Datasheet Linear Technology LTC2938HMS#PBF — Ficha de datos

Fabricante	Linear Technology
Serie	LTC2938
Numero de parte	LTC2938HMS#PBF

Monitores configurables de 4 suministros con temporizador de vigilancia

Hojas de datos

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PDF, 259 Kb, Archivo subido: oct 25, 2017

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Precios

Embalaje

Package	MS-12
Package Code	MS
Package Index	05-08-1668

Paramétricos

Export Control	no
Features	Supervisor
Fourth Reset Voltage	1.8V, 1.5V, 1.2V, Adj, -Adj
Isupply	80 µA
Minimum Reset Level	1 V
Number of Supplies	4
Operating Temperature Range	-40 to 125 °C
Power Fail Warning	no
Power Up/Down Reset	no
Reset Voltage	5V, 3.3V
Second Reset Voltage	3.3V, 2.5V, 1.8V, 1.5V, 1.2V
Third Reset Voltage	2.5V, 1.8V, 1.5V, 1.2V, Adj
Threshold Accuracy	1.5 %
Vs Max	6 V
Watchdog Timer	yes

Plan ecológico

RoHS

Obediente

Otras opciones

LTC2939

Artículos

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4- and 6-Supply Monitors Feature ±1.5% Accuracy and Watchdog Timers for Rails Down to 1.2V &mdash LT Journal
PDF, 826 Kb, Archivo publicado: oct 27, 2010
Extracto del documento
design features 4-and 6-Supply Monitors Feature В±1.5% Accuracy and
Watchdog Timers for Rails Down to 1.2V
A. Ng Two new power supply monitors from Linear Technology, the LTC2938 and LTC2939,
are specifically designed to monitor lower supply voltages (down to 1.2V) in multivoltage
systems. The LTC2938 and LTC2939 share the same architecture and differ only in
the number of voltages monitored. The LTC2938 is a 4-supply monitor and comes in
compact 12-pin MSOP and DFN packages. The LTC2939 monitors six supplies and
is offered in a 16-pin MSOP package. Both monitors have a tight threshold accuracy
of 1.5% over the operating temperature range, which eases the voltage headroom
requirements of circuits powered by the monitored supplies and is much tighter than
supply monitors from other manufacturers. Neither monitor requires external calibration
or trimming. Both parts are designed for systems with 5% power supply tolerance.
The watchdog circuit in these monitors includes a watchdog input (WDI)
and a watchdog output (WDO), which
facilitates microprocessor monitoring
and control. The WDO output is latched
low in the event of a watchdog timeout
and allows the microprocessor to distinguish between resets caused by a supply
undervoltage from those due to software
malfunction. Both devices feature reset
and watchdog timers that can be arbitrarily adjusted using external capacitors
for greater flexibility in system design. SINGLE PIN SELECTS FROM
16 POSSIBLE THRESHOLD …

Linea modelo

Serie: LTC2938 (12)

LTC2938CDE#PBF LTC2938CDE#TRPBF LTC2938CMS#PBF LTC2938CMS#TRPBF LTC2938HDE#PBF LTC2938HDE#TRPBF LTC2938HMS#PBF LTC2938HMS#TRPBF LTC2938IDE#PBF LTC2938IDE#TRPBF LTC2938IMS#PBF LTC2938IMS#TRPBF

Clasificación del fabricante

Monitor, Control and Protection > Supervisory Circuits > Quad or More Supply Monitors
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) System Monitor

Otros nombres:

LTC2938HMSPBF, LTC2938HMS PBF