LTC2904 Linear Technology, LTC2904 Datasheet - Page 3

• Manufacturer Part Number: LTC2904
• Description: (LTC2904 / LTC2905) Precision Dual Supply Monitors
• Manufacturer: Linear Technology

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temperature range, otherwise specifications are at T
(Notes 2, 3)
SYMBOL
V
I
I
I
I
t
t
t
V
V
Three-State Inputs S1, S2, TOL
V
V
V
I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The greater of V1, V2 is the internal supply voltage (V
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.
ELECTRICAL CHARACTERISTICS
V1
V2
TMR(UP)
TMR(DOWN)
RST
RST
UV
VPG
CCMIN
OL
OH
IL
IH
Z
PARAMETER
Minimum Internal Operating Voltage (Note 2) RST in Correct Logic State
V1 Input Current
V2 Input Current
TMR Pull-Up Current
TMR Pull-Down Current
Reset Time-Out Period
Reset Time-Out Period
Vx Undervoltage Detect to
RST or RST
Output Voltage Low RST, RST
Output Voltage High RST, RST
(Notes 2, 5)
Low Level Input Voltage
High Level Input Voltage
Pin Voltage when Left in Open State
Programming Input Current (Note 6)
(LTC2905)
(LTC2905)
(LTC2904)
(LTC2905)
A
CC
= 25°C. V1 = 2.5V, V2 = 1V, S1 = TOL = V1, S2 = 0V, unless otherwise noted.
).
CONDITIONS
Includes Input Current to Three-State Pins
V
V
C
Vx Less than Reset Threshold V
by More than 1%
I = 2.5mA
I = 100µA; V1 = 1V (RST Only)
I = –1µA
I = –10µA
I = 0µA
I = 10µA
TMR
TMR
TMR
The
= 1.4V
= 22nF
= 0V
●
denotes the specifications which apply over the full operating
Note 5: The output pins RST and RST have an internal pull-up to V
typically –6µA. However, an external pull-up resistor may be used when
faster rise time is required or for V
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.
RTX
LTC2904/LTC2905
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
OH
V
–1.5
MIN
140
140
CC
1.5
1.4
0.7
voltages greater than V
–1
–2.1
0.15
0.05
TYP
200
200
150
0.4
2.1
0.9
65
MAX
–2.7
130
260
260
±25
1.0
2.7
0.4
0.3
0.4
1.1
1
CC
sn29045 29045fs
.
CC
UNITS
of
3
ms
ms
µA
µA
µA
µA
µA
µs
V
V
V
V
V
V
V
V
V