Introduction
1.11 VDD/VSS Rules And Guidelines
SEC ASIC
1-43
STD110
Table 1-15.
NBvdd/NBvss Parameter (Process = best, Volt =2.7V/3.6V Temp. = 0C, Llead = 1nH)
Normal
NOTE
:
pob1 means 1mA output driver cell, and pob12 means 12mA output driver cell.
Calculating the number of required power pad for total SSO from the following expression:
NVDDO1sso =
∑
NVDDOeach_sso
NVSSO1sso =
∑
NVSSOeach_sso
In the above formula,
NVDDOsso = Number of VDD2O (VDD3O) pad per total SSO buffers
NVSSOsso = Number of VSS2O (VSS3O) pad per total SSO buffers
Buffer Type
Voltage Type
Slew-Rate Medium (sm)
Slew-Rate High (sh)
NBvdd
NBvss
NBvdd
NBvss
NBvdd
NBvss
pob1 (pot1)
pob2 (pot2)
pob4 (pot4)
pob6 (pot6)
pob8 (pot8)
pob12 (pot12)
phob1 (phot1)
phob2 (phot2)
phob4 (phot4)
phob6 (phot6)
phob8 (phot8)
phob12 (phot12)
ptot1
ptot2
ptot3
2.5V Interface
176
140
102
84
72
60
382
276
134
108
98
86
434
272
203
178
142
102
84
72
60
166
104
64
44
38
32
376
180
116
–
–
–
–
–
–
–
–
–
–
–
–
–
–
160
142
116
96
–
–
168
132
118
92
160
142
116
96
–
–
104
90
86
62
236
–
–
–
–
–
130
236
–
–
–
–
–
124
3.3V Interface
5V Tolerant
–
