CD4521BE Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments CD4521BE is a CMOS 24-stage frequency divider with supply range 3 V to 18 V, 50 pF load capability, and 7 tapped output stages in a 16-pin PDIP. From $0.60 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD4521BE Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2337(MOQ 316)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide supply voltage from 3 V to 18 V enabling use in 5 V TTL, 9 V battery, and 12 V industrial systems
- 24-stage binary counter with outputs from the last 7 stages for flexible frequency division ratios
- 50 pF load capacitance tolerance and CMOS logic compatibility for low-power clocking circuits
Applications
CD4521BE is commonly used as a programmable frequency divider in clocks, timers, and oscillator prescaler circuits requiring a wide supply range. Its 7 accessible output stages allow selectable division ratios from 2^17 to 2^24, suiting long-interval timing in industrial controllers and medical alarm systems. The 16-pin DIP form factor enables rapid prototyping and through-hole production without special tooling.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | OUTPUTS FROM LAST 7 STAGES AVAILABLE |
| Count Direction | UP |
| Family | 4000/14000/40000 |
| JESD-30 Code | R-PDIP-T16 |
| 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 | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| 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 | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | NEGATIVE EDGE |
| fmax-Min | 6.5MHz |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia, Mexico |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What division ratios are accessible on CD4521BE and which stages provide outputs?
CD4521BE is a 24-stage ripple-carry binary counter, with the last 7 stages providing tap outputs corresponding to division ratios of 2^17 through 2^24, ranging from 131072 to 16777216. This enables very long timing intervals from a standard crystal oscillator input at frequencies up to several megahertz.
Can CD4521BE operate in both 5 V microcontroller and 12 V industrial systems on the same design?
Yes, CD4521BE supports a supply voltage range of 3 V to 18 V, making it directly compatible with 5 V CMOS logic and 12 V industrial power rails. Output levels track the supply, so no level-shifting is required when interfacing to both 5 V microcontrollers and 12 V relay drivers in mixed-voltage industrial panels.
How does the load capacitance specification of CD4521BE affect oscillator circuit design?
The device is rated for 50 pF load capacitance on its outputs, which sets the maximum PCB trace and input capacitance budget. Exceeding 50 pF increases propagation delay and reduces maximum clock frequency. For high-speed prescaler designs above 1 MHz, keeping trace length under 10 cm and using buffer stages is recommended to stay within the 50 pF limit.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 316+ | $0.9500 | $300.20 |
| 745+ | $0.2696 | $200.85 |
| 960+ | $0.2606 | $250.18 |
| 1285+ | $0.2337 | $300.30 |
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