SMM764
Preliminary Information
AC OPERATING CHARICTERISTICS
Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND. See Figure 5
and 6 Timing diagrams.
Symbol
Description
Conditions
Min
Typ
Max
Unit
tDPON = 0.64ms
Programmable power-on delay
from restart timer expiration to
PUPX active.
tDPON = 12.5ms
tDPON = 25ms
tDPON
-25
tDPON
+25
%
t
DPON = 50ms
Programmable power-off delay
from VMX off to PUPX inactive
tDPOFF = 0.64ms
tDPOFF = 12.5ms
tPRTO = 0.64ms
tDPOFF
-25
-25
tDPOFF
+25
+25
%
%
tPRTO = 25ms
Programmable reset time-out delay
tPRTO
tPRTO
tPRTO = 100ms
tPRTO = 200ms
tSTT = OFF
Programmable sequence
termination timer
tSTT = 100ms
tSTT
-25
tSTT
+25
%
tSTT = 200ms
tSTT = 400ms
Time from restart timer
expiration to PUPX active
after a fault-triggered power-
off or force-shutdown.
Fault-triggered restart delay
tFTRD
tFTRDACC
tCTRD
2.4
s
Fault-triggered restart delay
accuracy
-25
-25
tFTRD
12.5
+25
+25
%
Time from restart timer
expiration to PUPX active
after command-triggered
power-off or force-shutdown.
Command-triggered restart delay
ms
Command-triggered restart delay
accuracy
tCTRDACC
TADC
tCTRD
2.0
%
Time for ADC conversion of
all 9 channels
10-bit ADC sampling period
ms
Update period for ADOC of
channels
ADOC sampling period
TDC_CONTROL
1.7
850
85
ms
ms
ms
A – D
Slow Margin, + 10% change
in voltage with 0.1% ripple
TRIM_CAP=1µF
tMARGIN
Margin Time from Nominal
Fast Margin, + 10% change
in voltage with 0.1% ripple
TRIM_CAP=1µF
Summit Microelectronics, Inc
2098 1.1 6/29/2005
11
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
