TA = 25°C, VCC
參數(shù)資料
型號(hào): LTC1387CG#TRPBF
廠商: Linear Technology
文件頁數(shù): 6/12頁
文件大?。?/td> 0K
描述: IC TXRX RS232/RS485 5VSNGL20SSOP
標(biāo)準(zhǔn)包裝: 1,800
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 2/2
規(guī)程: RS232,RS485
電源電壓: 5V
安裝類型: 表面貼裝
封裝/外殼: 20-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 20-SSOP
包裝: 帶卷 (TR)
3
LTC1387
DC ELECTRICAL CHARACTERISTICS
TA = 25°C, VCC = 5V, C1 = C2 = C3 = C4 = 0.1F (Notes 2, 3), unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RS485 Receiver (485/232 = High, ON = RXEN = High)
VTH
Differential Input Threshold Voltage
– 7V
≤ VCM ≤ 12V
q
– 0.20
0.20
V
VTH
Input Hysteresis
VCM = 0V
40
mV
IIN
Input Current (A, B)
VIN = 12V
q
1mA
VIN = – 7V
q
– 0.8
mA
RIN
Input Resistance
– 7V
≤ VIN ≤ 12V
q
12
24
k
RS232 Receiver (485/232 = Low, ON = RXEN = High)
VTH
Receiver Input Voltage Threshold
Input Low Threshold
q
0.8
V
Input High Threshold
q
2.4
V
VTH
Receiver Input Hysteresis
0.6
V
RIN
Receiver Input Resistance
VIN = ±10V
3
5
7
k
Receiver Output (ON = RXEN = High)
VOH
Receiver Output High Voltage
IO = – 3mA, VIN = 0V, 485/232 = Low
q
3.5
4.6
V
VOL
Receiver Output Low Voltage
IO = 3mA, VIN = 3V, 485/232 = Low
q
0.2
0.4
V
IOSR
Short-Circuit Current
0V
≤ VO ≤ VCC
q
785
mA
IOZR
Three-State Output Current
RXEN = 0V
q
±0.1
±10
A
Power Supply Generator
VDD
VDD Output Voltage
No Load, ON = DXEN = RXEN = High
8
V
IDD = – 5mA, ON = DXEN = RXEN = High
7
V
VEE
VEE Output Voltage
No Load, ON = DXEN = RXEN = High
– 7.7
V
IEE = 5mA, ON = DXEN = RXEN = High
– 7.0
V
Power Supply
ICC
VCC Supply Current
No Load, ON = DXEN = RXEN = High
q
725
mA
Shutdown, ON = DXEN = RXEN = 0V
q
5
100
A
AC ELECTRICAL CHARACTERISTICS
TA = 25°C, VCC = 5V, C1 = C2 = C3 = C4 = 0.1F (Notes 2, 3), unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RS232 Mode (ON = DXEN = RXEN = High, 485/232 = Low)
SR
Slew Rate
Figure 4, RL = 3k, CL = 15pF
q
30
V/
s
Figure 4, RL = 3k, CL = 1000pF
q
4V/
s
tT
Transition Time
Figure 4, RL = 3k, CL = 2500pF
q
0.22
1.9
3.1
s
tPLH
Driver Input to Output
Figures 4, 10, RL = 3k, CL = 15pF
q
0.6
4
s
tPHL
Driver Input to Output
Figures 4, 10, RL = 3k, CL = 15pF
q
0.6
4
s
tPLH
Receiver Input to Output
Figures 5, 11
q
0.3
6
s
tPHL
Receiver Input to Output
Figures 5, 11
q
0.4
6
s
RS485 Mode (Fast Slew Rate, ON = DXEN = High, 485/232 = High, SLEW = High)
tPLH
Driver Input to Output
Figures 2, 7, RL = 54, CL = 100pF
q
15
40
70
ns
tPHL
Driver Input to Output
Figures 2, 7, RL = 54, CL = 100pF
q
15
40
70
ns
tSKEW
Driver Output to Output
Figures 2, 7, RL = 54, CL = 100pF
q
515
ns
tr, tf
Driver Rise or Fall Time
Figures 2, 7, RL = 54, CL = 100pF
q
315
40
ns
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