參數(shù)資料
型號(hào)： LTC491IS#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 5/12頁(yè)
文件大小： 0K
描述： IC TXRX RS485 LOW POWER 14-SOIC
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： RS422，RS485
電源電壓： 4.75 V ~ 5.25 V
安裝類型： 表面貼裝
封裝/外殼： 14-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 14-SOIC
包裝： 帶卷 (TR)
LTC491
2
491fa
A
U
G
W
A
W
U
W
A
R
BSOLUTEXI
TI
S
WU
U
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
LTC491CN
LTC491CS
LTC491IN
LTC491IS
(Note 1)
Supply Voltage (VCC) ............................................... 12V
Control Input Voltages .................... –0.5V to VCC + 0.5V
Control Input Currents .......................... –50mA to 50mA
Driver Input Voltages ...................... –0.5V to VCC + 0.5V
Driver Input Currents ............................ –25mA to 25mA
Driver Output Voltages ..........................................
±14V
Receiver Input Voltages .........................................
±14V
Receiver Output Voltages ............... –0.5V to VCC + 0.5V
Operating Temperature Range
LTC491C ................................................. 0
°C to 70°C
LTC491I .............................................. – 40
°C to 85°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5%
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VOD1
Differential Driver Output Voltage (Unloaded)
IO = 0
q
5V
VOD2
Differential Driver Output Voltage (With load)
R = 50
; (RS422)
q
2V
R = 27
; (RS485) (Figure 1)
q
1.5
5
V
VOD
Change in Magnitude of Driver Differential Output
R = 27
or R = 50 (Figure 1)
q
0.2
V
Voltage for Complementary Output States
VOC
Driver Common Mode Output Voltage
q
3V
VOC
Change in Magnitude of Driver Common Mode
q
0.2
V
Output Voltage for Complementary Output States
VIH
Input High Voltage
D, DE, REB
q
2.0
V
VIL
Input Low Voltage
q
0.8
V
lIN1
Input Current
q
±2
A
lIN2
Input Current (A, B)
VCC = 0V or 5.25V
VIN = 12V
q
1.0
mA
VIN = –7V
q
– 0.8
mA
VTH
Differential Input Threshold Voltage for Receiver
– 7V
≤VCM ≤12V
q
– 0.2
0.2
V
VTH
Receiver Input Hysteresis
VCM = 0V
q
70
mV
VOH
Receiver Output High Voltage
IO = –4mA, VID = 0.2V
q
3.5
V
VOL
Receiver Output Low Voltage
IO = 4mA, VID = –0.2V
q
0.4
V
IOZR
Three-State Output Current at Receiver
VCC = Max 0.4V ≤ VO ≤ 2.4V
q
±1
A
ICC
Supply Current
No Load; D = GND,
Outputs Enabled
q
300
500
A
or VCC
Outputs Disabled
q
300
500
A
RIN
Receiver Input Resistance
– 7V
≤VCM ≤12V
q
12
k
IOSD1
Driver Short Circuit Current, VOUT = High
VO = –7V
q
100
250
mA
IOSD2
Driver Short Circuit Current, VOUT = Low
VO = 12V
q
100
250
mA
IOSR
Receiver Short Circuit Current
0V
≤VO ≤VCC
q
785
mA
IOZ
Driver Three-State Output Current
VO = – 7V to 12V
q
±2
±200
A
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
NC
N PACKAGE
14-LEAD PDIP
Y
NC
Z
B
NC
VCC
D
GND
R
REB
DE
A
R
D
TJMAX = 100°C, θJA = 90°C/W (N)
TJMAX = 100°C, θJA = 110°C/W (S)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS
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