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參數(shù)資料
| 型號(hào)： | MAX3471EUA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 1.6レA, RS-485/RS-422, Half-Duplex, Differential Transceiver for Battery-Powered Systems |
| 中文描述： | LINE TRANSCEIVER, PDSO8 |
| 封裝： | UMAX-8 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 86K |
| 代理商： | MAX3471EUA |
_______________Detailed Desc ription
The MAX3471 half-duplex transceiver consumes only
1.6μA from a single +3.6V supply. Its wide 2.5V to 5.5V
supply voltage guarantees operation over the lifetime of
a lithium battery. This device contains one driver and
one receiver. Its true fail-safe receiver input guarantees
a logic-high receiver output when the receiver inputs
are open or shorted, or when they are connected to a
terminated transmission line with all drivers disabled.
Reduced-slew-rate drivers minimize EMI and reduce
reflections caused by improperly terminated cables,
allowing error-free data transmission up to 64kbps.
Rec eiver Input Filtering
The MAX3471 receiver operates at up to 64kbps and
incorporates input filtering in addition to input hystere-
sis. This filtering enhances noise immunity when differ-
ential signals have very slow rise and fall times.
The MAX3471 guarantees a logic-high receiver output
when the receiver inputs are shorted or open, or when
they are connected to a terminated transmission line
with all drivers disabled. This is accomplished by set-
ting the receiver threshold between -50mV and
-450mV. If the differential receiver input voltage (A-B) is
greater than or equal to -50mV, RO is a logic high. If
A-B is less than or equal to -450mV, RO is a logic low.
In the case of a terminated bus with all transmitters dis-
abled, the receiver’s differential input voltage is pulled
to 0V by the termination. With the MAX3471’s receiver
thresholds, this results in a logic high with a 50mV mini-
mum noise margin.
M
1.6μA, RS-485/RS-422, Half-Duplex,
Differential Transceiver for Battery-Powered Systems
6
_______________________________________________________________________________________
______________________________________________________________Pin Desc ription
RECEIVER PROPAGATION DELAY
B
DI
(2V/div)
(2V/div)
A-B
(2V/div)
R
(2V/div)
A
1
μ
s/div
DRIVER PROPAGATION DELAY
MAX3471toc18
B
DI
(2V/div)
(2V/div)
A-B
(1V/div)
A
400ns/div
R = 1.5k
, C
L
= 100pF
Ground
Inverting Driver Output and Inverting Receiver Input
Positive Supply: +2.5V
≤
V
CC
≤
+5.5V
GND
A
B
V
CC
5
6
7
8
Driver Input. With DE high, a low on DI forces the noninverting output low and the inverting output high.
Similarly, a high on DI forces the noninverting output high and the inverting output low.
DI
4
Driver Output Enable. Drive DE high to enable the driver outputs. These outputs are high impedance when
DE is low.
DE
3
PIN
Receiver Output Enable. Drive
RE
low to enable RO; RO is high impedance when
RE
is high.
RE
2
Receiver Output. When
RE
is low, if A - B
≥
-50mV, RO will be high; if A - B
≤
-450mV, RO will be low.
RO
1
FUNCTION
NAME
Typic al Operating Charac teristic s (c ontinued)
(V
CC
= +3.6V, T
A
= +25°C, unless otherwise noted.)
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| MAX3471EUA+ | 功能描述:RS-422/RS-485 接口 IC 1.6uA Half Duplex Differential Tcvr RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3471EUA+T | 功能描述:RS-422/RS-485 接口 IC 1.6uA Half Duplex Differential Tcvr RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3471EUA-T | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3480ACPI | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3480ACPI+ | 功能描述:RS-422/RS-485 接口 IC 3.3V Data Interface RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
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