CY74FCT821ATQCTG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CY74FCT821ATQCTG4 is a 10-bit tri-state bus interface flip-flop from the FCT logic family, featuring active-low enable control and 71.4MHz maximum operating frequency. It supports unidirectional bus driving with 50pF load capacitance in a 24-pin SOIC package. Available in stock worldwide for high-speed digital bus interface and data storage applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- CY74FCT821ATQCTG4 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 CY74FCT821ATQCTG4?
- 10-bit tri-state flip-flop with active-low output enable for reliable bus isolation and multi-master bus architectures
- FCT-family high-speed operation up to 71.4MHz maximum frequency with 50pF load capacitance for fast data throughput
- 24-pin SOIC (R-PDSO-G24) package with RoHS e4 lead-free compliance for modern PCB assembly
- Unidirectional bus driver with registered outputs enabling clean data latching and bus-to-bus data transfer
What is CY74FCT821ATQCTG4 used for?
The CY74FCT821ATQCTG4 is commonly used in microprocessor and DSP bus interface circuits where 10 bits of registered data need to be transferred between bus segments with tri-state control. Its 71.4MHz operational speed makes it well-suited for high-speed memory interfaces, FPGA I/O expansion, and data buffering in industrial control systems. The tri-state output capability allows multiple devices to share a common bus without signal contention.
What are the specifications of CY74FCT821ATQCTG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | FCT |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max Frequency@Nom-Sup | 71400000Hz |
| Max I(ol) | 0.064A |
| Number of Bits | 10 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP24,.24 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 12.2mA |
| Prop. Delay@Nom-Sup | 10ns |
| Propagation Delay (tpd) | 20ns |
| 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 Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.635mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| HTS Code | 8542.39.00.60 |
Where can I find the CY74FCT821ATQCTG4 datasheet?
CY74FCT821ATQCTG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CY74FCT821ATQCTG4?
Compatible alternatives and drop-in replacements for CY74FCT821ATQCTG4:
Frequently Asked Questions
What is the maximum operating frequency of the CY74FCT821ATQCTG4?
The CY74FCT821ATQCTG4 supports a maximum operating frequency of 71.4MHz (71,400,000 Hz) at nominal supply voltage. This FCT-family speed makes it suitable for high-speed bus interface applications in processors, FPGAs, and memory controllers where fast data registered transfers are required.
What does the tri-state output feature mean for bus applications?
The tri-state outputs of the CY74FCT821ATQCTG4 can be placed in a high-impedance state via the active-low output enable pin, effectively disconnecting the device from the bus. This allows multiple flip-flop devices to share a common data bus without signal contention, which is essential in multi-master bus architectures with 50pF load capacitance specification.
How many bits does the CY74FCT821ATQCTG4 handle?
The CY74FCT821ATQCTG4 handles 10 bits simultaneously, making it suitable for interfacing with 10-bit data or address buses. This is especially useful in applications requiring byte-plus-parity (9-bit) or custom 10-bit bus widths. The 24-pin SOIC package accommodates the 10 data inputs, 10 outputs, plus control pins.
What logic family is CY74FCT821ATQCTG4 and what is its supply voltage?
The CY74FCT821ATQCTG4 belongs to the FCT (Fast CMOS Technology) logic family, which combines CMOS low-power consumption with TTL-compatible input and output levels. FCT devices typically operate from a 5V supply and are pin and function compatible with standard 74FCT series logic, offering straightforward replacement for older TTL designs.
Is the CY74FCT821ATQCTG4 RoHS compliant and what package does it use?
Yes, the CY74FCT821ATQCTG4 is fully RoHS compliant with JESD-609 e4 lead-free status, confirmed by the 'G4' suffix. It comes in a 24-pin small outline (SOIC) package with JESD-30 code R-PDSO-G24, suitable for surface-mount PCB assembly in commercial and industrial temperature range applications.
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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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