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PC87372 Datasheet(PDF) 141 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87372
Description  LPC SuperI/O with Glue Functions
PDF  144 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87372 Datasheet(HTML) 141 Page - National Semiconductor (TI)

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10.0 Device Characteristics (Continued)
141
www.national.com
Revision 1.2
Figure 45. RSMRST (AC Characteristics)
Main Power Good
Rambus SCK Clock Gate Control
Power Distribution Control
Symbol Figure
Description
Reference Conditions
Min
Max
Units
tDB
−
Debouncing time1
1. Not tested. Guaranteed by design.
After RE or FE of FPRST
768 * tCP
2
2. tCP is the cycle time of the 32 KHz clock domain (see Low-Frequency Clock Timing on page 132)
832 * tCP
tPDF
−
FPRST Propagation Delay1
After RE or FE of FPRST
768 * tCP
832 * tCP
tPDP
−
PWRGD_PS Propagation Delay1
After RE or FE of
PWRGD_PS
1
µs
tR
−
Rise Time1
0.8V to 2.0V
50
ns
tF
−
Fall Time1
2.0V to 0.8V
50
ns
Symbol Figure
Description
Reference Conditions
Min
Max
Units
tPF
−
Fall Propagation Delay1
1. Not tested. Guaranteed by characterization.
PWRGD_3V to FE of
SCK_BJT_GATE
50
ns
tF
−
Fall Time
0.8V to 2.0V
15
ns
Symbol Figure
Description
Reference Conditions
Min
Max
Units
tPB
−
BKFD_CUT Propagation Delay1
1. Not tested. Guaranteed by design.
PWRGD_PS or SLP_S3 to BKFD_CUT
1
µs
tTB
−
BKFD_CUT Transition Time1
0.8V to 2.0V
50
ns
tPL
46
LATCHED_BF_CUT Propagation
Delay1
BKFD_CUT or SLP_S5 to
LATCHED_BF_CUT
1
µs
tTL
46
LATCHED_BF_CUT Transition Time1 0.8V to 2.0V
50
ns
0.8V
tRD
tFD3
VSB3
VSB3ON
tRD
tFD5
RSMRST
VSB5
VTRIP
tGA
VSB3OFF
1.4V
tF
2.0V
0.8V
1.4V
tR
2.0V
1.4V



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