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CD74HCT4520M, CD74HCT4520M96, CD74HCT4538

Table of contents:
Info of CD74HCT4520M
Info of CD74HCT4520M96
Info of CD74HCT4538

CD74HCT4520M, CD74HCT4520M96, CD74HCT4538 Selling Leads, Datasheet

MFG:Texas Instruments Category:Integrated Circuits (ICs) Package Cooled:Original D/C:99

CD74HCT4520M, CD74HCT4520M96, CD74HCT4538 Datasheet download

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Part Number: CD74HCT4520M

Category: Integrated Circuits (ICs)

MFG: Texas Instruments

Package Cooled: Original

D/C: 99

Description: IC DUAL BIN UP-COUNTER 16-SOIC

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CD74HCT4520M Parameters

Technical/Catalog Information	CD74HCT4520M
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
Logic Type	Binary Counter
Trigger Type	Positive, Negative
Voltage - Supply	4.5 V ~ 5.5 V
Number of Bits per Element	4
Number of Elements	2 - Dual
Direction	Up
Mounting Type	Surface Mount
Package / Case	16-SOIC (3.9mm Width)
Reset	Asynchronous
Packaging	Tube
Operating Temperature	-55°C ~ 125°C
Count Rate	25MHz
Timing	Synchronous
Drawing Number	296; 4040047-4; D; 16
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	CD74HCT4520M CD74HCT4520M 296 9285 5 ND 29692855ND 296-9285-5

CD74HCT4538 General Description

The 'HC4538 and 'HCT4538 are dual retriggerable/resettable monostable precision multivibrators for fixed voltage timing applications. An external resistor (R_X) and an external capacitor (C_X) control the timing and the accuracy for the circuit. Adjustment of RX and C_Xprovides a wide range of output pulse widths from the Q and Q terminals. The propagation delay from trigger input-tooutput transition and the propagation delay from reset input to-output transition are independent of RX and C_X.

Leading-edge triggering (A) and trailing edge triggering (B) inputs are provided for triggering from either edge of the input pulse. An unused "A" input should be tied to GND and an unused B should be tied to V_CC. On power up the IC is reset. Unused resets and sections must be terminated. In normal operation the circuit retriggers on the application of each new trigger pulse. To operate in the non-triggerable mode Q is connected to B when leading edge triggering (A) is used or Q is connected to A when trailing edge triggering (B) is used. The period () can be calculated from = (0.7)R_X, C_X; R_MINis 5k. C_MINis 0pF.

CD74HCT4538 Maximum Ratings

DC Supply Voltage, V_CC . . . . .  . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
DC Input Diode Current, I_IK
   For V_I< -0.5V or V_I > V_CC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Diode Current, I_OK
     For V_O< -0.5V or V_O> V_CC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Source or Sink Current per Output Pin, I_O
     For V_O > -0.5V or V_O < V_CC+ 0.5V . . . . . . . . . . . . . . . . . . . .±25mA
DC V_CCor Ground Current, I_CC. . . . . . . . . . . . . . . . . . . . . . . . .±50mA

CD74HCT4538 Features

• Retriggerable/Resettable Capability
• Trigger and Reset Propagation Delays Independent of R_X, C_X
• Triggering from the Leading or Trailing Edge
• Q and Q Buffered Outputs Available
• Separate Resets
• Wide Range of Output Pulse Widths
• Schmitt Trigger Input on A and B Inputs
• Retrigger Time is Independent of C_X
• Fanout (Over Temperature Range)
   - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
   - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55^oC to 125^oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL Logic ICs
• HC Types
   - 2V to 6V Operation
   - High Noise Immunity: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5V
• HCT Types
   - 4.5V to 5.5V Operation
   - Direct LSTTL Input Logic Compatibility,V_IL= 0.8V (Max), V_IH = 2V (Min)
- CMOS Input Compatibility, I_l 1A at V_OL, V_OH

CD74HCT4538 Connection Diagram

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