DS8007_11 Datasheet, PDF (11/41 Pages) Maxim Integrated Products – Multiprotocol Dual Smart Card Interface 8kV (min) ESD Protection on Card Interfaces

Multiprotocol Dual Smart Card Interface
Pin Description
PIN
NAME
FUNCTION
Reset Output. This active-high output is provided for resetting external devices. The RSTOUT pin is driven
1
RSTOUT high until the DELAY pin reaches VDRST. Once the DELAY pin reaches VDRST, the RSTOUT pin is three-
stated so it can externally be pulled down. The SUPL bit is set for each RSTOUT pulse.
2
I/OAUX Auxiliary I/O. This I/O pin allows connection to an auxiliary smart card interface.
3
I/OA
Smart Card A I/O Data Line. This is the I/O data line associated with smart card A. This is also referred to
as the ISO C7 contact.
4
C8A
Smart Card A Auxiliary I/O. This is an auxiliary I/O associated with smart card A. This is also referred to
as the ISO C8 contact. This can be associated with synchronous cards.
5
PRESA Smart Card A Presence Contact. This is the active-high presence contact associated with smart card A.
6
C4A
Smart Card A Auxiliary I/O. This is an auxiliary I/O associated with smart card A. This is also referred to
as the ISO C4 contact. This can be associated with synchronous cards.
7
GNDA Smart Card A Ground. This must be connected to GND.
8
CLKA
Smart Card A Clock Output. This is the clock output associated with smart card A. This is also referred to
as the ISO C3 contact.
9
V_CCA
Smart Card A Supply Voltage. This is the supply voltage output associated with smart card A. This is also
referred to as the ISO C1 contact.
10
RSTA
Smart Card A Reset. This is the reset output associated with smart card A. This is also referred to as the
ISO C2 contact.
11
I/OB
Smart Card B I/O Data Line. This is the I/O data line associated with smart card B. This is also referred to
as the ISO C7 contact.
12
C8B
Smart Card B Auxiliary I/O. This is an auxiliary I/O associated with smart card B. This is also referred to
as the ISO C8 contact. This can be associated with synchronous cards.
13
PRESB Smart Card B Presence Contact. This is the active-high presence contact associated with smart card B.
14
C4B
Smart Card B Auxiliary I/O. This is an auxiliary I/O associated with smart card B. This is also referred to
as the ISO C4 contact. This can be associated with synchronous cards.
15
GNDB Smart Card B Ground. This must be connected to GND.
Smart Card B Clock Output. This is the clock output associated with smart card B. This is also referred to
16
CLKB _{as the ISO C3 contact.}
Smart Card B Supply Voltage. This is the supply voltage output associated with smart card B. This is also
17
V_CCB
referred to as the ISO C1 contact.
18
RSTB
Smart Card B Reset. This is the reset output associated with smart card B. This is also referred to as the
ISO C2 contact.
19
GND Ground
20
V_UP
Step-Up Converter Connection. Connect a low-ESR capacitor of 220nF between this pin and ground.
21
CPA1 Step-Up Converter Contact 1. Connect a low-ESR capacitor of 220nF between CPA1 and CPA2.
22
CPB1 Step-Up Converter Contact 3. Connect a low-ESR capacitor of 220nF between CPB1 and CPB2.
23
V_DDA
Analog Supply Voltage. Positive analog-supply voltage for the step-up converter; can be higher but not
lower than V_DD. This pin should be decoupled to AGND with a good quality capacitor.
______________________________________________________________________________________ 11