Operating Temperature Range (Note 4)....– 40°C to 85°C
Storage Temperature Range .................. –65°C to 125°C
SCLK
D
OUT
C
24 23 22 21 20 19
DV
CC
1
DATA 2
R
IN
3
SYNC 4
ASYNC 5
FAULT
6
D
IN
LD
UF PACKAGE
24-LEAD (4mm
×
4mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 160°C/W
EXPOSED PAD (PIN #) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC4556EUF#PBF
TAPE AND REEL
LTC4556EUF#TRPBF
PART MARKING
4556
PACKAGE DESCRIPTION
24‑Lead (4mm x 4mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
elecTrical characTerisTics
PARAMETER
Input Power Supply
V
BATT
Operating Voltage
I
VBATT
Operating Current
I
VBATT
Shutdown Current
DV
CC
Operating Voltage
I
DVCC
Operating Current
I
DVCC
Shutdown Current
Charge Pump
R
OLCP
5V Mode Open‑Loop
Output Resistance
CPO Turn On Time
V
CC
= 5V, I
CC
= 0µA
CONDITIONS
The
l
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.
MIN
l
l
l
l
l
l
C
+
TYP
MAX
5.5
UNITS
V
µA
µA
V
µA
µA
Ω
ms
2.7
250
0.5
1.7
5
0.2
8.2
0.6
400
1.75
5.5
25
1.5
17
1.5
No Card Present, V
CPO
= 0V
V
BATT
= 3.075V, I
CPO
= I
CC
= 60mA, (Note 3)
I
CC
= 0mA, 10% to 90%
l
l
4556fb
2
For more information
www.linear.com/LTC4556
LTC4556
elecTrical characTerisTics
PARAMETER
Smart Card Supply
V
CC
Output Voltage
V
CC
Turn On‑Time
Undervoltage Detection
Overcurrent Detection
Smart Card Detection
Debounce Time (
Deactivation Time (
PRES to
D7)
V
PRES
= 0
RST to V
CC
= 0.4V)
I
CC
= 0mA, CV
CC
= 1µF
Sink Current = –200µA
Source Current = 200µA
Loaded with 50pF 10% to 90%
,
l
l
l
The
l
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.
CONDITIONS
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
l
l
l
l
l
l
MIN
4.65
2.75
1.65
–9
60
15
TYP
5.0
3.0
1.8
0.8
–5
110
32
1
100
MAX
5.35
3.25
1.95
1.5
–2.5
150
60
2.5
250
0.2
UNITS
V
V
V
ms
%
mA
ms
µA
µs
V
V
ns
MHz
PRES Pull‑Up Current
CLK (Non-Bidirectional Modes)
Low Level Output Voltage (V
OL
), (Note 2)
High Level Output Voltage (V
OH
), (Note 2)
Rise/Fall Time, (Note 2)
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)
Low Level Output Voltage (V
OL
), (Note 2)
High Level Output Voltage (V
OH
), (Note 2)
Rise/Fall Time, (Note 2)
Short Circuit Current, (Note 2)
Low Level Output Voltage (V
OL
)
High Level Output Voltage (V
OH
)
Rise/Fall Time
Low Input Threshold (V
IL
)
High Input Threshold (V
IH
)
Input Current (I
IH
/I
IL
)
D
OUT
Low Level Output Voltage (V
OL
)
High Level Output Voltage (V
OH
)
UNDERV
Threshold
Leakage Current
l
l
l
l
V
CC
– 0.2
16
10
0.2
V
CC
– 0.2
100
0.3
0.85 • V
CC
500
5
10
0.3
0.8 • DV
CC
500
0.15 • DV
CC
–1
1
0.3
DV
CC
– 0.3
1.17
1.23
1.29
50
Sink Current = –200µA
Source Current = 200µA
Loaded with 50pF 10% to 90%
,
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%
,
V
DATA
= 0V or V
SYNC
= 0V
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
l
l
l
V
V
ns
V
V
ns
mA
V
V
ns
V
V
µA
V
V
V
nA
I/O, CLK (CLK Specifications in Bidirectional Mode Only)
l
l
l
l
DATA, SYNC (SYNC Specifications in Bidirectional Mode Only)
l
l
l
R
IN
, D
IN
, SCLK,
LD,
SYNC, ASYNC (SYNC Specifications for Non-Bidirectional Mode)
l
l
0.85 • DV
CC
l
Sink Current = –200µA
Source Current = 200µA
l
l
l
V
UNDERV
= 3.3V
l
4556fb
For more information
www.linear.com/LTC4556
3
LTC4556
elecTrical characTerisTics
PARAMETER
FAULT
Low Level Output Voltage (V
OL
)
Leakage Current
Serial Port Timing
t
DS
t
DH
t
DD
t
L
t
H
t
CL
t
LC
t
LFC
D
IN
Valid to SCLK Setup
D
IN
Valid to SCLK Hold
D
OUT
Output Delay
SCLK Low Time
SCLK High Time
SCLK to
LD
LD
to SCLK
LD
Falling to SCLK
C
LOAD
= 15pF
8
8
15
50
50
50
0
50
60
ns
ns
ns
ns
ns
ns
ns
ns
Sink Current = –200µA
V
FAULT
= 5.5V
l
l
The
l
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.
CONDITIONS
MIN
TYP
0.005
MAX
0.3
1
UNITS
V
µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
This specification applies to all three smart card voltage classes:
1.8V, 3V and 5V.
Note 3:
R
OLCP
≡
(2V
BATT
– V
CPO
)/I
CPO
; V
CPO
will depend upon total load
(I
CC
) and minimum supply voltage V
BATT
. See Figure 6.
Note 4:
The LTC4556E 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
