The DS8113 supports three smart card VCC voltages: 1.8V," />
參數(shù)資料
型號: DS8113-JNG+
廠商: Maxim Integrated Products
文件頁數(shù): 7/17頁
文件大?。?/td> 0K
描述: IC INTERFACE SMART CARD 28-TSSOP
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 241
應用: 智能卡
接口: 模擬
電源電壓: 2.7 V ~ 6 V
封裝/外殼: 28-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 28-TSSOP
包裝: 管件
安裝類型: 表面貼裝
Smart Card Power Select
The DS8113 supports three smart card VCC voltages:
1.8V, 3V, and 5V. The power select is controlled by the
1_8V and 5V/3V signals as shown in Table 3. The 1_8V
signal has priority over 5V/3V. When 1_8V is asserted
high, 1.8V is applied to VCC when the smart card is
active. When 1_8V is deasserted, 5V/3V dictates VCC
power range. VCC is 5V if 5V/3V is asserted to a logic-
high state, and VCC is 3V if 5V/3V is pulled to a
logic-low state. Care must be exercised when switching
from one VCC power selection to the other. If both 1_8V
and 5V/3V are high with CMDVCC high at the same
time, the DS8113 enters stop mode. To avoid acciden-
tal entry into stop mode, the state of 1_8V and 5V/3V
must not be changed simultaneously. A minimum delay
of 100ns should be observed between changing the
states of 1_8V and 5V/3V. See Figure 9 for the recom-
mended sequence of changing the VCC range.
DS8113
Smart Card Interface
______________________________________________________________________________________
15
VCC SELECT
STOP MODE
1.8V
3V
5V
1_8V
5V/3V
CMDVCC
Figure 9. Smart Card Power Select
Table 3. VCC Select and Operation Mode
1_8V
5V/3V
CMDVCC
VCC SELECT (V)
CARD INTERFACE STATUS
0
3
Activated
0
1
3
Inactivated
0
1
0
5
Activated
0
1
5
Inactivated
1
0
1.8
Activated
1
0
1
1.8
Inactivated
1
0
1.8
Reserved (Activated)
1
1.8
Not Applicable—Stop Mode
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