CD54HC191F3A Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The CD54HC191F3A is a high-speed CMOS presettable synchronous 4-bit binary up/down counter from Texas Instruments with ripple carry output and bidirectional counting. It supports parallel preset loading, operates with 50pF load capacitance, and is housed in a 16-pin ceramic DIP package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD54HC191F3A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $24.3160(MOQ 1)
- 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 CD54HC191F3A?
- Bidirectional 4-bit synchronous binary counting with up/down control enables versatile count sequencing in digital systems
- Presettable parallel load input allows initialization to any 4-bit value for flexible sequencing and timing applications
- Ripple Carry Output (RCO) facilitates cascading multiple devices for wider counting ranges without additional glue logic
- Ceramic 16-pin DIP package provides hermetic reliability for military, aerospace, and harsh-environment applications
What is CD54HC191F3A used for?
The CD54HC191F3A is used in digital frequency dividers, event counters, and timing circuits in industrial automation and control systems. Its presettable synchronous operation and ripple carry output make it ideal for cascaded multi-stage counters in signal generators, programmable dividers, and digital clocks. The military-grade ceramic package suits high-reliability applications in aerospace instrumentation, defense electronics, and harsh industrial environments requiring guaranteed long-term component availability.
What are the specifications of CD54HC191F3A?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | RCO OUTPUT |
| Count Direction | BIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Load/Preset Input | YES |
| Logic IC Type | BINARY COUNTER |
| Max Frequency@Nom-Sup | 20000000Hz |
| Max I(ol) | 0.0052A |
| Mode of Operation | SYNCHRONOUS |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Package Body Material | CERAMIC, GLASS-SEALED |
| 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 | 37ns |
| Propagation Delay (tpd) | 255ns |
| Qualification Status | Not Qualified |
| Screening Level | 38535Q/M;38534H;883B |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 23MHz |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the CD54HC191F3A datasheet?
CD54HC191F3A Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD54HC191F3A?
Compatible alternatives and drop-in replacements for CD54HC191F3A:
Counter, HC/UH Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, CMOS, PDIP16
Frequently Asked Questions
What counting direction does the CD54HC191F3A support?
The CD54HC191F3A supports bidirectional counting, allowing both up and down count sequences controlled by a single direction input pin. This flexibility makes it suitable for applications such as position tracking, frequency synthesis, and reversible event counting in control systems.
What is the presettable load feature of the CD54HC191F3A?
The CD54HC191F3A includes a parallel preset (load) input that allows the counter to be asynchronously loaded with any 4-bit value. This feature enables programmable starting points for counting sequences, simplifying the design of programmable dividers and custom timing circuits.
What is the Ripple Carry Output (RCO) on the CD54HC191F3A used for?
The Ripple Carry Output (RCO) is used to cascade multiple CD54HC191F3A devices to create counters wider than 4 bits. When the counter reaches its terminal count, RCO goes active, enabling the next stage to clock, allowing seamless extension to 8-bit, 12-bit, or larger counter configurations.
What package is the CD54HC191F3A available in?
The CD54HC191F3A is housed in a 16-pin Ceramic Dual-In-Line Package (GDIP-T16), which provides hermetic sealing for superior environmental protection. This ceramic package is preferred for military and aerospace applications where long-term reliability under temperature extremes is required.
How long will the CD54HC191F3A remain in production?
The CD54HC191F3A has a projected YTEOL (Years To End Of Life) of 15 years, ensuring long-term supply continuity from Texas Instruments. This extended availability is particularly valuable for defense, aerospace, and industrial designs that require consistent component sourcing over multi-decade product lifetimes.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $24.3160 | $24.32 |
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