AC Characteristics (Continued)(1)
-7
-10
-15
-25
Symbol Parameter
Min Max Min Max Min Max Min Max Units
tZX3
Output Buffer Enable Delay
(Slow slew rate = ON;
VCCIO = 5.0V/3.3V; CL = 35 pF)
9
9
10
12
ns
tXZ
Output Buffer Disable Delay (CL = 5 pF)
4
5
6
8
ns
tSU
Register Setup Time
3
3
4
6
ns
tH
Register Hold Time
2
3
4
6
ns
tFSU
Register Setup Time of Fast Input
3
3
2
3
ns
tFH
Register Hold Time of Fast Input
0.5
0.5
2
5
ns
tRD
Register Delay
1
2
1
2
ns
tCOMB
Combinatorial Delay
1
2
1
2
ns
tIC
Array Clock Delay
3
5
6
8
ns
tEN
Register Enable Time
3
5
6
8
ns
tGLOB
Global Control Delay
1
1
1
1
ns
tPRE
Register Preset Time
2
3
4
6
ns
tCLR
Register Clear Time
2
3
4
6
ns
tUIM
Switch Matrix Delay
1
1
2
2
ns
tRPA
Notes:
Reduced-power Adder(2)
10
11
13
15
ns
1. See ordering information for valid part numbers.
2. The tRPA parameter must be added to the tLAD, tLAC,tTIC, tACL, and tSEXP parameters for macrocells running in the reduced-
power mode.
16 ATF1502AS(L)
0995K–PLD–6/05