UPD4723GS-GJG NEC [NEC], UPD4723GS-GJG Datasheet - Page 3

• Manufacturer Part Number: UPD4723GS-GJG
• Description: RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V
• Manufacturer: NEC [NEC]

Truth Table
Driver
Receiver
3 V
H: high-level, L: low-level, Z: high-impedance, : H or L
Note 5. When switching V
STBY
STBY
V
H
H
H
H
CHA
H
L
L
L
L
L
5 V switching
5 V mode (double step-up)
3 V mode (3 times step-up)
DIN
EN
H
H
H
L
L
Operating mode
Note 5
R
DOUT
2
to R
H
L
H
Z
L
CHA
3
R
H
L
, standby mode must be selected (STBY = L).
IN
Standby mode (DC/DC converter is stopped)
Space level output
Mark level output
R
1
R
2
to R
H
H
L
3
R
H
OUT
L
R
H
H
H
1
Remarks
Standby mode 1 (DC/DC converter is stopped)
Standby mode 2 (DC/DC converter is stopped, R
R
Standby mode 2 (DC/DC converter is stopped, R
R
Mark level input
Space level input
3
3
are operated)
are operated)
Remarks
PD4723
2
2
and
and
3