CD74AC112E Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74AC112E is a dual JK-type flip-flop in the advanced CMOS AC family, clocking at up to 71 MHz from a 1.5 V to 5.5 V supply with 24 mA output drive in a 16-pin PDIP package.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD74AC112E Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 71 MHz maximum clock frequency in AC CMOS technology, significantly faster than HC-family JK flip-flops at the same supply
- Wide supply range of 1.5 V to 5.5 V enables mixed-voltage system designs from 1.8 V through 5 V logic rails
- 24 mA output sink current in 16-pin PDIP for direct drive of multiple TTL or CMOS loads without buffer stages
Applications
CD74AC112E is used in high-speed digital frequency dividers, synchronous state machines, and edge-triggered latching circuits operating at clock frequencies up to 71 MHz. Its 1.5 V to 5.5 V supply range makes it compatible with both legacy 5 V TTL-level systems and modern 1.8 V or 3.3 V microprocessor I/O, bridging voltage domains in mixed-signal boards. The 16-pin DIP package is commonly chosen for university laboratory prototyping and industrial PLC I/O cards where through-hole assembly and easy socketing are preferred.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | AC |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | J-K FLIP-FLOP |
| Max Frequency@Nom-Sup | 71000000Hz |
| Max I(ol) | 0.024A |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 11.1ns |
| Propagation Delay (tpd) | 129ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | NEGATIVE EDGE |
| fmax-Min | 100MHz |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia, Mexico |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does CD74AC112E's 71 MHz clock frequency compare to HC-family JK flip-flops in a high-speed prescaler design?
CD74AC112E in the AC CMOS family achieves 71 MHz maximum clock rate versus approximately 20 MHz for HC-family equivalents such as CD74HC107 at the same 5 V supply and 50 pF load. This 3.5× speed advantage allows CD74AC112E to divide frequencies above 50 MHz in RF prescaler and clock distribution circuits, covering the 24 mA output current needed to drive cascaded flip-flop stages directly without additional line buffers.
Can CD74AC112E interface directly with 3.3 V microcontroller outputs while powered from a 5 V rail?
Yes, CD74AC112E accepts input voltages from 0 V up to VCC on its J, K, and CLK pins. When powered at 5 V, the AC-family input threshold is approximately 1.5 V for logic low and 3.5 V for logic high, so a 3.3 V CMOS microcontroller output driving a high of 3.3 V is safely interpreted as logic high. This eliminates the need for level-shift resistors in mixed 3.3 V / 5 V designs, saving BOM cost across 2-element JK flip-flop logic stages.
For a through-hole board requiring socketed logic replacement, why is the 16-pin PDIP of CD74AC112E advantageous over SOIC?
The 16-pin PDIP of CD74AC112E fits standard 0.6-inch IC sockets with 2.54 mm pin pitch, allowing field replacement of the dual JK flip-flop without soldering in industrial equipment with long service lifetimes. SOIC packages require hot-air rework stations to unsolder, which is impractical for field technicians. At 1.5 V to 5.5 V supply and 71 MHz, the socketed PDIP version provides identical electrical performance to surface-mount alternatives while simplifying maintenance on relay logic and PLC motherboards.
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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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