SP3243ECA-L Exar Corporation, SP3243ECA-L Datasheet - Page 9

• Manufacturer Part Number: SP3243ECA-L
• Description: IC TXRX RS232 INTELLIGENT 28SSOP
• Manufacturer: Exar Corporation
• Type: Transceiverr

Specifications of SP3243ECA-L

• Package / Case: 28-SSOP (0.200", 5.30mm Width)
• Number Of Drivers/receivers: 3/5
• Protocol: RS232
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Operating Supply Voltage: 3 V to 5.5 V
• Supply Current: 0.3 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 1016-1120-5

Date: 2/05/06
shows the test results of the loopback circuit with
all drivers active at 250kbps with typical
RS-232 loads in parallel with 1000pF capacitors. A
superior RS-232 data transmission rate of 1Mbps
makes the SP3243EU an ideal match for high
speed LAN and personal computer peripheral
applications.
Receivers
Figure 18. Loopback Test results at 1Mbps
Table 2. SHUTDOWN Truth Tables
Note: In AUTO ON-LINE
GND and SHUTDOWN = V
if there is no activity present at the Receiver inputs.
D
S
H
E
V
U
C I
T
D
0
1
: E
O
W
S
N
P
3
2
4
3
T
H
A
E
X
g i
c
O
U
v i t
h
U
e
Z
T
CC
®
, the device will shut down
Mode where ONLINE =
R
H
A
X
g i
c
O
v i t
h
U
e
Z
T
SP3243 +3.0V to +5.5V RS-232 Transceivers
R
A
A
2
c
c
O
v i t
v i t
U
e
e
T
9
Figure 17. Loopback Test Circuit for RS-232 Driver
Data Transmission Rates
Figure 19. Loopback Test results at 250Kbps
The receivers convert +5.0V EIA/TIA-232
levels to TTL or CMOS logic output levels.
Receivers are active when the AUTO ON-LINE
circuitry is enabled or when in shutdown.
During the shutdown, the receivers will continue
to be active. If there is no activity present at the
receivers for a period longer than 100μs or when
SHUTDOWN is enabled, the device goes into a
standby mode where the circuit draws 1μA. The
To μP Supervisor
Circuit
TTL/CMOS
TTL/CMOS
OUTPUTS
INPUTS
C2
C1
C5
V
CC
+
+
+
0.1μF
0.1μF
0.1μF
C1+
C1-
C2+
C2-
T
T
R
R
SHUTDOWN
ONLINE
STATUS
1
X
1
X
IN
OUT
IN
OUT
SP3243
+3V to +5V
V
GND
CC
© Copyright 2006 Sipex Corporation
5kΩ
5kΩ
T
T
1
X
R
R
OUT
OUT
1
X
V+
IN
IN
V-
1000pF
C3
C4
+
+
0.1μF
0.1μF
1000pF
®