Detailed Specifications
2- 28
R e v i sio n 1 8
LVTTL Output Drive Strength =3 (16 mA) / Low Slew Rate
tDP
Input Buffer
1.68
1.92
2.26
ns
tPY
Output Buffer
11.03
12.56
14.77
ns
tENZL
Enable to Pad Delay through the Output Buffer—Z to
Low
11.42
13.01
15.29
ns
tENZH
Enable to Pad Delay through the Output Buffer—Z to
High
11.04
12.58
14.79
ns
tENLZ
Enable to Pad Delay through the Output Buffer—Low
to Z
1.86
1.88
ns
tENHZ
Enable to Pad Delay through the Output Buffer—High
to Z
2.50
2.51
2.52
ns
tIOCLKQ
Sequential Clock-to-Q for the I/O Input Register
0.67
0.77
0.90
ns
tIOCLKY
Clock-to-output Y for the I/O Output Register and the
I/O Enable Register
0.67
0.77
0.90
ns
tSUD
Data Input Set-Up
0.23
0.27
0.31
ns
tSUE
Enable Input Set-Up
0.26
0.30
0.35
ns
tHD
Data Input Hold
0.00
ns
tHE
Enable Input Hold
0.00
ns
tCPWHL
Clock Pulse Width High to Low
0.39
ns
tCPWLH
Clock Pulse Width Low to High
0.39
ns
tWASYN
Asynchronous Pulse Width
0.37
ns
tREASYN
Asynchronous Recovery Time
0.13
0.15
0.17
ns
tHASYN
Asynchronous Removal Time
0.00
ns
tCLR
Asynchronous Clear-to-Q
0.23
0.27
0.31
ns
tPRESET
Asynchronous Preset-to-Q
0.23
0.27
0.31
ns
Table 2-22 3.3 V LVTTL I/O Module
Worst-Case Commercial Conditions VCCA = 1.425 V, VCCI = 3.0 V, TJ = 70°C (continued)
–2 Speed
–1 Speed
Std Speed
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max. Units