This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.

Images are for reference only,

See Technical Specifications

HEF4521BT,653 +BOM

24-stage frequency divider and oscillator

Manufacturer:

Nexperia Semiconductor (NXP)
Mfr.Part #:

HEF4521BT,653
Datasheet:

HEF4521BT,653 Datasheet (PDF)
Feature-packaging:

Tape and Reel
Feature-pin-count:

16
Feature-cecc-qualified:

No
Feature-military:

No
EDA/CAD Models:

Request Free CAD Models for HEF4521BT,653

HEF4521BT,653 General Description

The HEF4521B consists of a chain of 24 toggle flip-flops with an overriding asynchronous master reset input (MR), and an input circuit that allows three modes of operation. The single inverting stage (A2 to Y2) functions as: a crystal oscillator, an input buffer for an external oscillator or in combination with A1 as an RC oscillator. The crystal oscillator operates in Low-power mode when pins V and V are supplied via external resistors.Each flip-flop divides the frequency of the previous flip-flop by two, consequently the HEF4521B counts up to 2 = 16777216. The counting advances on the HIGH-to-LOW transition of the clock (A2). The outputs from each of the last seven stages (2 to 2) are available for additional flexibility.It operates over a recommended V power supply range of 3 V to 15 V referenced to V (usually ground). Unused inputs must be connected to V, V, or another input.

Key Features

Wide supply voltage range from 3.0 V to 15.0 V
CMOS low power dissipation
High noise immunity
Low power crystal oscillator operation
Fully static operation
5 V, 10 V, and 15 V parametric ratings
Standardized symmetrical output characteristics
Complies with JEDEC standard JESD 13-B
ESD protection:HBM JESD22-A114F exceeds 2000 VMM JESD22-A115-A exceeds 200 V
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Specified from -40 °C to +85 °C

Nexperia Semiconductor (NXP) Original Stock

Specifications

feature-maximum-operating-supply-voltage-v		feature-minimum-operating-supply-voltage-v
feature-packaging	Tape and Reel	feature-pin-count	16
feature-cecc-qualified	No	feature-esd-protection
feature-military	No	feature-aec-qualified	No
feature-aec-qualified-number		feature-auto-motive	No
feature-p-pap	No	feature-eccn-code	EAR99
feature-svhc	No	feature-svhc-exceeds-threshold	No