EM4450
EM4550
Absolute Maximum Ratings
Parameter
Symbol
Conditions
Maximum AC peak Current
induced on COIL1 and COIL2
Power Supply
ICOIL
± 30 mA
VDD
Vmax
Vmin
Tstore
-0.3 to 3.5 V
VDD+0.3V
Maximum Voltage other pads
Minimum Voltage other pads
Storage temperature
Electrostatic discharge
maximum
VSS-0.3V
-55 to +125°C
VESD
2000V
to MIL-STD-883C method
3015
Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified
operating conditions may affect device reliability or cause malfunction.
Handling Procedures
This device has built-in protection against high static voltages or electric fields; however, anti-static precautions must be
taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal
voltages are kept within the voltage range. Unused inputs must always be tied to a defined logic voltage level.
Operating Conditions
Parameter
Symbol Min
Max Unit
Operating Temperature
Maximum coil current
AC Voltage on Coil
Supply Frequency
Top
ICOIL
Vcoil
fcoil
-40
+85
10
°C
mA
Vpp
note 1
150 kHz
100
note 1: Maximum voltage is defined by forcing 10mA on Coil1 - Coil2.
Electrical Characteristics
VDD =2.5V, VSS =0V , fcoil = 125 kHz Sine wave , Vcoil = 1Vpp
,
Top = 25°C , unless otherwise specified
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Supply Voltage
VDD
2.3
3.2
V
Minimum EEPROM write
voltage
Power Check EEPROM write
Supply current / read
Suppy current / write
VDDee
2
V
IPWcheck
Ird
Iwr
VDD = 2.8V
32
3
22
µA
µA
Read Mode
Write mode (VDD = 2.8V)
µA
V(COIL1 - VSS) & V(COIL2 - VSS) Icoil = 100µA
V(COIL1 - VSS) & V(COIL2 - VSS) Icoil = 5 mA
0.50
2.50
85
V
Modulator ON voltage drop
VON
V
Monoflop
Resonance Capacitor
Powercheck level
Tmono
Cr
35
166.6
2
µs
170
173.4
2.7
pF
VPWcheck
Vprh
V
Power On Reset level high
Clock extractor input min.
Clock extractor input max.
EEPROM data endurance
EEPROM retention
Rising Supply
1
1.5
V
Vclkmin
Vclkmax
Ncy
Minimum Voltage for Clock Extraction
Max. Voltage to detect modulation stop
Erase all / Write all at VDD = 3.5 V
Top = 55°C after 100'000 cycles (note 2)
0.25
Vpp
mVpp
cycles
years
25
100'000
10
Tret
note 2: Based on 1000 hours at 150°C
3
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