1
DICE SPECIFICATION
LTC2904/LTC2905
Precision Dual Supply Monitors
with Pin-Selectable Thresholds
DIE CROSS REFERENCE
Order DICE CANDIDATE
Part Number Below
LTC Finished
Part Number
LTC2904CDDB
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
LTC2904 DICE
PAD FUNCTION
1. GND
2. RST
3. RST/TMR
4. V2
5. GND
6. V1
7. S2
8. S1
9. TOL
Note: Connect Backside
Substrate to GND
83 × 23 mils
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
ELECTRICAL CHARACTERISTICS
V1 = 2.5V, V2 = 1V, S1 = TOL = V1, S2 = 0V, unless otherwise noted.
(Notes 1, 2)
SYMBOL PARAMETER CONDITIONS MIN MAX UNITS
V
RT50
5V, 5% Reset Threshold V1 Input Threshold 4.600 4.750 V
5V, 7.5% Reset Threshold 4.475 4.625 V
5V, 10% Reset Threshold 4.350 4.500 V
V
RT33
3.3V, 5% Reset Threshold V1, V2 Input Threshold 3.036 3.135 V
3.3V, 7.5% Reset Threshold 2.954 3.053 V
3.3V, 10% Reset Threshold 2.871 2.970 V
V
RT25
2.5V, 5% Reset Threshold V1, V2 Input Threshold 2.300 2.375 V
2.5V, 7.5% Reset Threshold 2.238 2.313 V
2.5V, 10% Reset Threshold 2.175 2.250 V
V
RT18
1.8V, 5% Reset Threshold V2 Input Threshold 1.656 1.710 V
1.8V, 7.5% Reset Threshold 1.611 1.665 V
1.8V, 10% Reset Threshold 1.566 1.620 V
V
RT15
1.5V, 5% Reset Threshold V2 Input Threshold 1.380 1.425 V
1.5V, 7.5% Reset Threshold 1.343 1.388 V
1.5V, 10% Reset Threshold 1.305 1.350 V
V
RT12
1.2V, 5% Reset Threshold V2 Input Threshold 1.104 1.140 V
1.2V, 7.5% Reset Threshold 1.074 1.110 V
1.2V, 10% Reset Threshold 1.044 1.080 V
V
RT10
1V, 5% Reset Threshold V2 Input Threshold 0.920 0.950 V
1V, 7.5% Reset Threshold 0.895 0.925 V
1V, 10% Reset Threshold 0.870 0.900 V
LTC2905CDDB LTC2905 DICE
1
2
3
4
5
6
7
8
9
DICE SPECIFICATION
LTC2904/LTC2905
2 LT 1105 PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005
Wafer level testing is performed per the indicated specifications for dice. Considerable differences in performance can often be observed for dice versus
packaged units due to the influences of packaging and assembly on certain devices and/or parameters. Please consult factory for more information on
dice performance and lot qualifications via lot sampling test procedures.
Dice data sheet subject to change. Please consult factory for current revision in production.
I.D.No. 66-13-29045
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
ELECTRICAL CHARACTERISTICS
V1 = 2.5V, V2 = 1V, S1 = TOL = V1, S2 = 0V, unless otherwise noted.
(Notes 1, 2)
Note 1: The greater of V1, V2 is the internal supply voltage (V
CC
).
Note 2: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 3: The output pins RST and RST have an internal pull-up to V
CC
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
CC
.
Note 4: 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.
SYMBOL PARAMETER CONDITIONS MIN MAX UNITS
V
CCMIN
Minimum Internal Operating Voltage (Note 1) RST in Correct Logic State 1 V
I
V1
V1 Input Current Includes Input Current to Three-State Pins 130 µA
I
V2
V2 Input Current 1.0 µA
I
TMR(UP)
TMR Pull-Up Current (LTC2905) V
TMR
= 0V –1.5 –2.7 µA
I
TMR(DOWN)
TMR Pull-Down Current (LTC2905) V
TMR
= 1.4V 1.5 2.7 µA
t
RST
Reset Time-Out Period (LTC2904) 140 260 ms
t
RST
Reset Time-Out Period (LTC2905) C
TMR
= 22nF 140 260 ms
V
OL
Output Voltage Low RST, RST I = 2.5mA 0.4 V
I = 100µA; V1 = 1V (RST Only) 0.3 V
V
OH
Output Voltage High RST, RST I = –1µAV
CC
–1 V
(Notes 1, 3)
Three-State Inputs S1, S2, 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 Open State I = –10µA 0.7 V
I = 10µA 1.1 V
I
VPG
Programming Input Current (Note 4) ±25 µA