For more information www.linear.com/LTC485 ELECTRICAL CHARACTERISTICS Note 1: Stresses b" />
參數(shù)資料
型號(hào)： LTC485CS8#TRPBF
廠商： Linear Technology
文件頁數(shù)： 8/14頁
文件大?。?/td> 0K
描述： IC TXRX INTRFC RS485 LOPWR 8SOIC
標(biāo)準(zhǔn)包裝： 2,500
類型： 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù)： 1/1
規(guī)程： RS485
電源電壓： 4.75 V ~ 5.25 V
安裝類型： 表面貼裝
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 8-SOIC
包裝： 帶卷 (TR)
LTC485
3
485fk
For more information www.linear.com/LTC485
ELECTRICAL CHARACTERISTICS
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: All currents into device pins are positive; all currents out ot device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5%, unless otherwise noted. (Notes 2 and 3)
SWITCHING CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5%, unless otherwise noted. (Notes 2 and 3)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ICC
Supply Current
No Load, Pins 2, 3, 4 = 0V or 5V
Outputs Enabled
Outputs Disabled
l
500
300
900
500
μA
IOSD1
Driver Short-Circuit Current, VOUT = HIGH VO = – 7V
l
35
100
250
mA
IOSD2
Driver Short-Circuit Current, VOUT = LOW VO = 10V
l
35
100
250
mA
IOSR
Receiver Short-Circuit Current
0V ≤ VO ≤ VCC
l
7
85
mA
tPLH
Driver Input to Output
RDIFF = 54Ω, CL1 = CL2 = 100pF,
(Figures 3 and 5)
l
10
30
50
ns
tPHL
Driver Input to Output
l
10
30
50
ns
tSKEW
Driver Output to Output
l
5
10
ns
tr, tf
Driver Rise or Fall Time
l
3
15
25
ns
tZH
Driver Enable to Output High
CL = 100pF (Figures 4 and 6) S2 Closed
l
40
70
ns
tZL
Driver Enable to Output Low
CL = 100pF (Figures 4 and 6) S1 Closed
l
40
70
ns
tLZ
Driver Disable Time from Low
CL = 15pF (Figures 4 and 6) S1 Closed
l
40
70
ns
tHZ
Driver Disable Time from High
CL = 15pF (Figures 4 and 6) S2 Closed
l
40
70
ns
tPLH
Receiver Input to Output
RDIFF = 54Ω, CL1 = CL2 = 100pF,
(Figures 3 and 7)
l
30
90
200
ns
tPHL
l
30
90
200
ns
tSKD
|tPLH – tPHL| Differential Receiver Skew
l
13
ns
tZL
Receiver Enable to Output Low
CRL = 15pF (Figures 2 and 8) S1 Closed
l
20
50
ns
tZH
Receiver Enable to Output High
CRL = 15pF (Figures 2 and 8) S2 Closed
l
20
50
ns
tLZ
Receiver Disable from Low
CRL = 15pF (Figures 2 and 8) S1 Closed
l
20
50
ns
tHZ
Receiver Disable from High
CRL = 15pF (Figures 2 and 8) S2 Closed
l
20
50
ns
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIL
Input Low Voltage
DE, DI, RE
l
0.8
V
IIN1
Input Current
DE, DI, RE
l
±2
μA
IIN2
Input Current (A, B)
DE = 0, VCC = 0V or 5.25V
VIN = 12V
C-, I-Grade
VIN = –7V
l
1
–0.8
mA
M-Grade
VIN = 12V
VIN = –7V
l
2
–1.6
mA
VTH
Differential Input Threshold Voltage for Receiver –7V ≤ VCM ≤ 12V
l
–0.2
0.2
V
ΔVTH
Receiver Input Hysteresis
VCM = 0V
l
70
mV
VOH
Receiver Output High Voltage
IO = –4mA, VID = 200mV
l
3.5
V
VOL
Receiver Output Low Voltage
IO = 4mA, VID = –200mV
l
0.4
V
IOZR
Three-State (High Impedance) Output Current
at Receiver
VCC = Max, 0.4V ≤ VO ≤ 2.4V
l
±1
μA
RIN
Receiver Input Resistance
–7V ≤ VCM ≤ 12V (C-, I-Grade)
(M-Grade)
l
12
6
kΩ
Note 3: All typicals are given for VCC = 5V and TA = 25°C.
Note 4: The LTC485 is guaranteed by design to be functional over a supply
voltage range of 5V ±10%. Data sheet parameters are guaranteed over the
tested supply voltage range of 5V ±5%.
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