ST8024LTR STMicroelectronics, ST8024LTR Datasheet - Page 23
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ST8024LTR
Manufacturer Part Number
ST8024LTR
Description
Interface - Specialized Smart card interface 3V or 5V 26 MHz
Manufacturer
STMicroelectronics
Datasheet
1.ST8024LTR.pdf
(35 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ST8024LTR
Manufacturer:
STMicroelectronics
Quantity:
2 000
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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