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參數(shù)資料
| 型號： | LT1785 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 60V Fault Protected Half-Duplex,RS485/RS422 Transceivers(60V,故障保護,半雙工RS485/RS422收發(fā)器) |
| 中文描述： | 60V的故障保護半雙工，RS485/RS422收發(fā)器（60V的故障保護，半雙工RS485/RS422收發(fā)器） |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 200K |
| 代理商： | LT1785 |
5
LT1785/LT1785A
LT1791/LT1791A
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
Supply Current vs Temperature
Driver Propagation Delay
vs Temperature
LT1791 Driver Output Leakage
DE = 0V
TEMPERATURE (
°
C)
–40
1000
900
800
700
600
500
400
300
200
100
0
0
40
60
1785/91 G04
–20
20
80
100
HL
LH
1mA/DIV
–60V
60V
LT1791 Receiver Input Current
vs V
IN
200
μ
A/DIV
–60V
60V
V
IN
1785/91 G06
–60V
60V
1mA/DIV
V
A,
V
B
1785/91 G07
V
OUT
1785/91 G05
TEMPERATURE (
°
C)
–40
I
C
7
6
5
4
3
2
1
0
0
40
60
1785/91 G08
–20
20
80
100
RECEIVER ONLY
STANDBY
DRIVER AND
RECEIVER ON
Receiver Propagation Delay
vs Differential Input Voltage
LT1785 Input Characteristics
Pins A or B; DE = RE = 0V
V
IN
DIFFERENTIAL (V)
0
D
700
600
500
400
300
200
100
0
1785/91 G09
2
5
1
3
4
HL V
CM
= 12V
HL V
CM
= –7V
LH V
CM
= –7V
LH V
CM
= 12V
PI
FU
CTIO
N
S
U
U
RO:
Receiver Output. TTL level logic output. If the receiver
is active (RE pin low), RO is high if receiver input A
≥
B by
200mV. If A
≤
B by 200mV, then RO will be low. RO
assumes a high impedance output state when RE is high
or the part is powered off. RO is protected from output
shorts from ground to 6V.
RE:
Receiver Output Enable. TTL level logic input. A logic
low on RE enables normal operation of the receiver output
RO. A logic high level at RE places the receiver output pin
RO into a high impedance state. If receiver enable RE and
driver enable DE are both in the disable state, the circuit
goes to a low power shutdown state. Placing either RE or
DE into its active state brings the circuit out of shutdown.
Shutdown state is not entered until a 3
μ
s delay after both
RE and DE are disabled, allowing for logic skews in
toggling between transmit and receive modes of opera-
tion. For CAN bus applications, RE should be tied low to
prevent the circuit from entering shutdown.
DE:
Driver Output Enable. TTL level logic input. A logic
high on DE enables normal operation of the driver outputs
(Y and Z on LT1791, A and B on LT1785). A logic low level
at DE places the driver output pins into a high impedance
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1785_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:60V Fault Protected RS485/RS422 Transceivers |
| LT1785A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:60V Fault Protected RS485/RS422 Transceivers |
| LT1785AC | 制造商:LINER 制造商全稱:Linear Technology 功能描述:60V Fault Protected RS485/RS422 Transceivers |
| LT1785ACN8 | 功能描述:IC TXRX 60V RS485/RS422 8DIP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發(fā)器 系列:- 標準包裝:27 系列:- 類型:收發(fā)器 驅動器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC 包裝:管件 |
| LT1785ACN8#PBF | 功能描述:IC TXRX 60V RS485/RS422 8DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅動器，接收器，收發(fā)器 系列:- 標準包裝:27 系列:- 類型:收發(fā)器 驅動器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC 包裝:管件 |
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