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CAT140169MWI-GT3 데이터시트(PDF) 5 Page - Catalyst Semiconductor

부품명 CAT140169MWI-GT3
상세설명  Voltage Supervisor with I2C Serial CMOS EEPROM
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제조업체  CATALYST [Catalyst Semiconductor]
홈페이지  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

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CAT140xx
© 2006 Catalyst Semiconductor, Inc.
5
Doc. No. 1117 Rev. A
Characteristics subject to change without notice
PIN DESCRIPTION
RESET/RESET
¯¯¯¯¯¯ :
RESET OUTPUT
This output is available in two versions: CMOS
Active Low (CAT140xx9) and CMOS Active High
(CAT140xx1). Both versions are push-pull outputs
for high efficiency.
SDA:
SERIAL DATA ADDRESS
The Serial Data I/O pin receives input data and
transmits data stored in EEPROM. In transmit mode,
this pin is open drain. Data is acquired on the
positive edge, and is delivered on the negative edge
of SCL.
SCL:
SERIAL CLOCK
The Serial Clock input pin accepts the Serial Clock
generated by the Master.
A0, A1, A2:
Device Address Inputs
The Address inputs set the device address when
cascading multiple devices. When not driven, these
pins are pulled LOW internally.
DEVICE OPERATION
The CAT140xx products combine the accurate
voltage monitoring capabilities of a standalone
voltage supervisor with the high quality and reliability
of standard EEPROMs from Catalyst Semiconductor.
RESET CONTROLLER DESCRIPTION
The reset signal is asserted LOW for the CAT140xx9
and HIGH for the CAT140xx1 when the power
supply voltage falls below the threshold trip voltage
and remains asserted for at least 140ms (tPURST) after
the power supply voltage has risen above the threshold.
Reset output timing is shown in Figure 1.
The CAT140xx devices protect
μPs against brownout
failure. Short duration VCC transients of 4μsec or less
and 100mV amplitude typically do not generate a Reset
pulse.
Figure 2 shows the maximum pulse duration of negative-
going VCC transients that do not cause a reset condition.
As the amplitude of the transient goes further below the
threshold (increasing VTH - VCC), the maximum pulse
duration decreases. In this test, the VCC starts from
an initial voltage of 0.5V above the threshold and
drops below it by the amplitude of the overdrive voltage
(VTH - VCC).
Figure 2. Maximum Transient Duration Without
Causing a Reset Pulse vs. Overdrive Voltage
Figure 1. RESET Output Timing
RESET OVERDRIVE VTH - VCC [mV]
TAMB = 25ºC
CAT140xxM
CAT140xxZ
VCC
PURST
t
PURST
t
RPD
t
RVALID
V
V
TH
RESE T
RESE T
CAT140xx9
CAT140xx1
RPD
t


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