MAX845 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX845 Datasheet PDF : 16 Pages
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Isolated Transformer Driver
for PCMCIA Applications
VIN
5V
C1
6
0.1µF 5 N.C. VCC D1 1
ON / OFF
4
MAX845
SD
D2 8
FS 3 N.C.
GND1 GND2
2
7
ISOLATION
BARRIER
1CT:1.3CT
MBR0520
C3
0.1µF
MBR0520
8 IN
OUT 2
C2
2.2µF MAX883
ISO 5V
C4
2.2µF
5 x 3.3k
SET GND SHDN
6 45
*74HC04
T1IN
74HC04
T2IN
74HC04
T3IN
74HC04
T4IN
74HC04
T5IN
390Ω
390Ω
390Ω
390Ω
390Ω
10 x PC417
1
6
5
2
4
27, 28 13, 14
3
VCC
T1IN
GND
T1OUT
11
4 T2IN
T2OUT 12
25 T3IN
T3OUT 18
24 T4IN
T4OUT 17
23 T5IN
T5OUT 16
5 x 3.3k
MAX225
74HC04
R1OUT
74HC04
R2OUT
6
1
5
4
2
390Ω
390Ω
5 R1OUT
6 R2OUT
R1IN 10
R2IN 9
74HC04
R3OUT
74HC04
R4OUT
390Ω
390Ω
7 R3OUT
22
R4OUT
R3IN 8
R4IN 19
74HC04
R5OUT
390Ω
21
R5OUT
SD
1
R5IN 20
EN
2
*74HC04 OR EQUIVALENT
4N25 LOWER SPEED, LOWER COST ALTERNATE OPTOCOUPLER CONFIGURATIONS (FOR DATA RATES BELOW 9.6kbps)
TIN
4N25 6 1N5711
390Ω 1
3.3k
5
*74HC04
VCC
1N5711
3.3k
ISO ROUT
TIN
74HCO4
5
6 4N25
1
390Ω
VCC
ISO
ROUT
2
ISO
2 ISO
4 GND
4
GND
Figure 10. Typical RS-232 Application Circuit
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