![](http://datasheet.mmic.net.cn/Linear-Technology/LTC1555LEGN-TR_datasheet_105394/LTC1555LEGN-TR_3.png)
LTC1555L
3
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Controller Inputs/Outputs (DVCC = 3V)
Input Current (IIH /IIL)
M0, M1, M2, RIN, CIN
q
–100
100
nA
Input Current (IIH /IIL)
DDRV
q
–5
5
A
High Level Input Current (IIH)
DATA
q
–20
20
A
Low Level Input Current (IIL)
DATA
q
1mA
High Input Voltage Threshold (VIH)
M0, M1, M2, RIN, CIN, DDRV
q
0.7
× DVCC
V
DATA
q
DVCC – 0.6
V
Low Input Voltage Threshold (VIL)
M0, M1, M2, RIN, CIN, DDRV
q
0.2
× DVCC
V
DATA
q
0.4
V
High Level Output Voltage (VOH)
DATA Source Current = 20
A I/O = VCC
q
0.7
× DVCC
V
Low Level Output Voltage (VOL)
DATA Sink Current = –200
A I/O = 0V (Note 3)
q
0.4
V
DATA Pull-Up Resistance
Between DATA and DVCC
q
13
20
30
k
DATA Output Rise/Fall Time
DATA Loaded with 30pF
q
1.3
2
s
SIM Inputs/Outputs (VCC = 3V or 5V)
I/O High Input Voltage Threshold (VIH)IIH(MAX) = ±20A
q
0.7
× VCC
V
I/O Low Input Voltage Threshold (VIL)IIL(MAX) = 1mA
q
0.4
V
High Level Output Voltage (VOH)
I/O, Source Current = 20
A DATA or DDRV = DVCC
q
0.8
× VCC
V
Low Level Output Voltage (VOL)
I/O, Sink Current = –1mA DATA or DDRV = 0V (Note 3)
q
0.4
V
High Level Output Voltage (VOH)
RST, CLK Source Current = 20
A
q
0.9
× VCC
V
Low Level Output Voltage (VOL)
RST, CLK Sink Current = –200
A
q
0.4
V
I/O Pull-Up Resistance
Between I/O and VCC
q
6.5
10
14
k
SIM Timing Parameters (DVCC = 3V, VCC = 5V)
CLK Rise/Fall Time
CLK Loaded with 30pF, VCC = 3V, or 5V
q
18
ns
RST, I/O Rise/Fall Time
RST, I/O Loaded with 30pF
q
1
s
CLK Frequency
CLK Loaded with 30pF
q
5
MHz
VCC Turn-On Time
COUT = 2.2F, IVCC = 0
0.5
ms
VCC Discharge Time to 1V
IVCC = 0, VCC = 5V, COUT = 2.2F
0.5
ms
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1555LEGN is guaranteed to meet performance
specifications from 0
°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: The DATA and I/O pull-down drivers must also sink current
sourced by the internal pull-up resistor.
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (VIN = 2.6V to 6V, DVCC = 1.425V to 4.4V, controller digital pins tied to
DVCC, SIM digital pins floating, C1 = 0.1F, COUT = 2.2F unless otherwise noted)
ELECTRICAL CHARACTERISTICS