SN74S112ADRE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74S112ADRE4 is a dual J-K flip-flop logic IC from the Schottky 74S family with a maximum clock frequency of 80 MHz. It integrates 2 independent flip-flop functions with preset and clear in a 16-pin SOIC package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74S112ADRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74S112ADRE4?
- Dual J-K flip-flops with independent preset and clear inputs for flexible synchronous and asynchronous control
- 80 MHz maximum clock frequency in the high-speed Schottky 74S logic family
- 16-pin SOIC package with 15 pF load capacitance rating enables reliable timing in dense digital designs
What is SN74S112ADRE4 used for?
The SN74S112ADRE4 is used in frequency divider and counter circuits where its 80 MHz operation handles fast clock signals in digital communication and signal processing boards. Its independent J-K inputs allow toggle, set, and reset modes, making it suitable for state machine implementations and synchronous register elements in FPGA companion logic. It also appears in legacy industrial control and test equipment designs that maintain 74S TTL logic compatibility for high-speed sequential logic stages.
What are the specifications of SN74S112ADRE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Family | S |
| JESD-30 Code | R-PDSO-G16 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | J-K FLIP-FLOP |
| Max Frequency@Nom-Sup | 80000000Hz |
| Max I(ol) | 0.02A |
| Number of Bits | 2 |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 25mA |
| Prop. Delay@Nom-Sup | 7ns |
| Propagation Delay (tpd) | 7ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Trigger Type | NEGATIVE EDGE |
| fmax-Min | 80MHz |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74S112ADRE4 datasheet?
SN74S112ADRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74S112ADRE4?
Compatible alternatives and drop-in replacements for SN74S112ADRE4:
Flip-Flop, S Series, 2-Func, Negative Edge Triggered, 2-Bit, Complementary Output, TTL, PDSO16
J-K Flip-Flop, S Series, 2-Func, Negative Edge Triggered, 2-Bit, Complementary Output, TTL, PDSO16
J-K Flip-Flop, S Series, 2-Func, Negative Edge Triggered, 2-Bit, Complementary Output, TTL, PDSO16
Frequently Asked Questions
What is the maximum operating frequency of SN74S112ADRE4 and which logic family does it belong to?
The SN74S112ADRE4 belongs to the 74S Schottky TTL family and operates at up to 80 MHz clock frequency, making it significantly faster than standard 74LS parts. This speed is achieved through Schottky diode clamping, which prevents transistor saturation and reduces propagation delay to approximately 7 ns typical.
How do the preset and clear inputs on SN74S112ADRE4 assist in circuit initialization?
The active-low preset and clear inputs allow each flip-flop to be forced to a known state asynchronously, independent of the clock. At power-up, a brief low pulse on clear sets both outputs to a defined logic 0 state, preventing metastability in the downstream logic. This is essential in counter chains and state machines where an undefined starting state can cause unpredictable 80 MHz operation.
When would a designer choose SN74S112ADRE4 over a 74HCT112 in a legacy board redesign?
The 74S family operates from a 5 V TTL supply and provides 80 MHz speed, while 74HCT112 is limited to roughly 25 MHz at 5 V. If the board already uses Schottky TTL parts and needs to maintain timing margins in a 50 MHz to 80 MHz clock domain without redesigning the power supply, the SN74S112ADRE4 is the drop-in choice. For a low-power redesign on 3.3 V, the 74HCT or 74AHC family would be preferred instead.
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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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