CD4521BMT Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD4521BMT is a CMOS 24-stage binary frequency divider in 16-pin SOIC package with outputs from the last 7 stages. Supports up to 2 MHz input frequency with 50 pF load capacitance. Available from stock worldwide.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD4521BMT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5145(MOQ 10)
- 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 CD4521BMT?
- 24-stage binary frequency divider with outputs accessible from the last 7 stages enabling flexible clock division ratios
- Operates up to 2 MHz input frequency with 50 pF load capacitance in the 4000-series CMOS logic family
- 16-pin SOIC package from the CD4000 family with wide supply voltage range for robust timing circuit design
What is CD4521BMT used for?
The CD4521BMT is used in clock generation and frequency division circuits where a single input clock needs to be divided down to multiple lower frequencies simultaneously. It suits real-time clock circuits, timer applications, and long-duration timing generators in industrial and consumer electronics. The 24-stage divider with 7 accessible outputs is ideal for audio frequency generation, pulse counting, and programmable timer modules requiring binary frequency scaling.
What are the specifications of CD4521BMT?
| YTEOL | 0 |
| Additional Feature | OUTPUTS FROM LAST 7 STAGES AVAILABLE |
| Count Direction | UP |
| Family | 4000/14000/40000 |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Load/Preset Input | NO |
| Logic IC Type | BINARY COUNTER |
| Max Frequency@Nom-Sup | 2000000Hz |
| Max I(ol) | 0.0024A |
| Mode of Operation | ASYNCHRONOUS |
| Number of Bits | 24 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 3mA |
| Prop. Delay@Nom-Sup | 4500ns |
| Propagation Delay (tpd) | 12000ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 18V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Trigger Type | NEGATIVE EDGE |
| fmax-Min | 6.5MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mexico |
Where can I find the CD4521BMT datasheet?
CD4521BMT Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD4521BMT?
Compatible alternatives and drop-in replacements for CD4521BMT:
Binary Counter, 4000/14000/40000 Series, Asynchronous, Negative Edge Triggered, 24-Bit, Up Direction, CMOS, PDSO16
Binary Counter, 4000/14000/40000 Series, Asynchronous, Negative Edge Triggered, 24-Bit, Up Direction, CMOS, PDSO16
Binary Counter, 4000/14000/40000 Series, Asynchronous, Negative Edge Triggered, 24-Bit, Up Direction, CMOS, PDSO16
Frequently Asked Questions
How many stage outputs are accessible on CD4521BMT and what division ratios do they provide?
The CD4521BMT provides outputs from the last 7 of its 24 binary counter stages, giving division ratios of 2^18 through 2^24 from the input frequency. With a 2 MHz maximum input, the final stage output can produce frequencies as low as approximately 0.12 Hz, enabling very long timing periods in a single IC.
What input frequency and load conditions is CD4521BMT rated to handle reliably?
CD4521BMT supports a maximum input frequency of 2 MHz at nominal supply voltage with a 50 pF load capacitance on its outputs. It belongs to the CD4000-series CMOS family, operating across a wide voltage range, and its binary counter architecture maintains stable division across the full temperature range of -55°C to 125°C.
For which timer or clock divider circuit designs is CD4521BMT a practical single-chip solution?
CD4521BMT suits designs requiring long-duration time bases from a standard crystal oscillator, such as real-time clock dividers taking a 32.768 kHz crystal down to 1 Hz using its 2^15 stage output. The 16-pin SOIC package allows compact PCB integration, and the 7 accessible output taps provide simultaneous 8 different sub-frequency signals for audio oscillators, pulse generators, and industrial timers.
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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 |
|---|---|---|
| 10+ | $0.8110 | $8.11 |
| 25+ | $0.7332 | $18.33 |
| 100+ | $0.6475 | $64.75 |
| 1000+ | $0.5778 | $577.80 |
| 2500+ | $0.5416 | $1353.90 |
| 6250+ | $0.5145 | $3215.50 |
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