LTC2908CTS8-B1#TRMPBF Linear Technology, LTC2908CTS8-B1#TRMPBF Datasheet

IC MON SIX SUPPLY PREC TSOT23-8

LTC2908CTS8-B1#TRMPBF

Manufacturer Part Number
LTC2908CTS8-B1#TRMPBF
Description
IC MON SIX SUPPLY PREC TSOT23-8
Manufacturer
Linear Technology
Type
Multi-Voltage Supervisorr
Datasheet

Specifications of LTC2908CTS8-B1#TRMPBF

Number Of Voltages Monitored
6
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
160 ms Minimum
Voltage - Threshold
1.403V, 1.683V, 2.338V, 3.086V, Adj, Adj
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-8, TSOT-8
Voltage Supervisor Type
Voltage Monitor
Number Of Voltage Supervisors
6
Operating Supply Voltage (min)
0.5V
Operating Supply Voltage (max)
6V
Package Type
TSOT-23
Operating Temperature Classification
Commercial
Operating Temp Range
0C to 70C
Pin Count
8
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LTC2908CTS8-B1#PBF
LTC2908CTS8-B1#PBF

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC2908CTS8-B1#TRMPBFLTC2908CTS8-B1
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC2908CTS8-B1#TRMPBFLTC2908CTS8-B1#TRPBF
Manufacturer:
LINEAR
Quantity:
3 385
Company:
Part Number:
LTC2908CTS8-B1#TRMPBFLTC2908CTS8-B1#TRPBF
Manufacturer:
LT/凌特
Quantity:
20 000
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APPLICATIONS
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TYPICAL APPLICATION
FEATURES
Ultralow Voltage Reset: V
Monitors Six Inputs Simultaneously:
5V, 3.3V, 2.5V, 1.8V, ADJ1, ADJ2 (LTC2908-A1)
3.3V, 2.5V, 1.8V, 1.5V, ADJ1, ADJ2 (LTC2908-B1)
2.5V, ADJ1, ADJ2, ADJ3, ADJ4, ADJ5 (LTC2908-C1)
Guaranteed Threshold Accuracy: ±1.5% of
Monitored Voltage Overtemperature
Internal V
Power Supply Glitch Immunity
200ms Reset Time Delay
Active Low Open-Drain RST Output
Low Profi le (1mm) 8-Lead SOT-23 (ThinSOT™) and
Plastic (3mm × 2mm) DFN Packages
Network Servers
Wireless Base Stations
Optical Networking Systems
Multivoltage Systems
Desktop and Notebook Computers
DC/DC
DC/DC
DC/DC
DC/DC
DC/DC
CC
12V
3.3V
2.5V
1.8V
1.5V
1.2V
Six Supply Monitor with 5% Tolerance
Auto Select
(12V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V)
V1
0.1μF
0.1μF
V2 V3 V4
LTC2908-B1
CC
GND
= 0.5V Guaranteed*
2.15M
V
ADJ1
100k
124k
V
ADJ2
RST
100k
2908 TA01a
SYSTEM
DESCRIPTION
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. *Patent pending.
The LTC
requiring a precise and compact monitoring solution
for multiple supply voltages. The inputs can be shorted
together for monitoring systems with fewer than six
supply voltages, and the open drain RST output of two or
more LTC2908s can be wired-OR together for monitoring
systems with more than six supply voltages. The common
reset output remains low until all six inputs have been in
compliance for 200ms.
The LTC2908 features a tight 1.5% threshold accuracy over
the entire operating temperature range and glitch immunity
to ensure reliable reset operation without false triggering.
The open-drain RST output state is guaranteed to be in the
correct state as long as V1 and/or V2 is 0.5V or greater.
The LTC2908 also features adjustable inputs with a nominal
threshold level at 0.5V. This product provides a precise,
space-conscious, micropower and general purpose solu-
tion for any kind of system requiring supply monitors.
Six Input Supply Monitor
®
2908 is a six input supply monitor for systems
0.3
0.2
0.1
0.4
0
0
with 10k Pull-Up Resistor to V1
RST Output Voltage vs V1
0.2
V2 = V1 (A1/B1)
V1 INPUT
V1 (V)
0.4
V2 = GND
V3 = V4 = V
V
V
ADJ2
ADJ4
= V
= V
Precision
0.6
LTC2908
ADJ3
ADJ5
ADJ1
=
= GND
2908 TA01b
=
0.8
2908fd
1

Related parts for LTC2908CTS8-B1#TRMPBF

LTC2908CTS8-B1#TRMPBF Summary of contents

Page 1

... L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Patent pending. ...

Page 2

... LTC2908IDDB-B1#TRPBF LTC2908CDDB-C1#TRMPBF LTC2908CDDB-C1#TRPBF LTC2908IDDB-C1#TRMPBF LTC2908IDDB-C1#TRPBF LTC2908CTS8-A1#TRMPBF LTC2908CTS8-A1#TRPBF LTC2908ITS8-A1#TRMPBF LTC2908ITS8-A1#TRPBF LTC2908CTS8-B1#TRMPBF LTC2908CTS8-B1#TRPBF LTC2908ITS8-B1#TRMPBF LTC2908ITS8-B1#TRPBF LTC2908CTS8-C1#TRMPBF LTC2908CTS8-C1#TRPBF LTC2908ITS8-C1#TRMPBF LTC2908ITS8-C1#TRPBF TRM = 500 pieces. *Temperature grades are identifi label on the shipping container. Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. ...

Page 3

ELECTRICAL CHARACTERISTICS operating temperature range, otherwise specifi cations are T SYMBOL PARAMETER V 5V, 5% Reset Threshold RT50 V 3.3V, 5% Reset Threshold RT33 V 2.5V, 5% Reset Threshold RT25 V 1.8V, 5% Reset Threshold RT18 V ADJ, 5% Reset ...

Page 4

LTC2908 ELECTRICAL CHARACTERISTICS l The denotes specifi cations which apply over the full operating temperature range, otherwise specifi cations are T for the LT2908-A1 3.3V for the LTC2908- SYMBOL PARAMETER t Reset Time-Out Period RST ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Specifi cations are 25°C unless otherwise noted. A 1.8V Threshold Voltage vs Temperature 1.710 1.700 1.690 1.680 1.670 1.660 –50 – TEMPERATURE (°C) 2908 G04 I vs Temperature V1 33 ...

Page 6

LTC2908 TYPICAL PERFORMANCE CHARACTERISTICS Specifi cations are 25°C unless otherwise noted. A RST Output Voltage vs V1 with 10k Pull-Up Resistor (A1/B1 2.5V (A1)/V3 = 1.8V (B1 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Specifi cations are 25°C unless otherwise noted. A RST Pull-Up Current vs Supply Voltage – (A1/B1 V1(C1 2.5V (A1)/V3 = 1.8V (B1) V4 ...

Page 8

LTC2908 PIN FUNCTIONS (TS8 Package/DDB8 Package) LTC2908-C1 V1 (Pin 1/Pin 4): Voltage Input the internal V The operating voltage on this pin shall not exceed 6V. When in normal operation, this pin draws approximately 22μA. Bypass this ...

Page 9

BLOCK DIAGRAMS V1 V ADJ1 V ADJ2 V ADJ3 V ADJ4 V ADJ5 GND TIMING DIAGRAM RST – – – – – – BANDGAP REFERENCE V Monitor Timing ...

Page 10

LTC2908 APPLICATIONS INFORMATION Supply Monitoring The LTC2908 is a low power, high accuracy, six input supply monitoring circuit with two adjustable inputs. The reset delay is set to a nominal of 200ms with an internal capacitor, eliminating the need for ...

Page 11

APPLICATIONS INFORMATION Adjustable Input The noninverting input on the V ADJ 0.5V. And the high impedance inverting input directly ties to the V pin. ADJ In a typical application, this pin connects to a tap point on an external resistive ...

Page 12

LTC2908 APPLICATIONS INFORMATION With this variation of reset threshold in mind, the nominal reset threshold of the supervisor resides below the minimum supply voltage; just enough so that the reset threshold band and the power supply tolerance bands do not ...

Page 13

APPLICATIONS INFORMATION RST Output Characteristics The DC characteristics of the RST pull-up and pull-down strength are shown in the Typical Performance Character- istics section. The RST output has a weak internal pull- Max(V1, V2) and a strong ...

Page 14

LTC2908 TYPICAL APPLICATIONS Quad Supply Monitor with One Adjustable Input, 5% Tolerance, 3.3V, 2.5V, 1.8V, 1.2V Pin Programmable Dual Supply Monitor with Possible Future Expansion up to Six Supplies, 5% Tolerance, 3.3V and 2.5V Six Supply Monitor, 5% Tolerance 12V, ...

Page 15

PACKAGE DESCRIPTION 0.61 ±0.05 (2 SIDES) 0.70 ±0.05 2.55 ±0.05 1.15 ±0.05 0.25 ± 0.05 0.50 BSC 2.20 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING CONFORMS TO VERSION (WECD-1) IN JEDEC PACKAGE OUTLINE M0-229 2. ...

Page 16

LTC2908 PACKAGE DESCRIPTION 0.52 MAX 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF ...

Page 17

... Revised Tape and Reel Part Numbers 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 18

... Tolerances, 8-Lead SOT-23 and DFN Packages 0.5V Adjustable Threshold, Reset and Three Supply Tolerances, 8-Lead SOT-23 and DFN Packages Shunt Regulated V Pin, Adjustable Threshold and CC Reset, 8-Lead SOT-23 and DFN Packages LT 0210 REV D • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2004 2908fd ...

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