ad51-069-0reel Analog Devices, Inc., ad51-069-0reel Datasheet - Page 8

• Manufacturer Part Number: ad51-069-0reel
• Description: Half-duplex Icoupler-r Isolated Rs-485 Transceiver
• Manufacturer: Analog Devices, Inc.

ADM2483
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 8. Pin Function Descriptions
Pin No.
1
2, 8
3
4
5
6
7
9, 15
10, 11, 14
12
13
16
Mnemonic
V
GND
RxD
RE
DE
TxD
PV
GND
NC
A
B
V
DD1
DD2
1
2
Description
Power Supply (Logic Side).
Ground (Logic Side).
Receiver Output Data. When enabled, if (A − B) ≥ −30 mV, then RxD = high. If (A − B) ≤ −200 mV, then
RxD = low. This is a tristate output when the receiver is disabled, that is, when RE is driven high.
Receiver Enable Input. This is an active-low input. Driving this input low enables the receiver, and
driving it high disables the receiver.
Driver Enable Input. Driving the input high enables the driver, and driving it low disables the driver.
Transmit Data Input. Data to be transmitted by the driver is applied to this input.
Power_Valid. Used during power-up and power-down. See the Applications Information section.
Ground (Bus Side).
No Connect.
Noninverting Driver Output/Receiver Input. When the driver is disabled, or when V
powered down, Pin A is put into a high impedance state to avoid overloading the bus.
Inverting Driver Output/Receiver Input. When the driver is disabled, or when V
down, Pin B is put into a high impedance state to avoid overloading the bus.
Power Supply (Bus Side).
1
PIN 2 AND PIN 8 ARE INTERNALLY CONNECTED.
EITHER OR BOTH MAY BE USED FOR GND
PIN 9 AND PIN 15 ARE INTERNALLY CONNECTED.
EITHER OR BOTH MAY BE USED FOR GND
GND
GND
V
RxD
TxD
DD1
RE
DE
PV
1
1
1
1
Figure 2. Pin Configuration
NC = NO CONNECT
1
2
3
4
5
6
7
8
Rev. B | Page 8 of 20
(Not to Scale)
ADM2483
TOP VIEW
16
15
14
13
12
11
10
9
V
GND
NC
B
A
NC
NC
GND
DD2
2
2
1
1
1
2
.
.
DD1
or V
DD1
DD2
or V
is powered
DD2
is