74ABT16540ADGVRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments 74ABT16540ADGVRE4 is a 16-bit octal buffer and line driver with 3-state outputs and dual active-low output-enable controls in a 48-pin SSOP package, providing high-speed ABT-family bus driving for 5 V and 3.3 V mixed-supply systems.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 48
- Lifecycle
- OBSOLETE
- Datasheet
- 74ABT16540ADGVRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 74ABT16540ADGVRE4?
- 16-bit (2x8) 3-state buffer/driver in ABT family supporting 5 V tolerant inputs for mixed 3.3 V and 5 V bus interfacing
- Dual independent active-low output enable pins allowing byte-wide half-bus control without external gating logic
- High-drive outputs specified at 50 pF load capacitance and propagation delay under 4 ns for fast backplane and memory bus applications
- 48-pin SSOP (R-PDSO-G48) RoHS-compliant E4 package with 0.635 mm pitch for dense multi-bus digital board designs
What is 74ABT16540ADGVRE4 used for?
74ABT16540ADGVRE4 is used in memory bus interfaces, CPU address/data bus buffers, and FPGA I/O expansion circuits where high-drive 3-state line drivers must isolate or extend a 16-bit parallel bus. Its dual output-enable architecture allows a processor to manage upper and lower data bytes independently, which is essential in 8-bit boot-mode and 16-bit operating-mode switchable memory systems. The ABT-family output drive strength and sub-4 ns propagation delay make it appropriate for PCIe adapter boards, industrial backplanes, and test equipment requiring fast, clean bus transitions at 50 pF load.
What are the specifications of 74ABT16540ADGVRE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | WITH DUAL OUTPUT ENABLE |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | ABT |
| JESD-30 Code | R-PDSO-G48 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.064A |
| Number of Bits | 8 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP48,.25,16 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 34mA |
| Prop. Delay@Nom-Sup | 4.3ns |
| Propagation Delay (tpd) | 4.3ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.4mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Where can I find the 74ABT16540ADGVRE4 datasheet?
74ABT16540ADGVRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 74ABT16540ADGVRE4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many independent output-enable controls does 74ABT16540ADGVRE4 provide, and how does this simplify 16-bit bus byte-lane management?
74ABT16540ADGVRE4 has 2 independent active-low output-enable pins (OE1 and OE2), each controlling one 8-bit byte lane of the 16-bit output bus. This lets a processor assert only the lower byte lane during 8-bit boot operations and both lanes during 16-bit normal operation, eliminating external AND gates or additional 74xxx ICs that would otherwise be needed to decode byte-enable signals.
What is the propagation delay of 74ABT16540ADGVRE4 at 50 pF load, and is this fast enough for a 33 MHz ISA or memory bus?
At 50 pF load capacitance, 74ABT16540ADGVRE4 ABT-family propagation delay is typically under 4 ns, well below the 30 ns bus cycle setup requirement of a 33 MHz ISA-class bus. Even at the worst-case 25 °C production corner, the delay stays under 6 ns, leaving over 20 ns of margin for PCB trace delay and receiving-device setup time on a standard FR-4 board.
Can 74ABT16540ADGVRE4 accept 5 V input signals when driven from a 3.3 V supply, making it suitable for mixed-voltage bus interfacing?
Yes, ABT-family devices like 74ABT16540ADGVRE4 feature 5 V-tolerant inputs when operated from a 3.3 V supply, accepting logic-high inputs up to 5.5 V without exceeding device ratings. This makes the part a direct interface bridge between legacy 5 V processors or FPGAs and newer 3.3 V bus agents, avoiding the level-translation circuitry otherwise required for 5 V-to-3.3 V bus connections.
For a 16-bit SRAM address buffer on an embedded CPU board, how does the 48-pin SSOP package of 74ABT16540ADGVRE4 affect PCB routing density?
The 48-pin SSOP with 0.635 mm pitch occupies approximately 15 mm x 7 mm, providing 16 data lines plus control pins in a footprint roughly 40 % smaller than an equivalent 48-pin SOIC package. On a 4-layer PCB, all 16 output traces can escape the SSOP in 2 routing layers without vias, enabling a clean fanout to a parallel SRAM in under 30 mm of total trace length.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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