4 Pin Configuration and Functions

Figure 4-1 DB (SSOP) Package (Top View)

Table 4-1 Pin Functions

PIN		TYPE⁽¹⁾	DESCRIPTION
NAME⁽²⁾	NO.	TYPE⁽¹⁾	DESCRIPTION
DOUT3	1	O	RS-232 driver outputs
DOUT1	2
DOUT2	3
RIN2	4	I	RS-232 receiver input
ROUT2	5	O	Receiver output
DIN2	6	I	Driver inputs
DIN1	7	I	Driver inputs
ROUT1	8	O	Receiver output
RIN1	9	I	RS-232 receiver input
GND	10	-	Ground
V_CC	11	-	Supply voltage
C1+	12	-	Positive terminal of the voltage-doubler charge-pump capacitor
V+	13	-	Positive charge pump output voltage
C1−	14	-	Negative terminal of the voltage-doubler charge-pump capacitor
C2+	15	-	Positive terminal of the voltage-doubler charge-pump capacitor
C2−	16	-	Negative terminal of the voltage-doubler charge-pump capacitor
V−	17	-	Negative charge pump output voltage
RIN5	18	I	RS-232 receiver input
ROUT5	19	O	Receiver output
DIN3	20	I	Driver inputs
DIN4	21	I	Driver inputs
ROUT4	22	O	Receiver output
RIN4	23	I	RS-232 receiver input
EN	24	I	Active high enable
SHDN	25	I	Active low shutdown
ROUT3	26	O	Reciver output
RIN3	27	I	RS-232 receiver input
DOUT4	28	O	RS-232 driver output

(1) Signal Types: I = Input, O = Output, I/O = Input or Output.

(2) DIN pins have 400KΩ internal pull up to V_{CC .}