73S8009C Maxim, 73S8009C Datasheet - Page 29

• Manufacturer Part Number: 73S8009C
• Description: The 73S8009C is a versatile power management and single smart card interface circuit that is ideally suited for smart card reader products that are battery- and/or USB bus-powered
• Manufacturer: Maxim

DS_8009C_025
Note:
Notes:
Rev. 1.5
Pins CMDVCC%, CMDVCC#, CS have the pull-up enabled.
Pins RSTIN, CLKIN, PRES, EXT_RST have the pull-down enabled.
Pin OFF_ACK has a 100 kΩ resistor connected to pin OFF_REQ internally.
Strong PFET or NFET is approximately 100
Very strong PFET or NFET is approximately 50
Medium strength PFET is approximately 1 k
Very weak PFET or NFET is approximately 1 M
The diodes represent ESD protection devices that will conduct current if forward biased.
Disable
Output
circuit
From
Data
Pull-down
circuit
Enable
Disable
Pull-up
To
Figure 19: OFF_REQ Interface Circuit
Figure 18: General Input Circuit
Ω.
Ω.
Ω.
Ω.
STRONG
STRONG
PFET
WEAK
NFET
VERY
PFET
VDD
WEAK
VDD
VERY
NFET
ESD
100k ohm
ESD
ESD
OFF_ACK
ESD
PIN
pad
To
PIN
73S8009C Data Sheet
29