SN74S51DRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Dual 2-wide 2-input AND-OR-Invert gate IC in 14-pin SOIC package, featuring one function with an additional 6-input configuration for complex combinational logic. Operates at 5 V with 20 mA output sink current and 15 pF load capacitance for high-speed TTL-S designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN74S51DRE4 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
- Dual AND-OR-Invert function with one gate offering a 6-input extended configuration for complex sum-of-products logic in a single 14-pin package
- Schottky TTL (S-family) technology delivering fast propagation delays and 20 mA output sink current for driving TTL-compatible bus lines
- Compact 14-pin SOIC package with 15 pF load capacitance enabling high-speed combinational logic without additional inverter stages
Applications
SN74S51DRE4 is used in high-speed combinational logic circuits implementing sum-of-products Boolean expressions directly in hardware, reducing gate count and propagation delay. Its AND-OR-Invert structure is particularly valuable in address decoding, priority encoder output stages, and ALU carry-generate logic in discrete TTL-based digital designs. The 5 V Schottky TTL family compatibility makes it interchangeable with other S-series devices on standard 5 V logic boards.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | ANOTHER FUNCTION HAS 6 INPUT |
| Family | S |
| JESD-30 Code | R-PDSO-G14 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | AND-OR-INVERT GATE |
| Max I(ol) | 0.02A |
| Number of Functions | 2 |
| Number of Inputs | 4 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 22mA |
| Prop. Delay@Nom-Sup | 5.5ns |
| Propagation Delay (tpd) | 5.5ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74S51DRE4:
Frequently Asked Questions
What logic function does SN74S51DRE4 implement, and how does its 6-input gate help reduce component count?
SN74S51DRE4 implements a dual 2-wide 2-input AND-OR-Invert function, with one gate offering a 6-input configuration. This allows a single 14-pin SOIC device to implement a 3-term sum-of-products expression with inversion, replacing up to 3 separate AND gates plus an OR gate and inverter, saving board space and reducing signal propagation through 15 pF load paths.
What output drive capability does SN74S51DRE4 provide, and how many TTL loads can it sink?
SN74S51DRE4 sinks up to 20 mA output low current, which equals approximately 10 standard TTL unit loads at 2 mA each. This makes it suitable for driving medium-fanout bus nodes on 5 V logic boards, and the Schottky clamp diodes in the S-family minimize storage time, maintaining fast switching even at maximum 20 mA sink load.
In which address decoding scenarios is SN74S51DRE4 preferred over a standard NAND gate array?
SN74S51DRE4 is preferred for address decoding when two product terms must be OR-inverted in a single stage, such as selecting two non-contiguous memory regions on a 5 V address bus. The AND-OR-Invert structure reduces propagation delay by 1 to 2 gate stages compared to implementing the same function with 74S00 NAND gates, and the 15 pF load capacitance spec suits standard PCB trace lengths in backplane designs.
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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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