LTC2906/LTC2907
3
29067f
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= V1 = 2.5V, V
ADJ
= 0.55V, S1 = TOL = 0V, unless otherwise noted.
(Notes 2, 3, 4)
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The greater of V1, V
CC
is the internal supply voltage (V
MAX
).
Note 3: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 4: For reset thresholds test conditions refer to the voltage threshold
programming table in the Applications Information section.
Note 5: The output pins RST and RST have an internal pull-up to V
MAX
of
typically –6µA. However, an external pull-up resistor may be used when
faster rise time is required or for V
OH
voltages greater than V
MAX
.
Note 6: The input current to the three-state input pins are the pull-up and
the pull-down current when the pins are either set to V1 or GND
respectively. In the open state, the maximum leakage current to V1 or GND
permissible is 10µA.
5V Threshold Voltage vs
Temperature
3.3V Threshold Voltage vs
Temperature
2.5V Threshold Voltage vs
Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
TMR(UP)
TMR Pull-Up Current (LTC2907) V
TMR
= 0V ● –1.5 –2.1 –2.7 µA
I
TMR(DOWN)
TMR Pull-Down Current (LTC2907) V
TMR
= 1.4V ● 1.5 2.1 2.7 µA
t
RST
Reset Time-Out Period (LTC2906) ● 140 200 260 ms
t
RST
Reset Time-Out Period (LTC2907) C
TMR
= 22nF ● 140 200 260 ms
t
UV
V
X
Undervoltage Detect to V
X
Less Than Reset Threshold V
RTX
150 µs
RST or RST by More than 1%
V
OL
Output Voltage Low RST, RST I = 2.5mA ● 0.15 0.4 V
I = 100µA; V1 and/or V
CC
= 1V (RST Only) ● 0.05 0.3 V
V
OH
Output Voltage High RST, RST I = –1µA ● V
MAX
– 1 V
(Notes 2, 5)
Three-State Inputs S1, TOL
V
IL
Low Level Input Voltage ● 0.4 V
V
IH
High Level Input Voltage ● 1.4 V
V
Z
Pin Voltage when Left in Hi-Z State I = –10µA ● 0.7 V
I = 0µA 0.9 V
I = 10µA
● 1.1 V
I
VPG
Programming Input Current (Note 6) ● ±25 µA
Specifications are at T
A
= 25°C unless otherwise noted.
TEMPERATURE (°C)
THRESHOLD VOLTAGE, V
RT50
(V)
29067 G01
TEMPERATURE (°C) TEMPERATURE (°C)
THRESHOLD VOLTAGE, V
RT33
(V)
3.12
3.07
3.02
2.97
2.92
2.87
29067 G02
THRESHOLD VOLTAGE, V
RT25
(V)
29067 G03
2.375
2.325
2.275
2.225
2.175
4.75
4.70
4.65
4.60
4.55
4.50
4.45
4.40
4.35
–50 100
25
75
–25
0
50
–50 100
25
75
–25
0
50
–50 100
25
75
–25
0
50
5%
7.5%
10%
5%
7.5%
10%
5%
7.5%
10%
