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AS3911B Datasheet(PDF) 9 Page - ams AG

Part # AS3911B
Description  NFC Initiator / HF Reader IC
PDF  155 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3911B Datasheet(HTML) 9 Page - ams AG

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ams Datasheet: 2014-Jun-12 [v1-08]
AS3911B – 9
El ec trical Charac t e ristics
CMOS Outputs:
Valid for output pins MISO, IRQ and MCU_CLK, io_18=0 (See “IO
Configuration Register 2” on page 67.).
Figure 8:
CMOS Outputs
Electrical Specification
VDD= 3.3 V, Temperature 25°C unless noted otherwise.
3.3V supply mode, regulated voltages set to 3.4 V, 27.12 MHz
Xtal connected to XTO and XTI.
Figure 9:
Electrical Specification
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VOH
High level output voltage
ISOURCE = 1mA
ISINK = 1mA
0.9 *
VDD_IO
VDD_IO
V
VOL
Low level output voltage
0
0.1 *
VDD_IO
V
CL
Capacitive load
0
50
pF
RO
Output Resistance
0
250
550
Ω
RPD
Pull-down resistance pin
MOSI
Pull-down can be
enabled while MISO
output is in tristate.
The activation is
controlled by
register setting.
510
15
k
Ω
Symbol
Parameter
Min
Typ
Max
Unit
Comments
IPD
Supply current in
Power-down
mode
0.2
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
2.2
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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