MAX3212EAI-T Maxim Integrated, MAX3212EAI-T Datasheet - Page 10

• Manufacturer Part Number: MAX3212EAI-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3212r

Specifications of MAX3212EAI-T

• Data Rate: 235 Kbps
• Operating Supply Voltage: 2.7 V to 3.6 V
• Supply Current: 3 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Function: Transceiver
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 3
• Number Of I/os: 17
• Number Of Receivers: 5
• Propagation Delay Time Ns: 2 us
• Shutdown: Yes

+2.7V to +3.6V-Powered, 1µA Supply Current,
3-Driver/5-Receiver, True RS-232 Transceiver
_____+3V-Powered EIA/TIA-232 and EIA/TIA-562 Transceivers from Maxim
Figure 6. Mouse Emulation Circuit Current
10
MAX3222
MAX3223
MAX3232
MAX3241
MAX3243
MAX3212
MAX212
MAX218
MAX562
MAX563
PART
______________________________________________________________________________________
-1
-3
-5
-7
7
5
3
1
0
vs. LOAD CURRENT PER TRANSMITTER
T1IN AND T2IN = GND
T3IN = V
T3OUT, T2OUT, T1OUT
ALL LOADED
SIMULTANEOUSLY
LOAD CURRENT PER TRANSMITTER (mA)
VOLTAGE
1.8 to 4.25
2.7 to 5.25
TRANSMITTER OUTPUT VOLTAGE
POWER-
3.0 to 3.6
3.0 to 3.6
2.7 to 3.6
3.0 to 5.5
3.0 to 5.5
3.0 to 5.5
3.0 to 5.5
3.0 to 5.5
SUPPLY
1
(V)
2
CC
3
4
T1OUT AND T2OUT
V
CC
TRANSMITTERS/
= 2.7V
5
RECEIVERS
T3OUT
6
No. OF
V
3/5
2/2
3/5
2/2
3/5
2/2
2/2
2/2
3/5
3/5
CC
7
= 3.3V
8
9
SHUTDOWN
RECEIVERS
ACTIVE IN
No. OF
N/A
5
2
5
2
5
2
2
5
1
The MAX3212 can directly interface with various 5V
logic families, including ACT and HCT CMOS.
The MAX3212 has been specifically designed to power
serial mice while operating from low-voltage power sup-
plies. It has been tested with samples of ten major
mouse models from six manufacturers, including the
leading three, Logitech (5 models), Mouse Systems,
and Microsoft. The MAX3212 successfully drove all ser-
ial mice and met their respective current and voltage
requirements.
Figure 6 shows the transmitter output voltages under
increasing load current. The MAX3212’s switching reg-
ulator ensures the transmitters will supply at least ±5V
during worst-case load conditions.
ANTEED
GUAR-
(kbps)
DATA
RATE
120
120
230
230
235
120
120
120
120
120
Driving the MAX3212 from 5V Logic
EIA/TIA-
OR 562
232
232
232
562
562
232
232
232
232
232
232
Drives mice
Operates directly from batteries
without a voltage regulator
Wide supply range
0.1µF capacitors
AutoShutdown, complementary
receiver, drives mice, transient
detection
0.1µF capacitors
0.1µF capacitors, AutoShutdown
0.1µF capacitors
0.1µF capacitors, 2 complemen-
tary receivers, drives mice
0.1µF capacitors, AutoShutdown,
complementary receiver,
drives mice
Mouse Driveability
FEATURES