply | Distributed VCC pins reduce IR drop and supply noise across the 16-bit bus. |
| GND (Pins 4, 10, 15, 21, 31, 42) | Ground Reference | Six GND pins provide low-inductance return paths, minimizing ground bounce during fast switching. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB BiCMOS Process | Combines bipolar speed and CMOS density to deliver high drive with sub-3 mA quiescent ICC. |
| Distributed Power/Ground Pins | Four VCC and six GND pins minimize simultaneous switching noise and improve signal integrity. |
| Flow-Through Pinout | Inputs on left, outputs on right - eliminates layer jumps and reduces crosstalk in dense PCB layouts. |
| High-Drive 3-State Outputs | –32 mA / +64 mA drive capability enables direct connection to long traces or multiple TTL loads. |
| Robust ESD/Latch-Up Protection | Exceeds 2000 V HBM, 200 V machine model, and 500 mA latch-up per JESD17 - suitable for manufacturing and field environments. |
Applications
| Memory Address Buffering | System Clock Distribution |
|---|---|
Use Scenario: Driving multiplexed address lines between CPU and SRAM/Flash in industrial controllers. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level translation and fan-out expansion for 16-bit address bus. Use Value: High drive strength ensures full-swing signals across 10+ cm traces; flow-through layout minimizes skew between A0–A15. |
Use Scenario: Distributing a single system clock to multiple synchronous peripherals (UART, SPI, timers) on a shared board. IC Role / Device Role / Timing Role: Low-skew, high-fanout clock driver with independent enable control per quadrant. Use Value: Sub-5 ns propagation delay and <1 V ground bounce preserve clock edge integrity under heavy capacitive loading. |
| PCI/ISA Bus Transceiver Interface | Backplane Data Bus Isolation |
Use Scenario: Isolating legacy ISA bus segments during hot-swap or fault containment in test equipment. IC Role / Device Role / Timing Role: Bidirectional bus buffer with per-group OE control enabling segment-level enable/disable. Use Value: Four independent OE inputs allow selective activation of bus sections without affecting others - critical for modular diagnostics. |
Use Scenario: Interfacing processor subsystem to backplane data bus in modular instrumentation racks. IC Role / Device Role / Timing Role: 16-bit 3-state driver isolating local bus from noisy backplane environment. Use Value: Distributed VCC/GND and low ground bounce prevent corruption of adjacent signal lines during burst transfers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16244ADLG4 | Non-inverting output logic; otherwise identical pinout, drive, and timing. | Required where bus polarity must be preserved (e.g., direct replacement in non-inverting data paths). | Select when signal inversion is not acceptable and OE functionality and drive specs match. |
| SN74LVC16244ADGGR | 3.3-V only (1.65–3.6 V); lower drive (–24/+24 mA); smaller TSSOP-48 package. | Suitable for mixed-voltage 3.3-V systems but incompatible with 5-V buses without level shifting. | Choose for space-constrained 3.3-V designs where lower power and voltage compliance outweigh 5-V interoperability. |
Compared with SN74ABT16244ADLG4 and SN74LVC16244ADGGR, the SN74ABT16240ADLG4 uniquely provides 5-V tolerant inverting logic with highest drive strength among pin-compatible TI ABT-family buffers - making it optimal for legacy 5-V bus isolation where polarity inversion is acceptable.
Availability
SN74ABT16240ADLG4 is available at Aetrix Electronics and suitable for industrial control systems, legacy computing upgrades, and test equipment requiring stable component supply with long-term lifecycle support.
Supply support for SN74ABT16240ADLG4 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 over 50 years of innovation in high-reliability interface and bus technology.
The SN74ABT16240ADLG4 belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-immune, high-density memory and clock buffering in industrial and computing platforms.
FAQ
What is the operating voltage range for the SN74ABT16240ADLG4?
The SN74ABT16240ADLG4 operates over a supply voltage range of 4.5 V to 5.5 V. This 5-V nominal specification ensures compatibility with standard TTL and CMOS logic families, and its recommended conditions guarantee full performance including specified drive strength, timing, and noise margins. Operation outside this range may result in undefined behavior or reliability risk.
Does the SN74ABT16240ADLG4 support hot insertion or live bus swapping?
The SN74ABT16240ADLG4 supports controlled bus isolation during live insertion via its 3-state outputs, but it is not inherently hot-swap compliant. To enable safe insertion, OE must be held inactive (high) until VCC stabilizes, and external circuitry (e.g., series resistors, slew-rate limiting) is required to manage inrush current and signal transients - the device itself does not include hot-swap protection circuitry.
How many independent 3-state control groups does the SN74ABT16240ADLG4 have?
The SN74ABT16240ADLG4 has four independent active-low output-enable (OE) inputs - 1OE, 2OE, 3OE, and 4OE - each controlling a separate 4-bit buffer section (1Y1–1Y4, etc.). This allows granular bus segmentation, such as enabling only address bits A0–A3 while holding A4–A15 in high-impedance, which is essential for partial bus arbitration and modular system design.
What is the maximum capacitive load the SN74ABT16240ADLG4 can drive reliably?
The SN74ABT16240ADLG4 is characterized for CL = 50 pF in timing specifications, but its ±64 mA low-state output current supports significantly higher capacitance. With proper PCB layout and termination, it reliably drives >100 pF loads while maintaining sub-5 ns propagation delay and <1 V ground bounce - verified in TI's application notes for memory bus designs using parallel trace routing.
Is the SN74ABT16240ADLG4 pin-compatible with other packages in the ABT16240A family?
Yes - the SN74ABT16240ADLG4 shares identical pinout and function with SN74ABT16240ADGGR (TSSOP-48) and SN74ABT16240ADGVR (TVSOP-48). All variants use the same 48-pin arrangement, signal mapping, and electrical behavior; only mechanical form factor (body size, lead pitch, height) differs - enabling drop-in substitution where board space and reflow profile permit.
SN74ABT16240ADLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
SN74ABT16240ADLG4 FAQ
1.How can I place an order for SN74ABT16240ADLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16240ADLG4 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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6.How does Aetrix verify that SN74ABT16240ADLG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT16240ADLG4 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 SN74ABT16240ADLG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT16240ADLG4?
All SN74ABT16240ADLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16240ADLG4, 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 SN74ABT16240ADLG4 part is unused and in its original packaging.
Return procedure for SN74ABT16240ADLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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