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Texas Instruments SN74ABT16240ADGG
- Part No.:
- SN74ABT16240ADGG
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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SN74ABT16240ADGG.pdf
- Description:
- INVERTER QUAD 4-INPUT 48TSSOP
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Product details
Overview
SN74ABT16240ADGG from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for high-density memory address, clock, and bus interface applications. It features symmetrical active-low output-enable (OE) inputs, high-drive capability (–32 mA IOH / 64 mA IOL), distributed VCC/GND pinning to suppress switching noise, and operates over –40°C to 85°C.
For engineers reviewing the SN74ABT16240ADGG datasheet, SN74ABT16240ADGG pinout, SN74ABT16240ADGG application, or SN74ABT16240ADGG equivalent, this device serves as a high-speed, low-ground-bounce logic interface for industrial control backplanes, telecom line cards, and embedded system data buses requiring robust 5-V TTL-compatible drive and precise 3-state timing control.
Technical Context
The SN74ABT16240ADGG implements four independent 4-bit inverting buffers, each with dedicated active-low OE control (1OE–4OE), enabling flexible partitioning into 4×4-bit, 2×8-bit, or 1×16-bit configurations. Its EPIC-IIB BiCMOS architecture delivers fast propagation delays (tPLH/tPHL ≤ 4.7 ns at VCC = 5 V, CL = 50 pF) while minimizing power dissipation and ground bounce (VOLP < 1 V).
It uses a flow-through pinout and distributed power/ground layout to reduce crosstalk and PCB routing complexity. Input thresholds are TTL-compatible (VIH = 2 V, VIL = 0.8 V), and outputs maintain rail-to-rail swing under heavy load, supporting direct interfacing with legacy 5-V systems without level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and CMOS systems while tolerating supply ripple. |
| Output Drive (IOL / IOH) | 64 mA sink / –32 mA source - Supports driving multiple TTL loads or long traces without external buffering. |
| Propagation Delay (tPLH/tPHL) | ≤ 4.7 ns (max) at 5 V - Enables reliable operation in high-speed address/data bus applications up to ~100 MHz. |
| Ground Bounce (VOLP) | < 1 V at VCC = 5 V, TA = 25°C - Reduces signal integrity risk during simultaneous output switching in dense PCB layouts. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded systems including automation controllers and network equipment. |
| Input Capacitance (Ci) | 3.5 pF - Minimizes loading on upstream drivers and preserves signal edge rates in fanout-critical paths. |
| Thermal Resistance (θJA) | 89°C/W (DGG package) - Allows sustained operation at full drive strength without forced airflow in compact enclosures. |
Pinout & Package
TSSOP-48 (DGG) package: 48-pin thin shrink small-outline, 0.5 mm pitch, 12.6 mm × 6.1 mm body, 1.2 mm max height, moisture sensitivity level 1 (260°C reflow compatible).
| 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 signals for four 4-bit inverting buffers | Accept TTL-level logic; each group maps to corresponding Y outputs with inversion. |
| 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) | Inverted buffered outputs with 3-state control | Drive downstream loads; high-impedance when respective OE is high. |
| 1OE–4OE (pins 1,24,25,48) | Active-low output-enable controls | Each independently enables/disables one 4-bit buffer section; tied to VCC via pull-up for power-up high-Z safety. |
| VCC (pins 7,21,34,45) | Distributed power supply connections | Four VCC pins minimize IR drop and high-frequency impedance, reducing simultaneous switching noise. |
| GND (pins 4,10,15,28,31,39,42) | Distributed ground connections | Seven GND pins provide low-inductance return paths, critical for maintaining VOLP & VOH stability. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | –32 mA IOH / 64 mA IOL enables direct drive of 10+ TTL loads or 50-Ω transmission lines without external buffers. |
| Low Ground Bounce | VOLP < 1 V ensures signal integrity during multi-bit switching-critical for error-free memory addressing and clock distribution. |
| Flow-Through Pinout | Input–output alignment across top/bottom edges simplifies layer routing and reduces trace length mismatch in parallel bus designs. |
| Distributed Power/Ground | 4× VCC + 7× GND pins lower AC impedance and suppress simultaneous switching output (SSO) noise in high-speed digital systems. |
| Widebus™ Architecture | Optimized for density and performance in 3-state memory and bus applications-supports compact, high-pin-count board layouts. |
Applications
| Memory Address Buffering | Backplane Data Bus Interface |
|---|---|
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-shifting, and fanout expansion between controller and memory array. Use Value: Eliminates need for discrete transistors or additional logic; supports hot-swap enable/disable per memory bank via individual OE control. |
Use Scenario: Interfacing a CPU local bus to a 16-bit parallel backplane in industrial PLC or telecom line card. IC Role / Device Role / Timing Role: Bidirectional bus driver with controlled 3-state timing, ensuring clean bus release before next master asserts. Use Value: Meets tight tPZL/tPHZ specs (≤7.2 ns) to prevent bus contention; high drive strength maintains signal integrity over 15 cm traces. |
| Clock Distribution Network | Legacy System Bus Expansion |
Use Scenario: Distributing a 5-V clock signal to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) with matched skew. IC Role / Device Role / Timing Role: Low-skew inverting buffer replicating and strengthening clock edges while preserving duty cycle. Use Value: Propagation delay matching across all 16 outputs (±0.5 ns typical) minimizes clock skew across subsystems. |
Use Scenario: Extending ISA or PC/104 bus signals in retro-computing or legacy test equipment upgrades. IC Role / Device Role / Timing Role: TTL-compatible 3-state repeater restoring signal amplitude and timing margins degraded by long connectors or stubs. Use Value: 64-mA sink current restores logic low levels below 0.55 V even after 30 cm ribbon cable runs with multiple stubs. |
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 |
|---|---|---|---|
| SN74ABT16244ADGG | Non-inverting output logic; identical pinout, drive strength, and timing specs. | Suitable where signal polarity must be preserved (e.g., data bus forwarding without inversion). | Select when system logic requires true (non-inverted) buffering rather than complemented outputs. |
| SN74LVC16244ADGGR | 3.3-V only operation; lower drive (24 mA IOL), higher speed (tPD ≈ 3.4 ns), LVTTL input thresholds. | Requires level translation for 5-V systems; optimized for low-voltage mixed-signal boards. | Choose for new 3.3-V designs prioritizing power efficiency and faster timing; not drop-in for 5-V legacy interfaces. |
Compared with SN74ABT16240ADGG, SN74ABT16244ADGG provides identical 5-V performance with non-inverting logic, while SN74LVC16244ADGGR trades voltage compatibility for lower power and higher speed in modern 3.3-V domains-neither is pin-compatible without schematic or voltage domain changes.
Availability
SN74ABT16240ADGG is available at Aetrix Electronics and suitable for industrial control backplanes, telecom line card interconnects, and embedded memory subsystems requiring stable component supply, long-term lifecycle support, and guaranteed 5-V TTL interoperability.
Supply support for SN74ABT16240ADGG 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 expertise in high-reliability interface ICs for industrial and communications infrastructure.
The SN74ABT16240ADGG belongs to TI's Widebus™ family of advanced 3-state buffers, engineered specifically to solve high-density, high-speed bus loading and noise challenges in memory, clock, and backplane applications.
FAQ
What is the recommended power-up sequence for SN74ABT16240ADGG to ensure high-impedance outputs?
TI specifies that OE inputs must be held high (inactive) during power-up to guarantee outputs remain in high-impedance state. Tie each OE (pins 1, 24, 25, 48) to VCC via a pull-up resistor; minimum value depends on driver sink capability but ≥10 kΩ is typical. This prevents bus contention before system initialization completes. The SN74ABT16240ADGG does not include internal power-on reset circuitry, so external OE control is mandatory.
Can SN74ABT16240ADGG drive 50-Ω transmission lines directly?
Yes-the SN74ABT16240ADGG's 64-mA IOL and –32-mA IOH allow direct termination of 50-Ω lines in unterminated or series-terminated configurations. At 5 V, it delivers >100 mW into 50 Ω, sustaining clean logic levels (VOL ≤ 0.55 V) even under full load. For controlled-impedance PCBs, use series resistors near the driver output to match trace Z₀ and suppress reflections.
Does SN74ABT16240ADGG support hot-swap insertion into a live 5-V bus?
No-SN74ABT16240ADGG is not hot-swap rated. Its absolute maximum ratings permit only brief exposure to VCC = 0 V while inputs/outputs are biased, but no built-in current limiting or slew control protects against insertion transients. For live-backplane applications, add external series resistors (e.g., 10–22 Ω) and TVS diodes on all I/O lines before using SN74ABT16240ADGG in hot-plug scenarios.
How does the distributed VCC/GND layout in SN74ABT16240ADGG reduce switching noise?
The SN74ABT16240ADGG places four VCC (pins 7, 21, 34, 45) and seven GND (pins 4, 10, 15, 28, 31, 39, 42) pins strategically across the TSSOP-48 footprint. This lowers high-frequency loop inductance, distributes return currents, and decouples switching events across the die-reducing simultaneous switching output (SSO) noise and keeping VOLP below 1 V, as verified in TI's characterization data.
Is SN74ABT16240ADGG RoHS compliant and lead-free?
Yes-SN74ABT16240ADGG is RoHS compliant with lead-free (NIPDAU) terminal finish, per TI's packaging addendum. It carries MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is qualified for peak reflow at 260°C. The part marking "ABT16240A" appears on the top surface, and full compliance documentation is available in TI's official product change notices.
SN74ABT16240ADGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
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- Input Type:
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- Output Type:
- -
- Current - Output High, Low:
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- Voltage - Supply:
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- Operating Temperature:
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- Grade:
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SN74ABT16240ADGG FAQ
1.How can I place an order for SN74ABT16240ADGG through Aetrix?
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6.How does Aetrix verify that SN74ABT16240ADGG is sourced from the original manufacturer or authorized distributors?
All SN74ABT16240ADGG 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 SN74ABT16240ADGG meets industry standards.
7.What is the process for return or replacement of SN74ABT16240ADGG?
All SN74ABT16240ADGG units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16240ADGG, 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 SN74ABT16240ADGG part is unused and in its original packaging.
Return procedure for SN74ABT16240ADGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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