CY74FCT191CTSOCTG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CY74FCT191CTSOCTG4 is a presettable synchronous 4-bit up/down binary counter operating at up to 125 MHz with TCO terminal count output and parallel load capability. Drives 50 pF loads with fast FCT logic levels on 5V supply in a 16-pin SOIC package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CY74FCT191CTSOCTG4 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
What are the key features of CY74FCT191CTSOCTG4?
- Synchronous 4-bit up/down binary counting to 125 MHz enables high-speed frequency division and event counting in digital systems
- Parallel load (preset) input allows immediate loading of any 4-bit value for flexible starting count initialization without resetting the chain
- TCO (Terminal Count Output) facilitates easy cascading of multiple counters to build 8-bit, 12-bit, or wider counter chains
- FCT logic family delivers fast propagation delays with standard 5V TTL-compatible inputs and outputs on 16-pin SOIC package
What is CY74FCT191CTSOCTG4 used for?
The CY74FCT191CTSOCTG4 is used in digital timing and sequencing circuits such as frequency dividers, event counters, and pulse generators in test and measurement equipment operating at up to 125 MHz. Its bidirectional counting and parallel load capability make it suitable for position tracking in motion control systems and address generation in FIFO buffer management. Legacy FPGA-free logic designs and bus interface circuits also rely on this counter for real-time modulo counting and hardware state machine implementations.
What are the specifications of CY74FCT191CTSOCTG4?
| Pbfree Code | No |
| YTEOL | 0 |
| Additional Feature | TCO OUTPUT |
| Count Direction | BIDIRECTIONAL |
| Family | FCT |
| JESD-30 Code | R-PDSO-G16 |
| Load Capacitance (CL) | 50pF |
| Load/Preset Input | YES |
| Logic IC Type | BINARY COUNTER |
| Max Frequency@Nom-Sup | 125000000Hz |
| Max I(ol) | 0.064A |
| Mode of Operation | SYNCHRONOUS |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Output Characteristics | 3-STATE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 0.2mA |
| Prop. Delay@Nom-Sup | 6.2ns |
| Propagation Delay (tpd) | 6.2ns |
| 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 | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 125MHz |
| ## CY74FCT191CTSOCTG4 Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the CY74FCT191CTSOCTG4 datasheet?
CY74FCT191CTSOCTG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CY74FCT191CTSOCTG4?
Compatible alternatives and drop-in replacements for CY74FCT191CTSOCTG4:
suggested
suggested
suggested
suggested
Binary Counter, FCT Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, CMOS, PDSO16
Frequently Asked Questions
Which designs can use CY74FCT191CTSOCTG4 when 16 pins is a required parameter?
CY74FCT191CTSOCTG4 is a practical fit when the design needs 16 pins in a integrated circuit from Texas Instruments. Buyers should confirm the package, lifecycle state, and original datasheet before approving it for production builds.
How should buyers compare CY74FCT191CTSOCTG4 with alternate integrated circuit options?
Use -40°C to 85°C as one verified requirement, then match the electrical ratings, footprint, and manufacturer series against the target BOM. This reduces substitution risk when similar parts differ in assembly or operating limits.
Which assembly detail should be checked before sourcing CY74FCT191CTSOCTG4 for production?
Confirm that the selected lot matches SOIC and the known 4-bit requirement before RFQ approval. This gives incoming inspection and engineering teams a clearer basis for footprint, mating, or thermal review.
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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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