SP3222EB/SP3232EB
Data Sheet True +3. 0V to +5. 5V RS-232 Transceivers
General Description
The SP3222EB and SP3232EB series are RS-232 transceiver solutions intended for portable or hand-held applications such as notebook or laptop computers. The SP3222EB / SP3232EB series has a high-efficiency, charge-pump power supply that requires only 0. 1µF capacitors in 3. 3V operation. This charge pump allows the SP3222EB / SP3232EB series to deliver true RS-232 performance from a single power supply ranging from 3. 0V to 5. 5V. The SP3222EB / SP3232EB are 2-driver / 2-receiver devices. The ESD tolerance of the SP3222EB / SP3232E devices is over ±15kV for both Human Body Model and IEC61000-4-2 Air discharge test methods. The SP3222EB device has a low-power shutdown mode where the devices’ driver outputs and charge pumps are disabled. During shutdown, the supply current falls to less than 1µA.
Features
■ Meets true EIA / TIA-232-F standards from a 3. 0V to
5. 5V power supply
■ 250kbps transmission rate under load ■ 1μA low power shutdown with receivers active
(SP3222EB)
■ Interoperable with RS-232 down to a 2. 7V power source ■ Enhanced ESD specifications:
±15kV Human Body Model ±15kV IEC61000-4-2 Air Discharge ±8kV IEC61000-4-2 Contact Discharge
Ordering Information - page 18
Selection Table
Table 1: Selection Table
Device SP3222EB SP3232EB
Power Supplies 3. 0V to 5. 5V 3. 0V to 5. 5V
RS-232 Drivers
2 2
RS-232 Receivers
2 2
External Components 4 Capacitors 4 Capacitors
Shutdown Yes No
TTL 3-State
Yes No
# of Pins 20 16
Pinouts
EN 1 C1+ 2
20 SHDN 19 VCC
V+ 3
18 GND
C1- 4
17 T1OUT
C2+ 5 SP3222EB 16 R1IN
C2- 6
15 R1OUT
V- 7
14 N. C.
T2OUT 8 R2IN 9
13 T1IN 12 T2IN
R2OUT 10
11 N. C.
C1+ 1
16 VCC
V+ 2
15 GND
C1- 3 C2+ 4 C2- 5
14 T1OUT SP3232EB 13 R1IN
12 R1OUT
V- 6
11 T1IN
T2OUT 7
10 T2IN
R2IN 8
9 R2OUT
T2OUT R2IN
R2OUT T2IN
V+ C1+ V CC GND
16 15 14 13
C1- 1
12 T1OUT
C2+ 2
11 R1IN
SP3232EB
C2- 3
10 R1OUT
V- 4
9 T1IN
5678
SSOP / TSSOP
...