X40420S14I-B Intersil, X40420S14I-B Datasheet - Page 8

• Manufacturer Part Number: X40420S14I-B
• Description: IC VOLT MON DUAL SUP/SW 14-SOIC
• Manufacturer: Intersil
• Type: Multi-Voltage Supervisorr

Specifications of X40420S14I-B

• Number Of Voltages Monitored: 2
• Output: Open Drain, Open Drain
• Reset: Active High/Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: 2.6V, 4.6V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 6. V
WEL: Write Enable Latch (Volatile)
The WEL bit controls the access to the memory and to
the Register during a write operation. This bit is a vola-
tile latch that powers up in the LOW (disabled) state.
While the WEL bit is LOW, writes to any address,
including any control registers will be ignored (no
acknowledge will be issued after the Data Byte). The
WEL bit is set by writing a “1” to the WEL bit and
zeroes to the other bits of the control register.
Old V
TRIPX
New V
X
applied + | Error |
Set/Reset Sequence (X = 1, 2)
X
applied =
Error < MDE
8
NO
–
No
V
Set Higher V
Set V
Apply V
> Desired V
TRIPX
V
TRIPX
Output Switches?
Desired V
Actual V
Present Value
X40420, X40421
X
Decrease V
Reset Sequence
= desired V
V
Desired
Execute
Execute
CC
DONE
Programming
TRIPX
and Voltage
TRIPX
X
TRIPX -
| Error | < | MDE |
TRIPX
<
Sequence
YES
YES
to V
X
TRIPX
X
Once set, WEL remains set until either it is reset to 0
(by writing a “0” to the WEL bit and zeroes to the other
bits of the control register) or until the part powers up
again. Writes to the WEL bit do not cause a high volt-
age write cycle, so the device is ready for the next
operation immediately after the stop condition.
Error > MDE
Old V
Execute Reset V
New V
X
Sequence
applied - | Error |
+
Let: MDE = Maximum Desired Error
Vx = V
Note: X = 1, 2
X
applied =
Desired Value
CC
TRIPX
, VxMON
MDE
MDE
Error = Actual - Desired
+
–
Error Range
Acceptable
May 25, 2006