elecTrical characTerisTics The l denotes t" />
參數(shù)資料
型號: LTC1955EUH#TRPBF
廠商: Linear Technology
文件頁數(shù): 17/22頁
文件大小: 0K
描述: IC INTERFACE DL SMART CARD 32QFN
標(biāo)準(zhǔn)包裝: 2,500
控制器類型: 智能卡接口
接口: 4 線串行
電源電壓: 1.7 V ~ 5.5 V
電流 - 電源: 10µA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 32-QFN 裸露焊盤(5x5)
包裝: 帶卷 (TR)
LTC1955
4
1955fd
For more information www.linear.com/LTC1955
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VPVBATT = VSVBATT = 3.3V, DVCC = 3.3V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
DOUT
Low Level Output Voltage (VOL)
Sink Current = –200A
l
0.3
V
High Level Output Voltage (VOH)
Source Current = 200A
l
DVCC – 0.3
V
UNDERV
Threshold
l
1.17
1.23
1.29
V
Leakage Current
VUNDERV = 3.3V
l
50
nA
FAULT
Low Level Output Voltage (VOL)
Sink Current = –200A
l
0.005
0.3
V
Leakage Current
VFAULT = 5.5V
l
1
A
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: ROLCP @ (2VBATT – VCPO)/ICPO; VCPO will depend upon total load
(ICCA + ICCB) and minimum supply voltage VBATT. See Figure 5.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Serial Port Timing
tDS
DIN Valid to SCLK Setup
l
8
ns
tDH
DIN Valid to SCLK Hold
l
8
ns
tDD
DOUT Output Delay
CLOAD = 15pF
l
15
60
ns
tL
SCLK Low Time
l
50
ns
tH
SCLK High Time
l
50
ns
tCL
SCLK to LD
l
50
ns
tLC
LD to SCLK
l
0
ns
tLFC
LD Falling to SCLK
l
50
ns
Note 4: The LTC1955E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
ambient temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC1955I is guaranteed to
meet performance specifications over the full –40°C to 85°C temperature
range.
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