74HC4538D,652 NXP Semiconductors, 74HC4538D,652 Datasheet - Page 11

• Manufacturer Part Number: 74HC4538D,652
• Description: IC MULTIVIBRATOR DL MONO 16SOIC
• Manufacturer: NXP Semiconductors
• Series: 74HCr

Specifications of 74HC4538D,652

• Logic Type: Monostable
• Package / Case: 16-SOIC (3.9mm Width)
• Independent Circuits: 2
• Schmitt Trigger Input: Yes
• Propagation Delay: 25ns
• Voltage - Supply: 2 V ~ 6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Elements Per Chip: 2
• Logic Family: HC
• Input Bias Current (max): 0.008 mA
• Propagation Delay Time: 265 ns, 53 ns, 45 ns
• High Level Output Current: - 5.2 mA
• Low Level Output Current: 5.2 mA
• Supply Voltage (max): 6 V
• Supply Voltage (min): 2 V
• Maximum Power Dissipation: 500 mW
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output High, Low: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-1471-5; 74HC4538D; 933714910652

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,