CD74HC4538-Q1 Datasheet, PDF (4/16 Pages) Texas Instruments – HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR

CD74HC4538-Q1
HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE
PRECISION MONOSTABLE MULTIVIBRATOR
SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008
recommended operating conditions (see Note 3)
MIN
MAX UNIT
V_CC Supply voltage
2
6V
V_CC = 2 V
1.5
V_IH High-level input voltage
V_CC = 4.5 V
3.15
V
V_CC = 6 V
4.2
V_CC = 2 V
0.5
V_IL Low-level input voltage
V_CC = 4.5 V
1.35 V
V_CC = 6 V
1.8
V_I
Input voltage
0
V_CC
V
V_O Output voltage
0
V_CC
V
V_CC = 2 V
0
1000
Reset input
V_CC = 4.5 V
0
500
t_t
Input transition (rise and fall) time
V_CC = 6 V
V_CC = 2 V
0
400
ns
0 Unlimited
Trigger inputs A or B VCC = 4.5 V
0 Unlimited
V_CC = 6 V
0 Unlimited
R_X External timing resistor (see Note 4)
5
kΩ
C_X External timing capacitor (see Note 4)
0
F
T_A Operating free-air temperature
−40
125 °C
NOTES:
3. All unused inputs of the device must be held at V_CC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
4. The maximum allowable values of R_X and C_X are a function of leakage of capacitor C_X, leakage of the CD74HC4538, and leakage
due to board layout and surface resistance. Values of R_X and C_X should be chosen so that the maximum current into pin 2 or
pin 14 is 30 mA. Susceptibility to externally induced noise signals may occur for R_X > 1 MΩ.
4
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