LTC4556 Datasheet, PDF (3/20 Pages) Linear Technology – Smart Card Interface with Serial Control

LTC4556
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_BATT = 3.3V, DV_CC = 3.3V unless otherwise noted.
SYMBOL
CONDITIONS
Smart Card Supply
V_CC Output Voltage
V_CC Turn On-Time
Undervoltage Detection
5V Mode, 0 < I_CC < 60mA
3V Mode, 0 < I_CC < 50mA
1.8V Mode, 0 < I_CC < 30mA
I_CC = 0mA, 10% to 90%
Relative to Nominal Output
Overcurrent Detection
Smart Card Detection
Debounce Time ( PRES to D7)
PRES Pull-Up Current
Deactivation Time ( RST to V_CC = 0.4V)
CLK (Non-Bidirectional Modes)
V_PRES = 0
I_CC = 0mA, C_VCC = 1µF
Low Level Output Voltage (V_OL), (Note 2)
High Level Output Voltage (V_OH), (Note 2)
Rise/Fall Time, (Note 2)
Sink Current = – 200µA
Source Current = 200µA
Loaded with 50pF, 10% to 90%
CLK Frequency, (Note 2)
RST, C4, C8
Low Level Output Voltage (V_OL), (Note 2)
High Level Output Voltage (V_OH), (Note 2)
Rise/Fall Time, (Note 2)
Sink Current = – 200µA
Source Current = 200µA
Loaded with 50pF, 10% to 90%
I/O, CLK (CLK Specifications in Bidirectional Mode Only)
Low Level Output Voltage (V_OL), (Note 2)
High Level Output Voltage (V_OH), (Note 2)
Rise/Fall Time, (Note 2)
Sink Current = –1mA (V_DATA = 0V or V_SYNC = 0V)
Source Current = 20µA (V_DATA = V_DVCC or
V_SYNC = V_DVCC)
Loaded with 50pF, 10% to 90%
Short Circuit Current, (Note 2)
V_DATA = 0V or V_SYNC = 0V
DATA, SYNC (SYNC Specifications in Bidirectional Mode Only)
Low Level Output Voltage (V_OL)
High Level Output Voltage (V_OH)
Rise/Fall Time
Sink Current = – 500µA (V_I/O = 0V or V_CLK = 0V)
Source Current = 20µA (V_I/O = V_CC or V_CLK = V_CC)
Loaded with 50pF
R_IN, D_IN, SCLK, LD, SYNC, ASYNC (SYNC Specifications for Non-Bidirectional Mode)
Low Input Threshold (V_IL)
High Input Threshold (V_IH)
Input Current (I_IH/I_IL)
D_OUT
Low Level Output Voltage (V_OL)
Sink Current = – 200µA
High Level Output Voltage (V_OH)
Source Current = 200µA
UNDERV
Threshold
Leakage Current
V_UNDERV = 3.3V
MIN
TYP
MAX UNITS
q 4.65
5.0
5.35
V
q 2.75
3.0
3.25
V
q 1.65
1.8
1.95
V
q
0.8
1.5
ms
q
–9
–5
– 2.5
%
q
60
110
150
mA
q
15
q
q
32
60
ms
1
2.5
µA
100
250
µs
q
q V_CC – 0.2
q
q
10
0.2
V
V
16
ns
MHz
q
q V_CC – 0.2
q
0.2
V
V
100
ns
q
q 0.85 • V_CC
q
q
5
0.3
V
V
500
ns
10
mA
q
q 0.8 • DV_CC
q
0.3
V
V
500
ns
q
q 0.85 • DV_CC
q
–1
0.15 • DV_CC
V
V
1
µA
q
q DV_CC – 0.3
0.3
V
V
q 1.17
1.23
1.29
V
q
50
nA
4556f
3