U3280M Datasheet, PDF (13/18 Pages) ATMEL Corporation – TRANSPONDER INTERFACE FOR MICROCONTROLLER

U3280M
DC Characteristics (Continued)
Supply voltage V_DD = 1.8 V to 6.5 V, V_SS = 0 V, T_amb = -40° C to 85° C unless otherwise specified
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Serial Interface I/O Pins SCL and SDA
Input LOW voltage
Input HIGH voltage
Input leakage current
Output LOW current
Output HIGH current
V_DD = 2.0 V
V_OL = 0.2 V_DD
V_DD = 6.0 V
V_DD = 2.0 V
V_OH = 0.8 V_DD
V_DD = 6.0 V
V_IL
V_IH
V_IH
0.7 ×
V_DD
I_Ileakage
10
0.7
0.9
I_OL
2.8
3.5
-0.5
-0.6
I_OH
-1.8
-2.2
Max.
0.3 ×
V_DD
V_DD
1.1
4.2
-0.7
-2.6
Unit
V
V
nA
mA
mA
mA
mA
AC Characteristics
Supply voltage V_DD = 1.8 V to 6.5 V, V_SS = 0 V, T_amb = -40° C to 85° C unless otherwise specified
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Serial Interface Timing
SCL clock frequency
Clock low time
Clock high time
SDA and SCL rise time
SDA and SCL fall time
START condition setup time
START condition hold time
Data input setup time
Data input hold time
STOP condition setup time
Bus free time
Input filter time
Data output hold time
Coil Inputs
f_SCL
t_LOW
t_HIGH
t_R
t_F
t_SUSTA
t_HDSTA
t_SUDAT
t_HDDAT
t_SUSTO
t_BUF
t_I
t_DH
0
4.7
4.0
4.7
4.0
250
0
4.7
4.7
300
100
kHz
µs
µs
1000
ns
300
ns
µs
µs
ns
ns
µs
µs
100
ns
1000
ns
Coil frequency
Gap Detection
Delay field off to GAP = 0
Delay field on to GAP = 1
Power Management
V_coilGap < 0.7 V_DC
V_coilGap > 3 V_DC
f_COIL
100
125
150
kHz
T_FGAP0
10
T_FGAP1
1
50
µs
50
µs
Battery to field switch delay
Field to battery switch delay
V_Batt = 6.5 V
t_BFS
1000
µs
t_FBS
5
10
30
ms
13
4688B–RFID–12/04