CD74HCT4538M96 ,High Speed CMOS Logic Dual Retriggerable Precision Monostable Multivibrators CD54HC4538, CD74HC4538,CD54HCT4538, CD74HCT4538Data sheet acquired from Harris SemiconductorSCHS12 ..
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CD74HCT4538E-CD74HCT4538M96
High Speed CMOS Logic Dual Retriggerable Precision Monostable Multivibrators
CD54HC4538, CD74HC4538, CD54HCT4538, CD74HCT4538 SCHS123E High-Speed CMOS Logic Dual Retriggerable June 1998 - Revised October 2003 Precision Monostable Multivibrator Features Description • Retriggerable/Resettable Capability The ’HC4538 and ’HCT4538 are dual retriggerable/resettable monostable precision multivibrators • Trigger and Reset Propagation Delays Independent of for fixed voltage timing applications. An external resistor [ /Title R , C X X (R ) and an external capacitor (C ) control the timing and X X (CD54 the accuracy for the circuit. Adjustment of R and C • Triggering from the Leading or Trailing Edge X X HC453 provides a wide range of output pulse widths from the Q and Q Buffered Outputs Available • Q and Q terminals. The propagation delay from trigger input-to- 8, output transition and the propagation delay from reset input- • Separate Resets CD74 to-output transition are independent of R and C . X X HC453 • Wide Range of Output Pulse Widths B) Leading-edge triggering (A) and trailing edge triggering ( 8, B Inputs • Schmitt Trigger Input on A and inputs are provided for triggering from either edge of the CD74 input pulse. An unused “A” input should be tied to GND and • Retrigger Time is Independent of C X HCT45 an unused B should be tied to V . On power up the IC is CC • Fanout (Over Temperature Range) reset. Unused resets and sections must be terminated. In 38) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads normal operation the circuit retriggers on the application of /Sub- each new trigger pulse. To operate in the non-triggerable - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads ject mode Q is connected to B when leading edge triggering (A) o o • Wide Operating Temperature Range . . . -55 C to 125 C (High is used or Q is connected to A when trailing edge triggering (B) is used. The period (τ) can be calculated from τ = (0.7) Speed • Balanced Propagation Delay and Transition Times R , C ; R is 5kΩ. C is 0pF. X X MIN MIN CMOS • Significant Power Reduction Compared to LSTTL Logic Logic ICs Ordering Information • HC Types TEMP. RANGE - 2V to 6V Operation o PART NUMBER ( C) PACKAGE - High Noise Immunity: N = 30%, N = 30% of V IL IH CC CD54HC4538F3A -55 to 125 16 Ld CERDIP at V = 5V CC CD54HCT4538F3A -55 to 125 16 Ld CERDIP • HCT Types - 4.5V to 5.5V Operation CD74HC4538E -55 to 125 16 Ld PDIP - Direct LSTTL Input Logic Compatibility, CD74HC4538M -55 to 125 16 Ld SOIC V = 0.8V (Max), V = 2V (Min) IL IH - CMOS Input Compatibility, I ≤ 1µA at V , V l OL OH CD74HC4538MT -55 to 125 16 Ld SOIC CD74HC4538M96 -55 to 125 16 Ld SOIC Pinout CD54HC4538, CD54HCT4538 CD74HC4538NSR -55 to 125 16 Ld SOP (CERDIP) CD74HC4538PW -55 to 125 16 Ld TSSOP CD74HC4538 (PDIP, SOIC, SOP, TSSOP) CD74HC4538PWR -55 to 125 16 Ld TSSOP CD74HCT4538 (PDIP, SOIC) CD74HC4538PWT -55 to 125 16 Ld TSSOP TOP VIEW CD74HCT4538E -55 to 125 16 Ld PDIP 1C 1 16 V X CC CD74HCT4538M -55 to 125 16 Ld SOIC 1R C 2 15 2C X X X 1R 3 14 2R C X X CD74HCT4538MT -55 to 125 16 Ld SOIC 1A 4 13 2R CD74HCT4538M96 -55 to 125 16 Ld SOIC 1B 5 12 2A 1Q 6 11 2B NOTE: When ordering, use the entire part number. The suffixes 96 and R denote tape and reel. The suffix T denotes a small-quantity 1Q 7 10 2Q reel of 250. GND 8 9 2Q CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © 2003, 1
