NCN8024R
ESD PROTECTION
CRD_RST,
CRD_CLK,
CRD_IO,
CRD_AUX1,
The NCN8024R includes devices to protect the pins
against the ESD spikes voltages. To cope with the different
ESD voltages developed across these pins, the built in
structures have been designed to handle either 2 kV, when
related to the micro controller side, or 8 kV when connected
with the external contacts (HBM model). Practically, the
CRD_AUX2, CRD_PRES and CRD_PRES pins can sustain
8 kV. The CRD_VCC pin has the same ESD protection and
can source up to 70 mA continuously, the absolute
maximum current being internally limited with a max at
150 mA. The CRD_VCC current limit depends on V
and CRD_VCC.
DDP
VDD
+3.3V
XTAL1 XTAL2
AUX2uc
AUX1uc
CLKDIV1
CLKDIV2
5V/3V
I/Ouc
3.3 V Microcontroller
NC
GNDP
100 nF
10 mF
CLKIN
INT
NC
VDDP
GND
NC
100 nF
VDD
NC
RSTIN
CMDVCC
CRD_PRES
CRD_PRES
CRD_I/O
PORADJ
Optional R1/R2 resistor divider − if not
used PORADJ has to be connnected to
Ground
CRD_AUX2
CRD_VCC
CRD_RST
R1
R2
100 kW
CRD_AUX1
CRD_GND
VDD
CRD_CLK
+3.3V
220 nF
1
2
3
4
5
6
7
8
VCC
RST
CLK
C4
100 nF
GND
VPP
I/O
C8
DET
Normally Open
SMART CARD
Figure 8. Application Schematic
Package
ORDERING INFORMATION
Device
†
Shipping
NCN8024RDWR2G
SOIC−28
(Pb−Free)
1000 / Tape & Reel
NCN8024RDTBR2G*
TSSOP−28
(Pb−Free)
2500 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*Consult Sales Office
http://onsemi.com
13
ONSEMI [ ONSEMI ]
