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AS3911 Datasheet(PDF) 9 Page - ams AG

Part # AS3911
Description  NFC Initiator / HF Reader IC
PDF  159 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3911 Datasheet(HTML) 9 Page - ams AG

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ams Datasheet
Page 9
[v2-11] 2016-Jun-13
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AS3911 − Electrical Characteristics
CMOS Outputs:
Valid for output pins MISO, IRQ and MCU_CLK, io_18=0 (See IO
Configuration Register 2).
Figure 8:
CMOS Outputs
Electrical Specification
VDD= 3.3V, Temperature 25°C unless noted otherwise.
3.3V supply mode, regulated voltages set to 3.4V, 27.12 MHz
Xtal connected to XTO and XTI.
Figure 9:
Electrical Specification
Symbol
Parameter
Conditions
Min
Type
Max
Unit
VOH
High level input voltage
ISOURCE = 1mA
ISINK = 1mA
0.9 *
VDD_IO
V
VOL
Low level input voltage
0.1 *
VDD_IO
V
CL
Capacitive load
50
pF
RO
Output Resistance
250
500
Ω
RPD
Pull-down resistance pin
MISO
Pull-down can be
enabled while MISO
output is in tristate.
The activation is
controlled by
register setting.
10
k
Ω
Symbol
Parameter
Min
Typ
Max
Unit
Comments
IPD
Supply current in
Power-down
mode
0.7
2
μA
Register 00h set to 0Fh (no clock on
MCU_CLK), register 01h set to 80h (3V
supply mode), register 02hset to 00h
register 03h set to 08h, other registers in
default state.
INFCT
Supply current in
initial NFC Target
mode
3.5
7
μA
Register 00h set to 0Fh (no clock on
MCU_CLK), register 01h set to 80h (3V
supply mode), register 02hset to 00h
register 03h set to 80h (enable NFC
Target mode), other registers in default
state.



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