HEF4059BT,653

Counter Dividers Overview

The HEF4059BT,653 is a programmable divide-by-n counter in a 24-lead SO plastic package. It divides input frequency by any number n from 3 to 15,999 using 16 jam inputs and three mode select inputs. The output provides a one clock-cycle wide pulse with TTL drive capability. Schmitt-trigger action on the clock input ensures tolerance to slow rise/fall times. Maximum clock pulse frequency reaches 20 MHz at 15 V supply.

Counter Dividers Feature Summary

• Programmable division ratio via 16 BCD jam inputs and mode selection logic
• Single output with TTL drive capability producing one-clock-cycle pulses
• Schmitt-trigger clock input for enhanced noise immunity and slow signal handling
• Master preset and latch enable modes for controlled initialization and output holding

Counter Dividers Applications

• Frequency synthesizer channel separation circuits
• Programmable timer applications requiring precise division ratios
• Digital clock generation systems with variable modulus requirements

Counter Dividers Procurement Notes

Verify the complete part number including the trailing suffix against manufacturer documentation to ensure correct package type and temperature range compatibility. Confirm that the specific ordering code matches the required 24-lead SO plastic variant. Cross-reference datasheet revision dates to ensure alignment with current electrical specifications and pinout definitions before finalizing procurement orders.

Counter Dividers Selection Notes

Select this component when a fixed-ratio divider is insufficient and programmable division between 3 and 15,999 is required. Ensure the application supports the necessary voltage levels for the specified TTL drive capability. Verify that the maximum clock frequency of 20 MHz meets the system timing requirements. Consider the need for master preset functionality if deterministic startup states are critical for the design.

Counter Dividers Part Context

This device belongs to the HE4000B Logic Family, specifically categorized as an LSI (Large Scale Integration) programmable counter. It is manufactured under the Philips Semiconductors brand, now NXP USA Inc., utilizing LOCMOS technology. The HEF4059B series provides flexible counting configurations through selectable first section dividers, enabling complex frequency synthesis architectures within standard CMOS logic constraints.

Counter Dividers Replacement Considerations

Direct substitutes include other HEF4059B variants with different package options such as HEF4059BP(N) for DIL plastic or HEF4059BD(F) for DIL ceramic. Ensure functional equivalence regarding the 24-lead pinout and electrical characteristics when swapping package types. Verify that any alternative source maintains compatibility with the specified LOCMOS family parameters.