ICL3221EIVZ-T Intersil, ICL3221EIVZ-T Datasheet - Page 19

• Manufacturer Part Number: ICL3221EIVZ-T
• Description: IC TXRX SGL RS232 3-5.5V 16TSSOP
• Manufacturer: Intersil
• Type: Transceiverr

Specifications of ICL3221EIVZ-T

• Number Of Drivers/receivers: 1/1
• Protocol: RS232
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

output voltages under increasing load current. The
on-chip switching regulator ensures the transmitters will
supply at least
for paralleled V+ transmitters, 7.3mA for single V-
transmitter). The Automatic Power-Down feature does
not work with a mouse, so FORCEOFF and FORCEON
should be connected to V
High Data Rates
The ICL32xxE maintain the RS-232
transmitter output voltages even at high data rates.
Figure 10 details a transmitter loopback test circuit, and
Figure 11 illustrates the loopback test result at 120kbps.
For this test, all transmitters were simultaneously driving
RS-232 loads in parallel with 1000pF, at 120kbps.
Figure 12 shows the loopback results for a single
transmitter driving 1000pF and an RS-232 load at
250kbps. The static transmitters were also loaded with
an RS-232 receiver.
FIGURE 10. TRANSMITTER LOOPBACK TEST CIRCUIT
FIGURE 9. TRANSMITTER OUTPUT VOLTAGE vs LOAD
-1
-2
-3
-4
-5
-6
6
5
4
3
2
1
0
0
V
V
C
C
CC
CC
1
2
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E, ICL3243E
V
+
+
CC
1
CURRENT (PER TRANSMITTER, i.e.,
DOUBLE CURRENT AXIS FOR TOTAL
V
0.1µF
LOAD CURRENT PER TRANSMITTER (mA)
V
OUT+
±
T1
T2
T3
CC
5V during worst case conditions (15mA
2
= 3.0V
C1+
C1-
C2+
C2-
T
R
EN
SHDN OR
FORCEOFF
IN
OUT
CURRENT)
3
ICL3241E, ICL3243E
+
V
V
OUT
OUT
ICL32xxE
4
CC
19
+
V
-
CC
.
5
T
OUT
6
R
5K
V+
±
V-
IN
5V minimum
7
V
V
OUT
OUT
8
+
-
+
+
C
C
1000pF
9
3
4
10
Interconnection with 3V and 5V
Logic
The ICL32XX directly interface with 5V CMOS and TTL
logic families. Nevertheless, with the ICL32XX at 3.3V,
and the logic supply at 5V, AC, HC, and CD4000 outputs
can drive ICL32XX inputs, but ICL32XX outputs do not
reach the minimum V
Table 4 for more information.
POWER-SUPPLY
TABLE 4. LOGIC FAMILY COMPATIBILITY WITH
5V/DIV
R1
5V/DIV
R1
T1
T1
VOLTAGE
T1
T1
OUT
OUT
OUT
OUT
SYSTEM
IN
IN
(V)
3.3
FIGURE 11. LOOPBACK TEST AT 120kbps
FIGURE 12. LOOPBACK TEST AT 250kbps
5
V
C1 - C4 = 0.1µF
V
C1 - C4 = 0.1µF
CC
CC
VARIOUS SUPPLY VOLTAGES
= +3.3V
= +3.3V
VOLTAGE
SUPPLY
IH
V
(V)
3.3
CC
5
for these logic families. See
2µs/DIV
5µs/DIV
Compatible with all CMOS
families.
Compatible with all TTL and
CMOS logic families.
COMPATIBILITY
February 22, 2010
FN4910.21