CD4520BMN Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments CD4520BMN is a dual synchronous 4-bit binary up counter from the CMOS 4000 family with gated clock inputs and Schmitt trigger clock conditioning for noise immunity. Each counter section provides synchronous parallel counting with load/preset capability and drives a 50 pF load in a 16-pin DIP package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD4520BMN Datasheet PDF
- Category
- Integrated Circuit
- 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 CD4520BMN?
- Dual independent 4-bit synchronous up counters allowing cascade to 8-bit or wider count ranges with a single device
- Schmitt trigger clock input providing hysteresis that suppresses slow-edge or noisy clock glitches for robust counting
- Gated clock enable and load/preset inputs giving flexible counter control in frequency-divider and timer circuits
What is CD4520BMN used for?
The CD4520BMN is used in frequency division, event counting, and timer circuits in industrial control, consumer electronics, and educational laboratory applications where CMOS logic level compatibility across 3 V to 15 V supplies is required. Its dual-counter architecture enables cascaded 8-bit counting or two independent timing channels in a single 16-pin DIP package, making it a cost-effective choice for clock dividers, decade counters, and multi-channel pulse-width control circuits.
What are the specifications of CD4520BMN?
| Reach Compliance Code | Unknown |
| YTEOL | 0 |
| Additional Feature | GATED CLOCK; SCHMITT TRIGGER ON CLOCK INPUT |
| Count Direction | UP |
| Family | 4000/14000/40000 |
| JESD-30 Code | R-PDIP-T16 |
| Load Capacitance (CL) | 50pF |
| Load/Preset Input | YES |
| Logic IC Type | BINARY COUNTER |
| Mode of Operation | SYNCHRONOUS |
| Number of Bits | 4 |
| Number of Functions | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Propagation Delay (tpd) | 650ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 15V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 1.5MHz |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the CD4520BMN datasheet?
CD4520BMN Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD4520BMN?
Compatible alternatives and drop-in replacements for CD4520BMN:
Binary Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, PDSO16
Binary Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, PDSO16
Binary Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, PDSO16
Binary Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, PDSO16
Binary Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, CDIP16
Binary Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, PDIP16
Binary Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, CDIP16
Binary Counter, 4000/14000/40000 Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, PDIP16
Frequently Asked Questions
How can two CD4520BMN sections be cascaded to form an 8-bit counter for a wider counting range?
Each of the 2 independent 4-bit counters in the CD4520BMN has a carry output (CO) that goes high when the counter reaches its maximum count of 15 (binary 1111). Connecting the CO of the first counter to the clock enable input of the second creates a ripple-free synchronous 8-bit chain counting from 0 to 255, suitable for generating timing intervals up to 256 clock cycles in frequency-divider and event-count applications.
What advantage does the Schmitt trigger clock input of the CD4520BMN provide in electrically noisy environments?
The Schmitt trigger on the clock input provides approximately 0.5 V to 1.5 V of hysteresis (depending on supply voltage), preventing false triggering from slow edges or high-frequency noise superimposed on the clock line. In industrial environments with relay switching transients or motor-drive interference, this hysteresis ensures the counter increments exactly once per intended clock edge even when the signal rise time exceeds 1 µs.
Over what supply voltage range does the CD4520BMN operate, and how does that affect interfacing to both 5 V TTL and 12 V CMOS systems?
The CD4520BMN CMOS 4000-family device operates from 3 V to 15 V VDD. At 5 V it is directly compatible with LSTTL logic when the TTL outputs are pulled up to 5 V; at 10 V to 12 V it interfaces with industrial CMOS systems and mechanical relay drivers without a level-translation stage. Propagation delay decreases from approximately 200 ns at 5 V to about 60 ns at 10 V, so higher supply voltages improve counting speed.
For a frequency divider application, what is the maximum input clock frequency the CD4520BMN can reliably count?
At a 10 V supply the CD4520BMN maximum clock frequency is typically 8 MHz, while at 5 V it drops to approximately 3 MHz due to the slower CMOS switching at lower VDD. A divide-by-16 counter using both 4-bit sections at 10 V produces an output frequency up to 500 kHz, which covers audio-band clock dividers, CNC stepper motor pulse generators, and industrial process timing circuits.
Related Guides
BQ76942PFBR Battery Monitor Selection and Procurement Guide
Choose BQ76942PFBR by cell count, protection architecture, factory configuration, measurement needs, and a controlled sourcing specification.
Nov 13, 2026
SEP0640Q38CB Surge Protection Board Validation Guide
Validate a SEP0640Q38CB protection network through operating-envelope review, surge-current routing, recovery tests, and assembly checks.
Nov 13, 2026
BQ76942PFBR Battery Monitor Board Validation Guide
Validate BQ76942PFBR cell sensing, current measurement, protection switching, and configuration before releasing a battery-monitor board.
Nov 12, 2026
ECA1JHG220 Power-Rail Filter Design and Validation
Validate a 22 µF, 63 V ECA1JHG220 power-rail filter with droop calculations, startup measurements, ripple checks, and thermal tests.
Nov 11, 2026
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
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit