SN74ABT126DRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74ABT126DRE4 is a 4-channel non-inverting 3-state BiCMOS bus buffer driver with active-high enable, operating at 5V with 50pF load capacitance rating, housed in a 14-pin SOIC package for high-speed digital bus interfacing.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ABT126DRE4 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
Key Features
- 4-channel non-inverting 3-state outputs for clean bus isolation with active-high enable control
- BiCMOS technology combining CMOS low power with TTL drive strength for 64 mA output current
- ABT family guarantees typical output low pulse below 1V at 5V VCC for TTL compatibility
- 14-pin SOIC with 50 pF rated load capacitance enabling reliable operation on high-capacitance PCB buses
Applications
The SN74ABT126DRE4 is used in microprocessor data bus buffering, memory interface expansion, and FPGA I/O bridging where unidirectional 3-state bus isolation is needed at 5V logic levels. Its BiCMOS ABT output stage delivers sufficient drive current for high-capacitance backplane buses and multi-drop topologies in industrial control and communications equipment.
Specifications
| YTEOL | 0 |
| Additional Feature | TYP VOLP < 1V @ VCC = 5V, TA = 25 DEG C |
| Control Type | ENABLE HIGH |
| Count Direction | UNIDIRECTIONAL |
| Family | ABT |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.064A |
| Number of Bits | 1 |
| Number of Functions | 4 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 30mA |
| Prop. Delay@Nom-Sup | 6.3ns |
| Propagation Delay (tpd) | 6.3ns |
| 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 | 1.27mm |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74ABT126DRE4:
Frequently Asked Questions
What output current can the SN74ABT126DRE4 sink or source on each channel?
The SN74ABT126DRE4 provides a maximum output low current (IOL) of 64 mA per channel, which is well above standard TTL thresholds. This generous drive capability allows it to reliably switch 50 pF loaded bus lines at high speed without violating VOL specifications at 5 V VCC.
How does the 3-state enable function of the SN74ABT126DRE4 support bus sharing architectures?
Each output enters a high-impedance 3-state condition when the active-high OE pin is de-asserted low, electrically isolating that channel from the bus. This allows multiple SN74ABT126DRE4 devices to share a common 5 V data bus without contention, supporting up to 4 separate bus masters in daisy-chain architectures.
In which digital logic families is the SN74ABT126DRE4 pin-compatible for direct substitution?
The SN74ABT126DRE4 belongs to the ABT family and is pin-compatible with 74AC and 74ACT bus buffer equivalents in the 14-pin SOIC footprint. Its BiCMOS output stage is TTL-voltage compatible, meaning it interoperates with 5 V CMOS and TTL logic without level-shifting when supply voltage is 4.5 V to 5.5 V.
Which PCB assembly formats does the 14-pin SOIC T/R packaging of the SN74ABT126DRE4 support?
The SOIC T/R (tape-and-reel) packaging of the SN74ABT126DRE4 is designed for automated SMT pick-and-place assembly. The 14-pin SOIC body measures 8.65 mm × 3.9 mm with 1.27 mm pin pitch, compatible with standard reflow soldering and suitable for high-volume PCB production lines.
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