LTC1955EUH Linear Technology, LTC1955EUH Datasheet - Page 2

• Manufacturer Part Number: LTC1955EUH
• Description: IC INTERFACE DL SMART CARD 32QFN
• Manufacturer: Linear Technology

Specifications of LTC1955EUH

• Controller Type: Smart Card Interface
• Interface: 4-Wire Serial
• Voltage - Supply: 1.7 V ~ 5.5 V
• Current - Supply: 10µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ABSOLUTE MAXIMUM RATINGS
LTC1955
(Note 1)
V
UNDERV to GND ....................................... –0.3V to 6.0V
PRES A/PRES B, DATA, R
LD, D
I/O A ............................................ –0.3V to (V
I/O B ............................................ –0.3V to (V
I
V
Operating Temperature Range (Note 4).... –40°C to 85°C
Junction Temperature ........................................... 125°C
Storage Temperature Range ................... –65°C to 125°C
ORDER INFORMATION
LEAD FREE FINISH
LTC1955EUH#PBF
LTC1955IUH#PBF
LEAD BASED FINISH
LTC1955EUH
LTC1955IUH
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
PARAMETER
Input Power Supply
V
I
I
DV
2
VCCA
PVBATT
PVBATT
BATT
BATT
CCA
CC
Operating Voltage
Operating Voltage
/V
/IV
, DV
IN
+ I
+ I
CCB
, SCLK to GND .................–0.3V to (DV
SVBATT
SVBATT
CCB
CC
Short-Circuit Duration ..................... Indefi nite
.............................................................80mA
, CPO, FAULT,
Operating Current
Shutdown Current
TAPE AND REEL
LTC1955EUH#TRPBF
LTC1955IUH#TRPBF
TAPE AND REEL
LTC1955EUH#TR
LTC1955IUH#TR
IN
, SYNC, ASYNC,
CONDITIONS
V
V
No Cards Present. V
CCA
CCA
http://www.linear.com/leadfree/
PART MARKING*
1955
1955
PART MARKING*
1955
1955
= 5V, V
= V
CCA
CCB
http://www.linear.com/tapeandreel/
A
CCB
CC
= 25°C. V
CCB
= 5V, I
+ 0.3V)
+ 0.3V)
+ 0.3V)
The
= 0V, I
CCA
CPO
l
PVBATT
CCA
= I
denotes the specifi cations which apply over the full operating
= 0V
CCB
= 0μA
PIN CONFIGURATION
= V
= 0μA
SVBATT
PACKAGE DESCRIPTION
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
PACKAGE DESCRIPTION
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
PRES A
= 3.3V, DV
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
RST A
CLK A
DV
I/O A
V
C8A
C4A
CCA
CC
1
2
3
4
5
6
7
8
32-LEAD (5mm 5mm) PLASTIC QFN
32
9 10 11 12
CC
l
l
l
l
l
T
31 30 29 28 27 26 25
JMAX
= 3.3V, unless otherwise noted.
= 125°C, θ
UH PACKAGE
TOP VIEW
MIN
2.7
1.7
33
13 14 15 16
JA
= 34°C/W
0.75
TYP
250
350
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
24
23
22
21
20
19
18
17
FAULT
UNDERV
NC/NO
PRES B
I/O B
RST B
CLK B
V
MAX
1.75
400
500
CCB
5.5
5.5
UNITS
1955fb
μA
μA
μA
V
V