CS8140YDW24 CHERRY [Cherry Semiconductor Corporation], CS8140YDW24 Datasheet - Page 7

• Manufacturer Part Number: CS8140YDW24
• Description: 5V, 500mA Linear Regulator with ENABLE, , and Watchdog RESET
• Manufacturer: CHERRY [Cherry Semiconductor Corporation]

3a: V
3b: V
3c: V
3d: V
3e: WDI held high after a normal period of operation; ENABLE = LOW.
3f: WDI held low or is too slow after a normal period of operation; ENABLE = LOW.
3g: WDI frequency rises above the upper frequency threshold after a normal period of operation; ENABLE = LOW
(for the CS8140 only).
OUT
OUT
OUT
OUT
when Watchdog is too slow and ENABLE = HIGH.
when Watchdog is held high and ENABLE = HIGH.
when Watchdog is held low and ENABLE = HIGH.
when Watchdog is too fast and ENABLE = HIGH.
ENABLE
ENABLE
RESET
ENABLE
ENABLE
ENABLE
ENABLE
ENABLE
RESET
RESET
RESET
RESET
RESET
RESET
V
V
WDI
OUT 0V
V
WDI
V
V
V
V
V
OUT 0V
WDI
WDI
V
WDI
WDI
WDI
OUT 0V
OUT 0V
OUT 0V
OUT 0V
OUT 0V
IN
V
V
V
V
V
IN
IN
IN
IN
IN
IN
Figure 3: Timing Diagrams for Watchdog and ENABLE Functions
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
Battery
Battery
Battery
Battery
Battery
Battery
Battery
Battery
POR
POR
POR
POR
Battery
Battery
POR
Battery
Battery
POR
Battery
Battery
POR
Normal Operation
Normal Operation
Normal Operation
Normal Operation
Normal Operation
Normal Operation
Normal Operation
WDI
low
WDI
high
Sleep Mode
7
Sleep Mode
Sleep Mode
Fast WDI signal
WDI held High
Slow WDI signal
WDI held Low
POR
POR
POR
Normal Operation
Normal Operation
Normal Operation