73S8009CN-32IM/F Maxim Integrated Products, 73S8009CN-32IM/F Datasheet - Page 14

• Manufacturer Part Number: 73S8009CN-32IM/F
• Description: IC PWR MGMT/SMART CARD INT 32QFN
• Manufacturer: Maxim Integrated Products

Specifications of 73S8009CN-32IM/F

• Applications: Smart Card Reader, Writer
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 32-VFQFN Exposed Pad
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -

73S8009CN Data Sheet
14
NOTES:
1) VPC = 2.7V to 6.5V DC
2) Resistor footprint is included in case some filtering is needed on CLK
3) Capacitors C4 and C5 are provisional and their footprints should be added for added noise rejection
4) Inductor must be rated for 400 mA maximum peak current.
5) VDD - 3.3V, +/- 0.3V, 40mA max. Schematic assumes VDD supplies power to the host controller.
6) The RDY signal is optional. A short delay before releasing RSTIN should suffice for the RDY
if necessary.
Requires min two 0.1µF caps to gnd)
signal function.
OFF_interrupt_to_uC
AUX1UC_to/from_uC
AUX2UC_to/from_uC
CMDVCC%_from_uC
CMDVCC#_from_uC
VDD_supply_to_uC
USB D+ to/from_uC
OFF_ACK_from_uC
USB D- to/from_uC
RDY_status_to_uC
I/OUC_to/from_uC
SC/USB_from_uC
OFF_REQ_to_uC
RSTIN_from_uC
CLKIN_from_uC
Figure 3: Typical 73S8009CN Application Schematic with a Main System Switch
See NOTE 6
VDD
0.1F
C1
See NOTE 5
73S80009CN
0.1F
C2
1
2
3
4
5
6
7
8
CMDVCC#
I/OUC
AUX1UC
AUX2UC
CMDVCC%
RSTIN
CLKIN
RDY
See NOTE 4
10µH
4.7µF
C7
VPC
ON/OFF
See NOTE 1
VDD
0.1F
C3
AUX1
AUX2
GND
32 QFN
VCC
RST
switch is
Card detection
normally closed
DM
I/O
24
23
22
21
20
19
18
17
R2
20K
10µF
C4
NOTE 2
0
See
Smart Card Connector
Pushbutton Switch
SW1
27pF
27pF
C5
C6
CLK track should be routed
far from RST, I/O, C4 and C8
NOTE 3
NOTE 3
0.47µF,
C8
See
See
Low ESR (<100mohms)
should be placed near the
SC connecter contact
DS_8009_026
Rev. 1.4