M74HC4520B1R STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
The M74HC4520B1R is a dual 4-bit binary up-counter in the HC CMOS logic family, featuring gated clock inputs and Schmitt trigger clock inputs for noise-immune counting. It operates from 2 V to 6 V in a 16-pin DIP package for digital counting and timing circuits.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- M74HC4520B1R 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 M74HC4520B1R?
- Dual 4-bit binary up-counter with independent enable and clock inputs
- Schmitt trigger on clock input for reliable counting in noisy environments
- Gated clock architecture supports synchronous enable/disable without glitches
- HC CMOS family operating from 2 V to 6 V supply
- 50 pF load capacitance specification for standard logic bus compatibility
- 16-pin DIP package for breadboard prototyping and through-hole assembly
What is M74HC4520B1R used for?
The M74HC4520B1R is used in frequency division, event counting, and digital timing circuits in industrial equipment, educational electronics, and embedded control systems. Its dual independent counter structure and Schmitt trigger inputs make it well suited for debounce-free button event counters, clock dividers, and sequencing circuits in 5 V logic designs.
What are the specifications of M74HC4520B1R?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | GATED CLOCK; SCHMITT TRIGGER ON CLOCK INPUT |
| Count Direction | UP |
| Family | HC/UH |
| 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 | 20000000Hz |
| Max I(ol) | 0.004A |
| 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 |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 50mA |
| Prop. Delay@Nom-Sup | 48ns |
| Propagation Delay (tpd) | 240ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 24MHz |
| 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 M74HC4520B1R datasheet?
M74HC4520B1R Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for M74HC4520B1R?
Compatible alternatives and drop-in replacements for M74HC4520B1R:
Counter, HC/UH Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, CMOS, PDIP16
Seven Segment Decoder/Driver, HC/UH Series, Configurable Output, CMOS, PDIP16
Frequently Asked Questions
How does the Schmitt trigger clock input on M74HC4520B1R improve counting reliability in noisy industrial environments?
The Schmitt trigger clock input provides hysteresis, typically around 0.9 V at 5 V supply, so slow-rising or noisy clock signals do not cause false counts, making the M74HC4520B1R reliable in motor drive and relay-switching environments.
Can the two 4-bit counters in M74HC4520B1R be cascaded to form an 8-bit counter?
Yes. The carry output of the first 4-bit counter can drive the clock input of the second counter on the same device, creating an 8-bit binary counter that counts up to 255 pulses before overflowing.
Is M74HC4520B1R in a through-hole DIP package suitable for prototype testing before migrating to an SMT design?
The 16-pin DIP package allows direct breadboard insertion for rapid prototyping and functional verification. Designers can later migrate to the SOIC or TSSOP SMT variants of the HC4520 family without changing logic design.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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