73S1217F Maxim, 73S1217F Datasheet - Page 26

• Manufacturer Part Number: 73S1217F
• Description: The Teridian 73S1217F is a self-contained SoC smart card reader IC that is an ideal solution for any USB-connected ISO 7816 design
• Manufacturer: Maxim

The 73S1217F contains a power supply and converter circuit that takes power from any one of three
sources; V
1.7.2
The detailed power supply management logic block diagram is shown in Figure 5.
V
voltage range of 2.7 to approximately 3.1 volts or by a standard supply of 3.3 or 5 volts.
26
PC
is specified to range from 2.7 to 6.5 volts. It can typically be supplied by a single cell battery with a
ON_OFF
V
V
Power Supply Management
BUS
BAT
PC
, V
BUS
, or V
Figure 5: Detailed Power Management Logic Block Diagram
Debounce
Circuit
MPU
BAT
PWRDN*
.
V
BUSTH
INT
*PWRDN bit in MISCtl0
Control
Power
VCC Enable
+
-
D
SET
CLR
Q
Q
Pass Through
Mode Enable
VCC Voltage
NO
NC
Circuit
(POR)
Delay
Select
Internal
Circuits
VDD to
S
R
SET
CLR
Q
Q
Regulator
Regulator
VCC
VDD
EN
Converter
Through*
DC-DC
VP
/ Pass
*Pass Through -> VP = VPC
VPC
VCC
VDD
OFF_REQ
INT3
LIN
VP
To optional
external
circuits
20mA max.
Smart
Card
Power
Rev. 1.2