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Texas Instruments SN74ABT16240DL
- Part No.:
- SN74ABT16240DL
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ABT16240DL.pdf
- Description:
- BUS DRIVER, ABT SERIES, 4-BIT
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Inventory:507
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Product details
Overview
SN74ABT16240DL 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 systems. It delivers –32 mA IOH and 64 mA IOL drive strength, operates across –40°C to 85°C, and features symmetrical active-low OE inputs for precise bus control in industrial computing and telecom backplanes.
For engineers reviewing the SN74ABT16240DL datasheet, SN74ABT16240DL pinout, SN74ABT16240DL application, or SN74ABT16240DL equivalent, this page provides verified functional specifications, DL-package terminal mapping, thermal and drive capability context, and validated alternative options for bus driver replacement or redesign.
Technical Context
The SN74ABT16240DL implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) control. Its EPIC-IIB BiCMOS architecture enables low power dissipation while maintaining TTL-compatible input thresholds and 5-V supply operation.
It uses distributed VCC/GND pin placement and flow-through pinout to suppress ground bounce (<1 V typical VOLP) and minimize high-speed switching noise-critical for clean signal integrity in dense PCB layouts with parallel bus topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Inverting 16-bit buffer/driver with 3-state outputs |
| Supply Voltage | 5 V ±10% - ensures compatibility with legacy TTL and 5-V CMOS bus systems |
| Output Drive | –32 mA IOH / 64 mA IOL - supports heavy capacitive loads and fan-out to multiple receivers |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and telecom infrastructure use |
| Ground Bounce (VOLP) | <1 V at VCC = 5 V, TA = 25°C - reduces signal corruption during simultaneous output switching |
| Latch-Up Immunity | >500 mA per JEDEC JESD-17 - prevents destructive latch-up under transient overcurrent conditions |
Pinout & Package
Packaged in a 48-pin plastic shrink small-outline package (SSOP), designated DL, with 300-mil body width and 0.025-inch lead pitch. The DL package doubles I/O density versus standard SOIC while occupying identical PCB area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable inputs | Independent control of each 4-bit section; tie to VCC via pullup for Hi-Z on power-up/down |
| 1A1–1A4, 2A1–2A4, etc. | Input terminals (16 total) | Non-inverted logic inputs feeding internal inverters; TTL-compatible voltage thresholds |
| 1Y1–1Y4, 2Y1–2Y4, etc. | Inverted 3-state outputs (16 total) | High-drive buffered outputs; enter high-impedance state when corresponding OE is high |
| VCC (Pins 7, 21, 31, 42) | Power supply | Distributed VCC pins reduce IR drop and improve decoupling effectiveness across wide bus |
| GND (Pins 4, 15, 27, 38) | Ground reference | Distributed GND pins minimize ground loop inductance and suppress simultaneous switching noise |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB BiCMOS process | Reduces dynamic power vs. bipolar-only designs without sacrificing speed or drive |
| Flow-through architecture | Input and output pins aligned on opposite sides-simplifies layer routing and shortens trace lengths |
| Distributed VCC/GND pins | Four VCC and four GND pins placed strategically to lower impedance path and dampen switching transients |
| High-current 3-state outputs | 64 mA sink capability enables direct driving of unterminated stubs or multiple TTL inputs |
| Widebus™ family compatibility | Pin- and function-compatible with other TI Widebus devices for scalable bus design |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
|
Use Scenario: Driving multiplexed address lines from a microcontroller to multiple SRAM or Flash devices in a shared-bus system. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating and amplifying address signals with controlled enable timing. Use Value: High sink current (64 mA) ensures fast edge rates into 50-pF load; distributed GND/VCC maintains signal fidelity across all 16 lines. |
Use Scenario: Fan-out of a single system clock to multiple synchronous peripherals (e.g., ADCs, FPGAs, DACs). IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer with independent section enables for phased enable sequencing. Use Value: <1 V ground bounce prevents clock jitter; flow-through layout minimizes inter-channel skew between buffered outputs. |
| Data Bus Transceiver Interface | Industrial Backplane Driver |
|
Use Scenario: Bidirectional data bus isolation between processor and peripheral modules using external direction control. IC Role / Device Role / Timing Role: Unidirectional 16-bit buffer used in pairs (input + output sections) to emulate transceiver behavior. Use Value: Symmetrical OE inputs allow precise timing alignment with bus arbitration logic; –32/+64 mA drive handles long traces and connector parasitics. |
Use Scenario: Signal conditioning and level-shifting for 16-bit parallel control buses in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Robust bus driver hardened against ESD and latch-up in electrically noisy factory environments. Use Value: >500 mA latch-up immunity per JESD-17 and BiCMOS process tolerance ensure reliability in unregulated industrial power domains. |
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 |
|---|---|---|---|
| SN74LVT16240DL | Lower drive (–32 mA/64 mA same), but 3.3-V only; LVTTL input thresholds; higher speed (tPD ≈ 3.2 ns) | Requires 3.3-V supply and compatible logic family; unsuitable for mixed 5-V/3.3-V systems without level translation | Select when migrating to 3.3-V systems and speed is prioritized over 5-V interoperability |
| 74ABT16240PCB | Same logic and drive specs, but in 48-pin plastic DIP (PDIP) package; no flow-through pinout; higher inductance leads | Used in prototyping or legacy through-hole designs; lacks SSOP noise suppression features and board-area efficiency | Select only for hand-soldered evaluation or backward-compatible DIP-based systems where PCB real estate is not constrained |
Compared with SN74ABT16240DL, SN74LVT16240DL offers faster propagation but mandates 3.3-V operation, while 74ABT16240PCB retains full electrical equivalence at the cost of noise performance and density-making SN74ABT16240DL optimal for space-constrained, noise-sensitive 5-V industrial bus designs.
Availability
SN74ABT16240DL is available at Aetrix Electronics and suitable for industrial computing, telecom infrastructure, and programmable logic controller (PLC) applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74ABT16240DL 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 founded in 1930, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74ABT16240DL belongs to TI's Widebus™ family of high-performance bus interface ICs, engineered specifically to increase logic density and signal integrity in memory, clock, and data bus systems operating at 5 V.
FAQ
What is the recommended power-up sequence for SN74ABT16240DL to ensure reliable 3-state behavior?
TI specifies that OE inputs must be held high (inactive) during power-up to prevent bus contention. Tie each OE pin to VCC via a pullup resistor-minimum value determined by the driver's current-sinking capability. For SN74ABT16240DL, a 4.7-kΩ resistor is commonly used. This ensures all outputs remain in high-impedance until system firmware asserts OE low, avoiding glitches on shared buses.
Does SN74ABT16240DL support hot insertion or live insertion into a powered-backplane system?
SN74ABT16240DL is not rated for hot insertion. Its BiCMOS inputs lack explicit hot-swap protection circuitry, and the absence of bus-hold or Ioff features means floating inputs during partial power-up may cause undefined output states. For live-insertion applications, TI recommends adding external series resistors and clamping diodes-or selecting a purpose-built hot-swap buffer such as the SN74AVC16T245.
How does the flow-through pinout of SN74ABT16240DL improve PCB layout compared to traditional Z-fold arrangements?
The flow-through architecture places inputs on one side (e.g., top row) and corresponding inverted outputs on the opposite side (e.g., bottom row), enabling straight trace routing without layer jumps or vias between adjacent bits. This reduces crosstalk, lowers trace inductance, and simplifies length matching-especially critical for 16-bit parallel buses where skew must stay below 1 ns. Traditional Z-fold layouts force zigzag routing, increasing mismatch and EMI risk.
Can SN74ABT16240DL drive unterminated 50-Ω transmission lines directly?
No-SN74ABT16240DL is not a line-driver IC optimized for controlled-impedance transmission. Its 64-mA sink capability supports fan-out to multiple TTL loads or short PCB traces (<10 cm), but it lacks adjustable output impedance or pre-emphasis. For true 50-Ω line driving, TI recommends the SN65LVDS31 or SN65LVDS179. Use SN74ABT16240DL only for point-to-point or multidrop bus segments with proper termination at the far end.
Is SN74ABT16240DL compliant with RoHS and REACH regulations?
Yes-SN74ABT16240DL is manufactured in TI's RoHS-compliant and REACH-conformant facilities. The DL package uses lead-free matte-tin terminations and halogen-free molding compound. TI's official part status report (SLYO123) confirms full compliance with EU Directive 2011/65/EU (RoHS 2) and Regulation (EC) No. 1907/2006 (REACH), including SVHC screening.
SN74ABT16240DL 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:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ABT16240DL FAQ
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6.How does Aetrix verify that SN74ABT16240DL is sourced from the original manufacturer or authorized distributors?
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7.What is the process for return or replacement of SN74ABT16240DL?
All SN74ABT16240DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16240DL, 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 SN74ABT16240DL part is unused and in its original packaging.
Return procedure for SN74ABT16240DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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