LTC2915 Datasheet, PDF (4/12 Pages) Linear Technology – Voltage Supervisor with 27 Selectable Thresholds

LTC2915/LTC2916
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 2.5V, unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Reset Timer Control (RT)
I_RT(UP)
RT Pull-Up Current
I_RT(DOWN)
RT Pull-Down Current
I_RT(INT)
Internal RT V_CC Detect Current
V_RT(INT,LH)
RT Internal Timer Threshold
Reset Output (RST)
V_RT = 0.25V
V_RT = 1.1V
V_RT = V_CC
V_RT Rising, Referenced to V_CC
l –2
–3
–4
μA
l
2
3
4
μA
l
1
8
μA
l –100 –160 –300
mV
t_RST(INT)
t_RST(EXT)
t_UV
V_OL
Internal Reset Timeout Period
Adjustable Reset Timeout Period
VM Undervoltage Detect to RST
Asserted
Output Voltage Low RST
I_OH(RST)
RST Output Voltage High Leakage
Manual Reset Input (LTC2916)
V_RT = V_CC
C_RT = 2.2nF
VM Less Than Reset Threshold
V_MTX by More Than 5%
V_CC = 3.3V, I_RST = 2.5mA
V_CC = 1V, I_RST = 100μA
V_CC = 0.8V, I_RST = 15μA
RST = V_CC
l 150
200
260
ms
l 16
20
25
ms
l 10
80
150
μs
l
0.15
0.4
V
l
0.15
0.3
V
l
0.05
0.2
V
l
±1
μA
V_IL
Input Low Voltage
V_IH
Input High Voltage
R_PU
Pull Up Resistance
t_PW
Pulsewidth
l
0.2 • V_CC
V
l 0.8 • V_CC
V
l 50
100
150
kΩ
l 250
ns
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 3: V_CC maximum pin voltage is limited by input current. Since the
V_CC pin has an internal 6.2V shunt regulator, a low impedance supply
which exceeds 5.7V may exceed the rated terminal current. Operation
from higher voltage supplies requires a series dropping resistor. See
Applications Information.
Note 4: Input impedance is dependent on the configuration of the SEL
pins.
TIMING DIAGRAM
Monitor Input Timing
VM V_MTx
t_UV
RST
1V
t_RST
29156 TD01
29156fa
4