XC6121 TOREX [Torex Semiconductor], XC6121 Datasheet - Page 13

• Manufacturer Part Number: XC6121
• Description: Voltage Detector with Watchdog Function and ON/OFF Control (VDF=1.6V~5.0V)
• Manufacturer: TOREX [Torex Semiconductor]

■PIN LOGIC CONDITIONS
■FUNCTION CHART
PIN NAME
NOTE:
*1: Including all logics of the WD (WD=H, L, OPEN, H→L, L→H).
*2: When the RESETB is High, the circuit is in the release state.
*3: V
*4: The RESETB pin becomes indefinite operation while 0.35V<EN/ENB<1.3V.
*5:
EN/ENB
NOTE:
V
When the RESETB is Low, the circuit is in the detection state.
The EN pin of the XC6121 series is not internally pulled up. When using the watchdog function, please drive the
EN pin in high level. The EN pin of the XC6122 series is internally pulled up. The watchdog function can be
used even the EN pin left open. The ENB pin of the XC6123 series is not internally pulled down. When using
the watchdog function, please drive the ENB pin in low level. The ENB pin of the XC6124 series is internally
pulled up. The watchdog function can be used even the ENB pin left open.
V
For the details of each parameter, please see the electrical characteristics.
H
H
L
IN
IN
IN
V
V
V
V
T
T
=L and EN/ENB=H can not be combined because the rated input voltage of the EN/ENB pin is Vss-0.3V to V
WDIN
WD
DFL
HYS
WDH
WDL
: WD Timeout Period
: Detect Voltage
: Hysteresis Range
: WD Low Level Voltage
: WD High Level Voltage
: WD Pulse Width
XC6121/XC6122
LOGIC
H
H
L
L
EN
H
L
V
EN/ENB>1.30V
EN/ENB<0.35V
XC6123/XC6124
CONDITIONS
IN
>V
V
IN
DFL
<V
ENB
H
L
L
DFL
+V
HYS
OPEN
L⇔H
WD
*1
H
L
PIN NAME
WD
Repeating detect and release (H→L→H)
LOGIC
L→H
H→L
XC6121/XC6122/XC6123/XC6124
H
L
V
V
The state maintaining WD>V
The state maintaining WD<V
WDL
WDH
RESETB (*2)
→V
→V
H
H
L
for more than T
for more than T
WDH
WDL
CONDITIONS
, 300ns≦T
, 300ns≦T
IN
+0.3V.
WD
WDIN
WDIN
WD
Series
≦T
≦T
WDH
WDL
13/23
WD
WD