XR32220_17 Datasheet, PDF (6/15 Pages) Exar Corporation – 2-Driver/2-Receiver Intelligent RS-232 Transceiver with 1.65V to 5.5V Interface

Pin Configuration
XR32220
24
23
22
21
20
19
NC 1
18 VL
NC 2
17 GND
R1IN 3
16 C1-
R2IN 4
15 Online
T1OUT 5
14 Shutdown
T2OUT 6
13 Status
7
8
9
10
11
12
Pin Functions
Pin Number Pin Name
Type
Description
1, 2, 7, 8
3, 4
5, 6
9, 10
11, 12
13
14
15
16, 21
17
18
19
20
22, 23
24
-
NC
R1IN, R2IN
-
No Connect (not connect to the die). Can be left floating or tied to GND or V_CC.
Inputs
(5KΩ pull-down)
±15KV ESD Protected, RS-232 Receiver Inputs.
T1OUT, T2OUT
Output
±15KV ESD Protected, RS-232 Driver Output.
T2IN, T1IN
Input
TTL/CMOS Driver Input.
R2OUT, R1OUT
Status
Shutdown
Online
C1-, C1+
Output
Output
Input
Input
Analog
TTL/CMOS Receiver Output.
TTL/CMOS level output indicating if no valid RS-232 levels are present at the R1IN or R2IN
input pins.
TTL/CMOS level input, when driven low puts the XR32220 into shutdown mode (tri-stating
driver outputs and disabling the charge-pump); normal operation when driven high.
TTL/CMOS level input. A low input enables Auto On-Line mode, a high input disables Auto
On-Line Mode.
Negative and positive terminals of voltage doubler charge pump capacitor.
GND
Supply
Ground.
VL
Supply
I/O Power Supply.
VCC
Supply
Power Supply.
V+
Analog
Regulated positive (+5.5V) charge pump rail.
C2+, C2-
Analog
Positive and negative terminals of the inverting charge pump capacitor.
V-
Paddle
Analog
Supply
Regulated positive (-5.5V) charge pump rail.
Ground. The exposed paddle on the bottom of package is connected to device ground.
The paddle should be connected to ground on pcb.
REV1B
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