Welcome to Chinaicmart  Sign In  Join Free
  • Suppliers Datasheet
  • Exact Match 
Escrow Service
  • Get a Quote/Urgent Purchase
  • Part Number
  • Qty

Response in 12 hours

CD4538

Current position:Home > Product map > CD4538

RFQ for CD4538

Required Field
Part Number: Quantity:
Country/Region: Email:
Description:
    Chat with me
Please fill in the part number: CD4538, and complete your requirements of CD4538 and contact details, such as your company name, contacter, telephone and so on, So that suppliers can directly contact you.
SeekIC Live Chat Custom PCB Prototype

Parameters

Technical/Catalog InformationCD4538BCM
VendorFairchild Semiconductor
CategoryIntegrated Circuits (ICs)
Logic TypeMonostable
Independent Circuits2
Voltage - Supply3 V ~ 15 V
Mounting TypeSurface Mount
Package / Case16-SOIC
PackagingTube
Operating Temperature-55°C ~ 125°C
Propagation Delay100ns
Current - Output High, Low8.8mA, 8.8mA
Schmitt Trigger InputNo
Drawing Number*
Lead Free StatusLead Free
RoHS StatusRoHS Compliant
Other Names CD4538BCM
CD4538BCM

Product Manufacturers Pack D/C
CD4538 - - -

Pinout/Connection Diagram

cd4538 Circuit

This electronic ignition circuit is intended to be inserted into a car's conventional ignition system. In effect, it replaces the original 12-V switching circuit in the primary winding of the coil by one generating more than 100 V. It thereby converts a current circuit, which is upset by lead and stray resistance, into a voltage circuit that is much more efficient.

The pulses emanating from the contact breaker, shown at the extreme lower left-hand side of the dia-sram, are applied to transistor T1 and subsequently differentiated by R3/C1. This causes a negligible igni-tion delay. The current through the contact-breaker points is determined by the value of R1. This value has been chosen to ensure that the points remain clean.

Transistor T1 is followed by two monostables, IC1A and IC1B, which are both triggered by the output pulses of T1. However, whereas IC1A is triggered by the trailing edge, IC1B is triggered by the leading edge.

Monostable IC1A passes a pulse of about 1.5 ms (determined by R4/C2) to NAND gate IC2A. This gate switches off high-voltage Darlington T3 via gates IC2B, IC2C and IC2D, and driver T2, for the dura-tion of the pulse. Gate IC2 ensures that T3 is switched on only when the engine is running, to prevent a current of some amperes flowing through the ignition coil.

As long as pulses emanate from the contact breaker, ICIB is triggered and its Q output remains logic high. The mono time of this stage is about 1 s and is determined by R5/C3.

Darlington T3 is switched on via T2 and IC2A through IC2D as long as IC1A does not pass an ignition pulse. When the engine is not running, the Q output of IC2B goes low after 1 s and this causes T2 and T3 to be switched off. The two series-connected 180-V zener diodes protect the collector of the BU932R against too high of a voltage. The Darlington must be fitted on a suitable heatsink.

Supplier

Post a Buying Lead

PDF / Datasheet

CD4538BC PDF Download

CD4538BC

File Size: 141872 KB
Manufacturer: fairchild

Related PDF

CD4/74AC563
File Size: 245957 KB
Manufacturer:
CD4000
File Size: 144052 KB
Manufacturer:TI [Texas Instruments]
CD4000BMS
File Size: 147244 KB
Manufacturer:INTERSIL [Intersil Corporation]
CD4001
File Size: 168715 KB
Manufacturer:INTERSIL [Intersil Corporation]
CD40011
File Size: 171631 KB
Manufacturer:NSC [National Semiconductor]

Related Models

  Models MFG Pack
CD400
CD4000
CD40098
CD4009AF
CD4009BCJ
CD4009BE
CD4009BF
CD4009BF3A
CD4009UBE
CD4009UBF
CD4009UBF3A
CD4009UBFX
CD4009UBPWR
CD4010
CD40100BE
CD40100BF
CD40100BF3A
CD40101
CD40101BE
CD40101BF
Part Number Include: A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  0  1  2  3  4  5  6  7  8  9 

© 2009 China Electronics Market