CD74AC109EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The CD74AC109EE4 is a dual positive-edge-triggered JK flip-flop logic IC from Texas Instruments in the AC high-speed CMOS family, housed in a 16-pin PDIP package. It features complementary Q and Q-bar outputs with a 50 pF load capacitance rating for reliable digital state storage. Available in tube packaging from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74AC109EE4 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
What are the key features of CD74AC109EE4?
- Dual JK flip-flop with complementary Q and Q-bar outputs enabling versatile toggle, set, and hold sequential logic in a single 16-pin PDIP IC
- AC CMOS family delivers faster propagation delays and higher drive current than standard 74HC series while maintaining CMOS-compatible input thresholds
- 50 pF rated load capacitance and positive-edge triggering support reliable clocked state machines in noise-immune digital designs
What is CD74AC109EE4 used for?
The CD74AC109EE4 is well-suited for digital state machine design, frequency divider circuits, and data synchronization logic in industrial controllers, embedded systems, and educational prototyping boards. Its dual JK flip-flop architecture with complementary outputs makes it a flexible building block for counters, shift registers, and clock-domain crossing buffers in 16-pin through-hole PDIP layouts.
What are the specifications of CD74AC109EE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Family | AC |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | J-KBAR FLIP-FLOP |
| 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 |
| Propagation Delay (tpd) | 129ns |
| Qualification Status | Not Qualified |
| 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 |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 100MHz |
| 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 CD74AC109EE4 datasheet?
CD74AC109EE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74AC109EE4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What logic family does the CD74AC109EE4 belong to and how does it compare in speed to 74HC equivalents?
The CD74AC109EE4 belongs to the AC (Advanced CMOS) logic family, which offers propagation delays typically below 10 ns—significantly faster than the 74HC series whose delays are commonly 15 ns to 25 ns. This speed advantage, combined with a 50 pF rated output load capacitance, makes it suitable for higher-frequency sequential logic circuits up to tens of MHz.
How can the dual JK flip-flop configuration of the CD74AC109EE4 be used to build a frequency divider?
By connecting the J and K inputs of each flip-flop to logic high (VCC) and feeding the clock signal to the CLK input, each JK flip-flop section of the CD74AC109EE4 operates in toggle mode, dividing the input clock frequency by 2 per stage. Cascading both sections in a 16-pin PDIP layout yields a divide-by-4 counter without any additional ICs.
What package does the CD74AC109EE4 use and what are the implications for prototyping and production?
The CD74AC109EE4 uses a 16-pin PDIP (plastic dual in-line) through-hole package with a standard 0.300-inch row spacing, making it directly breadboard-compatible for rapid prototyping. In production, PDIP packages require wave soldering rather than SMT reflow, which suits lower-volume runs and repair-friendly designs but increases board real estate compared to SOIC or TSSOP alternatives.
Is the CD74AC109EE4 RoHS-compliant and what does the JESD-609 e4 code indicate for procurement?
Yes, the CD74AC109EE4 is RoHS-compliant as indicated by its JESD-609 e4 code, which confirms lead-free construction. The 'E4' suffix in the part number also denotes a lead-free, RoHS-compliant variant shipped in tube packaging. Procurement teams sourcing this 16-pin AC flip-flop for European or Asian markets can use it directly without restriction under current RoHS directives.
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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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