upd4724 Renesas Electronics Corporation., upd4724 Datasheet - Page 3

• Manufacturer Part Number: upd4724
• Description: Rs-232 Line Driver/receiver At 3.3 V/5 V
• Manufacturer: Renesas Electronics Corporation.

TRUTH TABLE
Driver
Receiver
3 V and 5 V Switching
H: High level, L: Low level, Z: High-impedance, : Don’t care
Note Be sure to switch the V
STBY EN
STBY
H
H
V
L
L
L
H
H
CHA
H
L
L
H
H
L
5 V mode (Double boost)
3 V mode (Triple boost)
R
D
H
L
4
IN
to R
H
L
Operation mode
5
R
H
L
IN
D
R
Note
OUT
Z
H
L
1
to R
3
CHA
Standby mode (D/D converter OFF)
Space level output
Mark level output
R
pin in standby mode (STBY = L).
4
to R
H
H
L
R
5
OUT
H
L
R
1
to R
H
H
H
Remark
3
Standby mode1 (D/D converter OFF)
Standby mode2 (D/D converter OFF, R
Standby mode2 (D/D converter OFF, R
Mark level input
Space level input
Remark
4
4
and R
and R
PD4724
5
5
operate)
operate)
3