17
4688D–RFID–03/07
U3280M
9. AC Characteristics
Supply voltage V
DD
= 1.8V to 6.5V, V
SS
= 0V, 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 f
SCL
0 100 kHz
Clock low time t
LOW
4.7 µs
Clock high time t
HIGH
4.0 µs
SDA and SCL rise time t
R
1000 ns
SDA and SCL fall time t
F
300 ns
START condition setup time t
SUSTA
4.7 µs
START condition hold time t
HDSTA
4.0 µs
Data input setup time t
SUDAT
250 ns
Data input hold time t
HDDAT
0ns
STOP condition setup time t
SUSTO
4.7 µs
Bus free time t
BUF
4.7 µs
Input filter time t
I
100 ns
Data output hold time t
DH
300 1000 ns
Coil Inputs
Coil frequency f
COIL
100 125 150 kHz
Gap Detection
Delay field off to GAP = 0 V
coilGap
< 0.7 V
DC
T
FGAP0
10 50 µs
Delay field on to GAP = 1 V
coilGap
> 3 V
DC
T
FGAP1
150µs
Power Management
Battery to field switch delay t
BFS
1000 µs
Field to battery switch delay V
Batt
= 6.5V t
FBS
51030ms
EEPROM
Endurance Erase/write cycles E
D
500000 Cycles
Data erase/write cycle time For 16-bit access t
DEW
912ms
Data retention time T
amb
= 25°Ct
DR
10 years
Power up to read operation t
PUR
0.2 ms
Power up to write operation t
PUw
0.2 ms
Reset
Power-on reset V
DDrise
= 0 to 2V t
rise
10 ms
NRST VIl < 0.2 V
DD
t
res
1µs
