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
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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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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.
| 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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