DS8113 Maxim, DS8113 Datasheet - Page 16

• Manufacturer Part Number: DS8113
• Description: The DS8113 smart card interface is a low-cost, analog front-end for a smart card reader, designed for all ISO 7816, EMV™, and GSM11-11 applications
• Manufacturer: Maxim

Smart Card Interface
Performance can be affected by the layout of the appli-
cation. For example, an additional cross-capacitance of
1pF between card reader contacts C2 (RST) and C3
(CLK) or C2 (RST) and C7 (I/O) can cause contact C2
to be polluted with high-frequency noise from C3 (or
C7). In this case, include a 100pF capacitor between
contacts C2 and CGND.
Application recommendations include the following:
With all these layout precautions, noise should be kept
to an acceptable level and jitter on C3 (CLK) should be
less than 100ps. Reference layouts, designs, and an
evaluation kit are available on request.
16
• Ensure there is ample ground area around the
• The DS8113 and the host microcontroller must use
• Trace C3 (CLK) should be placed as far as possi-
• The trace connecting CGND to C5 (GND) should
• Avoid ground loops among CGND, PGND, and
______________________________________________________________________________________
DS8113 and the connector; place the DS8113
very near to the connector; decouple the VDD and
VDDA lines separately. These lines are best posi-
tioned under the connector, connected in a star on
the main trace.
the same VDD supply. Pins CLKDIV1, CLKDIV2,
RSTIN, PRES, AUX1IN, I/OIN, AUX2IN, 5V/3V,
1_8V, CMDVCC, and OFF are referenced to VDD;
if pin XTAL1 is to be driven by an external clock,
also reference this pin to VDD.
ble from the other traces.
be straight (the two capacitors on C1 (VCC)
should be connected to this ground trace).
GND.
Applications Information
Note: Contact the factory for availability of other variants and
package options.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
DS8113-RNG+
DS8113-JNG+
PACKAGE TYPE
28 SO (300 mils)
PART
28 TSSOP
MODE POWER
LOW STOP-
PACKAGE CODE
Yes
Yes
Package Information
W28+6
U28+2
MODE POWER
LOW ACTIVE-
Selector Guide
Yes
Yes
DOCUMENT NO.
21-0042
21-0066
PIN-
PACKAGE
28 SO
28 TSSOP