74HCT4538D NXP Semiconductors, 74HCT4538D Datasheet - Page 11

• Manufacturer Part Number: 74HCT4538D
• Description: LOGIC, 74HCT, MULTIVIBRATOR, SO16
• Manufacturer: NXP Semiconductors

Specifications of 74HCT4538D

• Multivibrator Type: Retriggerable Monostable
• Output Current: 4mA
• Propagation Delay: 35ns
• Logic Case Style: SO
• No. Of Pins: 16
• Supply Voltage Range: 4.5V To 5.5V
• Operating Temperature Range: -40°C To
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Philips Semiconductors
September 1993
Dual retriggerable precision monostable
multivibrator
Fig.11 Power-down protection circuit.
Fig.12 Typical pulse width accuracy versus external capacitance; V
Fig.13 Typical pulse width accuracy versus external resistance; V
11
Power-down considerations
A large capacitor (C
powering-down the monostable due to the energy stored
in this capacitor. When a system containing this device is
powered-down or a rapid decrease of V
the monostable may sustain damage, due to the capacitor
discharging through the input protection diodes. To avoid
this possibility, use a damping diode (D
germanium or Schottky type diode able to withstand large
current surges and connect as shown in Fig.11.
CC
CC
X
) may cause problems when
= 4.5 V; T
= 4.5 V; T
74HC/HCT4538
amb
amb
= 25 C.
= 25 C.
Product specification
CC
X
) preferably a
to zero occurs,