MAX240CMH-T Maxim Integrated, MAX240CMH-T Datasheet - Page 33

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MAX240CMH-T

Manufacturer Part Number
MAX240CMH-T
Description
RS-232 Interface IC
Manufacturer
Maxim Integrated
Series
MAX220, MAX222, MAX223, MAX225, MAX230, MAX231, MAX232, MAX232A, MAX233, MAX233A, MAX234, MAX235, MAX236, MAX237, MAX238, MAX239, MAX240, MAX241, MAX242, MAX243, MAX244, MAX245, MAX246, MAX247, MAX248, MAX249r
Datasheet

Specifications of MAX240CMH-T

Data Rate
120 Kbps
Operating Supply Voltage
5 V
Supply Current
15 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Function
Transceiver
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Number Of Drivers
5
Number Of I/os
20
Number Of Receivers
5
Propagation Delay Time Ns
10 us
Shutdown
Yes
Maxim Integrated
Figure 24. MAX248 Pin Configuration and Typical Operating Circuit
RA1OUT
RA2OUT
RA3OUT
RA4OUT
RA2IN
RA1IN
TA1IN
TA2IN
TA3IN
TA4IN
ENRA
TOP VIEW
10
11
12
13
14
15
16
17
MAX248 FUNCTIONAL DESCRIPTION
8 RECEIVERS
8 TRANSMITTERS
4 CONTROL PINS
8
7
9
4 A-SIDE RECEIVERS
4 B-SIDE RECEIVERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVER B-SIDE (ENTB
18
6
19 20
5
4
21
3
22 23
MAX248
2
PLCC
+
1
+5V-Powered, Multichannel RS-232
44
24
43
25
)
42
26
41
27 28
40
35
34
33
32
31
30
29
39
38
37
36
RB3IN
RB2IN
RB1IN
ENRB
RB1OUT
RB2OUT
RB3OUT
RB4OUT
TB1IN
TB2IN
TB3IN
1μF
1μF
21
23
24
25
18
14
15
16
17
10 RA1OUT
11 RA2OUT
12 RA3OUT
13
1
2
3
4
8 RA1IN
7 RA2IN
6 RA3IN
5 RA4IN
9
C1+
C1-
C2+
C2-
ENTA
TA1OUT
TA1IN
TA2OUT
TA2IN
TA3OUT
TA3IN
TA4OUT
TA4IN
RA4OUT
ENRA
MAX220–MAX249
MAX220–MAX249
5kΩ
5kΩ
5kΩ
5kΩ
Drivers/Receivers
+10V TO -10V VOLTAGE INVERTER
1μF
+5V TO +10V VOLTAGE DOUBLER
+5V
+5V
+5V
+5V
20
400kΩ
400kΩ
400kΩ
400kΩ
GND
+5V
V
CC
19
+5V
+5V
+5V
+5V
5kΩ
5kΩ
5kΩ
5kΩ
1μF
TB1OUT
TB2OUT
TB3OUT
TB4OUT
RB1OUT
RB2OUT
RB3OUT
RB4OUT
TB1IN
TB2IN
TB3IN
TB4IN
RB1IN
RB2IN
RB3IN
RB4IN
ENTB
ENRB
V+
V-
22
26
27
44
31
43
30
42
29
41
28
37
35
38
34
39
33
40
32
36
1μF
33