LTC1921IMS8 Linear Technology, LTC1921IMS8 Datasheet - Page 9

• Manufacturer Part Number: LTC1921IMS8
• Description: IC DUAL PWR SUPPLY MONITOR 8MSOP
• Manufacturer: Linear Technology

Specifications of LTC1921IMS8

• Applications: Dual Power Supply Monitor
• Voltage - Supply: 10 V ~ 80 V
• Current - Supply: 160µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Input: -

APPLICATIO S I FOR ATIO
SUPPLY A
SUPPLY B
–48V
–48V
SUPPLY A
SUPPLY B
RETURN
–48V
–48V
–48V
U
F1
F2
U
RETURN
R1
100k
–48V
R2
100k
1
8
2
7
W
V
V
FUSE A
FUSE B
A
B
R1
100k
LTC1921
RTN
R2
100k
3
1
8
2
7
OUT A
OUT B
OUT F
Figure 3a. Combined Supply Status
Figure 3b. All Outputs Combined
V
V
FUSE A
FUSE B
A
B
U
1921 F03a
LTC1921
4
5
6
RTN
3
OUT A
OUT B
OUT F
MOCD207
R3
47k
1/4W
= LOGIC COMMON
1921 F03b
4
5
6
47k
47k
MOC207
R3
47k
1/4W
–48V OUT
COMMON
5V
FUSE STATUS
5V
SUPPLY
STATUS
LOGIC
47k
–48V OUT
OK: WITHIN SPECIFICATION
0: LED/PHOTODIODE ON
1: LED/PHOTODIODE OFF
5V
STATUS
V
FUSE A
= V
ALL OTHER CONDITIONS
A
OK: WITHIN SPECIFICATION
OV: OVERVOLTAGE
UV: UNDERVOLTAGE
0: LED/PHOTODIODE ON
1: LED/PHOTODIODE OFF
*IF BOTH FUSES (F1 AND F2) ARE OPEN,
UV OR OV
UV OR OV
ALL STATUS OUTPUTS WILL BE HIGH
SINCE R3 WILL NOT BE POWERED
V
V
FUSE A
= V
= V
FUSE B
= V
OK
OK
V
V
V
A
A
A
A
A
B
V
OK
UV OR OV
UV OR OV
A
V
FUSE B
= V
= V
V
OK
OK
OK
V
V
V
B
B
B
B
B
B
STATUS
FUSE STATUS
0
1
SUPPLY STATUS
LTC1921
0
1
1
1*
0
1
1
1
9
1921f