ST8024LTR STMicroelectronics, ST8024LTR Datasheet - Page 23

• Manufacturer Part Number: ST8024LTR
• Description: Interface - Specialized Smart card interface 3V or 5V 26 MHz
• Manufacturer: STMicroelectronics

Specifications of ST8024LTR

• Product Category: Interface - Specialized
• Rohs: yes
• Product Type: Smart Card Interface
• Operating Supply Voltage: 2.7 V to 6.5 V
• Supply Current: 1.2 mA
• Maximum Power Dissipation: 0.56 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-20
• Minimum Operating Temperature: - 25 C

ST8024L
Figure 6.
6.7
6.8
Activation sequence at t
Active mode
When the activation sequence is completed, the ST8024L is in its active mode. Data are
exchanged between the card and the microcontroller via the I/O lines.
The ST8024L is designed for cards without V
the internal non-volatile memory).
Deactivation sequence
When a session is completed, the microcontroller sets the CMDVCC line HIGH. The circuit
then executes an automatic deactivation sequence by counting the sequencer back and
finishing in the inactive mode (see
1.
2.
3.
4.
5.
6.
7.
CLK is held low (t
oscillator (approximately 25 µs).
V
The deactivation sequence is complete at t
remain at V
RST goes low (t
I/O, AUX1, and AUX2 are pulled low (t
All card contacts become low impedance to GND; I/OUC, AUX1UC, and AUX2UC
The internal oscillator returns to its lower frequency.
CC
starts to fall towards zero (t
DD
(pulled-up via an 11 kΩ resistor).
10
12
).
= t
3
10
+ 0.5 x T) where T is 64 times the period of the internal
Doc ID 17709 Rev 5
Figure
14
= t
7):
10
13
+ 1.5 x T).
PP
= t
DE
(the voltage required to program or erase
10
, when V
+ T).
CC
reaches its inactive state.
Functional description
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