73S8023C-IM/F Maxim Integrated Products, 73S8023C-IM/F Datasheet - Page 11

• Manufacturer Part Number: 73S8023C-IM/F
• Description: IC SMART CARD INTERFACE 32-QFN
• Manufacturer: Maxim Integrated Products
• Type: Smart Card Interfacer

Specifications of 73S8023C-IM/F

• Controller Type: Smart Card Interface
• Interface: *
• Voltage - Supply: 2.7 V ~ 3.6 V
• Current - Supply: 4.9mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN Exposed Pad
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS_8023C_019
8 Activation and Deactivation
8.1 Activation Sequence (Synchronous Mode)
The 73S8023C smart card interface IC has an internal ~10 ms delay at power-on reset or on application
of V
activate the card.
The following steps list the activation sequence and the timing of the card control signals when the
system controller sets CMDVCC low:
1. CMDVCC is set low.
2. Turn on V
3. RST is a copy of RSTIN and CLK is a copy of STROBE after (t
8.2 Deactivation Sequence (Synchronous Mode)
Deactivation is initiated either by the system controller by setting the CMDVCC high, or automatically in
the event of hardware faults. Hardware faults are over-current, overheating, V
during the session and are indicated to the system controller by the fall of OFF.
The following steps list the deactivation sequence and the timing of the card control signals when the
system controller sets the CMDVCC high or a fault condition sets OFF low:
1. RST goes low at time t
2. CLK stops low at time t
3. I/O goes low at time t
4. V
Rev. 1.5
CMDVCC
STROBE
DD
RSTIN
CC
VCC
RST
CLK
> V
t
t
ACT
1
IO
is shut down at time t
> 0.5µs after t
DDF
~= 500µs
. No activation is allowed at this time. CMDVCC (edge triggered) must then be set low to
CC
and I/O (AUX1, AUX2) to reception mode at the end of (t
ACT
3
. Out of reception mode.
, RST = RSTIN, CLK = STROBE
1
2
.
t
.
ACT
Figure 3: Activation Sequence – Synchronous Mode
4
. After a delay t
t
1
5
(discharge of the V
1
CC
).
capacitor), V
ACT
).
DD
fault and card extraction
73S8023C Data Sheet
CC
is low.
11