Data Sheet ADM2486
Rev. E | Page 9 of 20
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
04604-003
1
PIN 2 AND PIN 8 ARE INTERNALLY CONNECTED.
EITHER OR BOTH MAY BE USED FOR GND
1
.
PIN 9 AND PIN 15 ARE INTERNALLY CONNECTED.
EITHER OR BOTH MAY BE USED FOR GND
2
.
V
DD1
1
GND
1
1
2
RxD
3
RE
4
V
DD2
16
GND
2
1
15
NC
14
B
13
RTS
5
A
12
TxD
6
NC
11
PV
7
DE
10
GND
1
1
8
GND
2
1
9
NC = NO CONNECT
ADM2486
TOP VIEW
(Not to Scale)
Figure 2. Pin Configuration
Table 8. Pin Function Descriptions
No.
Mnemonic Description
DD1
Power Supply (Logic Side), 3 V or 5 V Supply. Decoupling capacitor to GND
1
required, capacitor value should be
between 0.01 µF and 0.1 µF.
2, 8 GND
1
Ground (Logic Side).
3 RxD
Receiver Output Data. This output is high when (A – B) > 200 mV and low when (A – B) < –200 mV. The output
is three-stated 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.
5 RTS Request to Send Input. Driving this input high enables the driver, and driving it low disables the driver.
6 TxD Transmit Data Input. Data to be transmitted by the driver is applied to this input.
7 PV
Power_Valid. Used during power-up and power-down, needs to be tied high when the ADM2486 is operational,
see the Applications Information section.
9, 15 GND
2
Ground (Bus Side).
10 DE
Driver Enable Status Output. This output signals the driver enable or disable status to other devices on the bus.
DE is high when the driver is enabled and low when the driver is disabled.
11, 14 NC No Connect.
12 A
Noninverting Driver Output/Receiver Input. When the driver is disabled, or when V
DD1
or V
DD2
is powered down,
Pin A is put into a high impedance state to avoid overloading the bus.
13 B
Inverting Driver Output/Receiver Input. When the driver is disabled, or when V
DD1
or V
DD2
is powered down,
Pin B is put into a high impedance state to avoid overloading the bus.
16 V
DD2
Power Supply (Bus Side), 5 V Isolated Supply. Decoupling capacitor to GND
2
required, capacitor value should be
between 0.01 µF and 0.1 µF.
