ICL3237IA-T Intersil, ICL3237IA-T Datasheet - Page 8

• Manufacturer Part Number: ICL3237IA-T
• Description: IC 5DRVR/3RCVR RS232 3V 28-TSSOP
• Manufacturer: Intersil
• Type: Transceiverr

Specifications of ICL3237IA-T

• Number Of Drivers/receivers: 5/3
• Protocol: RS232
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

details a transmitter loopback test circuit, and Figure 6
illustrates the standard speed loopback test result for a
single transmitter driving 1000pF and an RS-232 load at
250kbps. Figure 7 shows the megabaud loopback results for
a single transmitter driving 250pF and an RS-232 load at
1Mbps. The static transmitters were also loaded with an
RS-232 receiver.
5V/DIV.
2V/DIV.
FIGURE 4. TRANSMITTER OUTPUTS WHEN EXITING
FIGURE 5. TRANSMITTER LOOPBACK TEST CIRCUIT
V
V
C
C
CC
CC
1
2
V
C1 - C4 = 0.1µF
+
+
CC
= +3.3V
POWERDOWN
0.1µF
SHDN
C1+
C1-
C2+
C2-
T
R
EN
SHDN
IN
OUT
+
TIME (20µs/DIV.)
ICL3237
V
CC
8
T
MBAUD
OUT
R
V+
5K
V-
IN
GND or V
T1
T2
+
+
C
C
C
3
4
L
CC
ICL3237
Interconnection with 3V and 5V Logic
The ICL3237 directly interfaces with most 5V logic families,
including ACT and HCT CMOS. See Table 4 for more
information on possible combinations of interconnections.
POWER-SUPPLY
5V/DIV.
5V/DIV.
R1
R1
T1
T1
TABLE 4. LOGIC FAMILY COMPATIBILITY WITH VARIOUS
FIGURE 6. LOOPBACK TEST AT 250kbps (C
T1
T1
OUT
OUT
OUT
OUT
VOLTAGE
FIGURE 7. LOOPBACK TEST AT 1Mbps (C
SYSTEM
IN
IN
(V)
3.3
5
5
MBAUD = GND
MBAUD = V
V
C1 - C4 = 0.1µF
V
C1 - C4 = 0.1µF
CC
CC
SUPPLY VOLTAGES
= +3.3V
= +3.3V
CC
VOLTAGE
SUPPLY
V
(V)
3.3
3.3
CC
5
0.5µs/DIV.
2µs/DIV.
Compatible with all CMOS
families.
Compatible with all TTL and
CMOS logic families.
Compatible with ACT and HCT
CMOS, and with TTL.
Incompatible with AC, HC, or
CD4000 CMOS.
COMPATIBILITY
L
L
= 250pF)
= 1000pF)