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LTC1756 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC1756
Description  Smart Card Interface
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1756 Datasheet(HTML) 3 Page - Linear Technology

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LTC1756
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full specified
temperature range, otherwise specificatons are at TA = 25°C. VIN = 2.7V to 5.5V, unless otherwise noted.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1756 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 sink up to 250
µA
sourced by the internal current sources.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RIN, CIN, PWR, 5V/3V
High Input Voltage Threshold (VIH)
q
0.7 • VIN
0.5 • VIN
V
Low Input Voltage Threshold (VIL)
q
0.5 • VIN
0.2 • VIN
V
Input Current (IIH/IIL)
q
–1
1
µA
READY, CARD
Pull-Up Current (IOH)
q
250
nA
Low Level Output Voltage (VOL)
Sink Current = – 20
µA
q
0.3
V
Smart Card Input/Output I/O, VCC = 3V or 5V
High Input Voltage Threshold (VIH)IIH(MAX) = ±20µA
q
0.6 • VCC
0.5 • VCC
V
Low Input Voltage Threshold (VIL)IIL(MAX) = 1mA
q
0.5 • VCC
0.8
V
High Level Output Voltage (VOH)
Source Current = 20
µA, DATA = VIN
q
0.8 • VCC
V
Low Level Output Voltage (VOL)
Sink Current = – 1mA, DATA = 0V (Note 3)
q
0.3
V
Rise/ Fall Time
Loaded with 30pF, 10% to 90%
q
0.5
µs
Short-Circuit Current
Shorted to VCC
q
3.5
5
mA
CLK
High Level Output Voltage (VOH)
Source Current = 100
µA
q
VCC – 0.5
V
Low Level Output Voltage (VOL)
Sink Current = – 200
µA
q
0.3
V
CLK Rise/Fall Time
CLK Loaded with 30pF
q
16
ns
CLK Frequency
CLK Loaded with 30pF
q
5
MHz
RST
High Level Output Voltage (VOH)
Source Current = 200
µA
q
0.8 • VCC
V
Low Level Output Voltage (VOL)
Sink Current = – 200
µA
q
0.3
V
RST Rise/Fall Time
Loaded with 30pF
q
0.5
µs
PRES
High Input Voltage Threshold (VIH)
q
0.7 • VIN
0.5 • VIN
V
Low Input Voltage Threshold (VIL)
q
0.5 • VIN
0.2 • VIN
V
PRES Pull-Up Current
VPRES = 0V
q
0.5
1
µA
PRES Debounce Time
Proportional to the 0.68
µF Charge Pump Capacitor
q
40
80
ms



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