ST8024LTR STMicroelectronics, ST8024LTR Datasheet - Page 22
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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
Functional description
Note:
Table 22.
Figure 5.
22/35
The clock may be applied to the card using the following sequence (see
If the applied clock is not needed, then CMDVCC may be set low with RSTIN low. In this
case, CLK starts at t
be set high in order to obtain an “answer to request” (ATR) from the card.
Activation should not be performed with RSTIN held permanently high.
It is recommended that no control smartcard signals are to be shared with any other
devices. Sharing may result in inadvertent activation or deactivation of the smartcard.
Card presence indicator
Activation sequence using RSTIN and CMDVCC
OFF
H
L
1. Set RSTIN high.
2. Set CMDVCC low.
3. Reset RSTIN low between t
4. RST remains low until t
5. After t
pulses before toggling RST.
5
, RSTIN has no further affect on CLK; this allows a precise count of CLK
3
(minimum 200 ns after the transition on I/O), and after t
Doc ID 17709 Rev 5
5
, when RST is enabled to be the copy of RSTIN.
CMDVCC
3
and t
H
H
5
; CLK starts at this moment.
Card not present
Card present
Indication
Figure
5
, RSTIN may
5):
ST8024L