Details

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BUY CD14538BF https://www.utsource.net/itm/p/660490.html
CMOS DUAL PRECISION MONOSTABLE MULTIVIBRATOR

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	-	2.0	-	5.5	V
Output Current (Sink)	IO(Sink)	VDD = 5V, VOL = 0.4V	8	-	-	mA
Output Current (Source)	IO(Source)	VDD = 5V, VOH = 4.6V	-	-	0.4	mA
Input Leakage Current	II	VIN = VDD	-1	-	1	μA
Propagation Delay Time	tpd	VDD = 5V, TA = 25°C	17	-	34	ns
Monostable Pulse Width	tW	VDD = 5V, REXT = 1MΩ, CEXT = 10nF	10	-	-	ms

Instructions for CD14538BF

1. Power Supply:

   • Ensure the supply voltage (VDD) is within the range of 2.0V to 5.5V.

2. Output Current:

   • The device can sink up to 8mA when operating at VDD = 5V and VOL = 0.4V.
   • It can source up to 0.4mA when operating at VDD = 5V and VOH = 4.6V.

3. Input Handling:

   • Keep input leakage current within ±1μA by ensuring proper input signal levels and impedance matching.

4. Timing Considerations:

   • Account for propagation delay time which can vary between 17ns and 34ns depending on conditions.

5. Monostable Operation:

   • For monostable operation, use external resistor (REXT) and capacitor (CEXT) to set the pulse width. A typical setup with REXT = 1MΩ and CEXT = 10nF yields a pulse width of approximately 10ms.

6. Handling and Storage:

   • Store in a dry environment and handle with care to avoid damage from electrostatic discharge (ESD).

7. Application Notes:

   • Refer to manufacturer’s application notes for detailed guidelines on optimal circuit design and troubleshooting.

(For reference only)