YB1921
3-Pin Microprocessor Reset Monitor
Electrical Characteristics
Vcc=5V for L/M/J; 3.3V for T/S; 3.0V for R, TA = 25°C, unless otherwise specified.
Parameter
Input Voltage
Symbol
VCC
Condition
—
Min
2.0
Typ
Max
5.5
Unit
V
—
Supply Current
Reset Threshold
ICC
—
—
18
25
μA
4.54
4.29
3.92
3.02
2.87
2.58
4.63
4.38
4.00
3.08
2.93
2.63
4.72
4.47
4.08
3.14
2.99
2.68
YB1921L-4.63V
YB1921M-4.38V
YB1921J-4.00V
YB1921T-3.08V
YB1921S-2.93V
YB1921R-2.63V
VTH
V
Reset Threshold Temperature
Coefficient (4)
—
—
—
—
—
—
30
20
—
—
ppm/°C
VCC to Reset Delay VCC = VTH to
(VTH – 100mV)
μsec
Reset Active Timeout Period
RESET Output Voltage Low
RESET Output Voltage High
—
—
—
—
240
—
—
0.4
—
msec
VOL
VOH
ISINK = 3mA
ISOURCE = 800μA
V
V
0.8VCC
—
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The device is not guaranteed to function outside its operating rating.
Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD (MAX)
=
(TJ (MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the
regulator will go into thermal shutdown. See “Thermal Consideration” section for details
Note 4: RESET threshold temperature coefficient is the worst case voltage change divided by the total temperature
range.
YB1921
www.yobon.com.tw
3
YOBON [ YOBON TECHNOLOGIES,INC. ]
