CD74HCT221

Features: • Overriding RESET Terminates Output Pulse • Triggering from the Leading or Trailing Edge • Q and Q Buffered Outputs • Separate Resets • Wide Range of Output-Pulse Widths• Schmitt Trigger on B Inputs• Fanout (Over Temperature Range) - Stand...

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CD74HCT221 Picture
SeekIC No. : 004312121 Detail

CD74HCT221: Features: • Overriding RESET Terminates Output Pulse • Triggering from the Leading or Trailing Edge • Q and Q Buffered Outputs • Separate Resets • Wide Range of Out...

floor Price/Ceiling Price

Part Number:
CD74HCT221
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/3/27

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Product Details

Description



Features:

• Overriding RESET Terminates Output Pulse
• Triggering from the Leading or Trailing Edge
• Q and Q Buffered Outputs
• Separate Resets
• Wide Range of Output-Pulse Widths
• Schmitt Trigger on B Inputs
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . .10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . .-55 to 125
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL= 30%, NIH= 30% of VCC at VCC= 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH= 2V (Min)
- CMOS Input Compatibility, Il1µA at VOL, VOH



Application

Audio
Automotive
Broadband
Digital Control
Military
Optical Networking
Security
Telephony
Video & Imaging
Wireless



Pinout

  Connection Diagram


Specifications

DC Supply Voltage, VCC. . . . . . . . . . . . . . . . . . -0.5V to 7V
DC Input Diode Current, IIK
  For VI<-0.5V or VI> VCC+0.5V. . . . . . . . . . . . . . . . .±20mA
DC Output Diode Current, IOK
  For VO<-0.5V<VO<VCC+0.5V. . . . . . . . . . . . . . . . . . .±20mA
DC Drain Current, per Output, IO
  For-0.5V<VO< VCC+ 0.5V.  . . . . . . . . . . . . . . . . . . ±25mA
DC Output Source or Sink Current per Output Pin, IO
  For VO>-0.5V or VO< VCC+ 0.5V. . . . . . . . . . . . . . . . ±25mA
DC VCCor Ground Current, ICC . . . . . . . . . . . . . . . . . ±50mA



Description

The 'HC221 and CD74HCT221 are dual monostable multivibrators with reset. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit. Adjustment of RX and CX provides a wide range of output pulse widths from the Q and Q terminals. Pulse triggering on the B input occurs at a particular voltage level and is not related to the rise and fall time of the trigger pulse.

Once triggered, the outputs are independent of further trigger inputs on A and B. CD74HCT221 output pulse can be terminated by a LOW level on the Reset (R) pin. Trailing Edge triggering (A) and leading-edge-triggering (B) inputs are provided for triggering from either edge of the input pulse. On power up, the IC is reset. If either Mono is not used each input (on the unused device) must be terminated either high or low.

The minimum value of external resistance, RX, is typically 500. CD74HCT221 minimum value of external capacitance, CX, is 0pF. The calculation for the pulse width is tW = 0.7 RXCX at VCC = 4.5V.


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