PLUS
ProASIC
Flash Family FPGAs
Tristate Buffer Delays
EN
A
PA D
OTBx
50% 50%
35pF
EN
A
50% 50%
EN
PAD
50% 50%
VOH
VDDP
VOH
50%
VOL
90%
50%
PAD
50%
PAD
GND
10%
50%
VOL
tDLH
tENZL
tENZH
tDHL
Figure 1-26 • Tristate Buffer Delays
Table 1-25 • Worst-Case Commercial Conditions
VDDP = 3.0 V, VDD = 2.3 V, 35 pF load, TJ = 70°C
Max
Max
Max3
tENZH
Max4
tENZL
1
2
tDLH
tDHL
Macro Type
OTB33PH
OTB33PN
OTB33PL
OTB33LH
OTB33LN
OTB33LL
Notes:
Description
Std. –F Std. –F Std. –F Std. –F Units
3.3 V, PCI Output Current, High Slew Rate
3.3 V, High Output Current, Nominal Slew Rate
3.3 V, High Output Current, Low Slew Rate
3.3 V, Low Output Current, High Slew Rate
3.3 V, Low Output Current, Nominal Slew Rate
3.3 V, Low Output Current, Low Slew Rate
2.0 2.4 2.2 2.6 2.2 2.6 2.0 2.4
2.2 2.6 2.9 3.5 2.4 2.9 2.1 2.5
2.5 3.0 3.2 3.9 2.7 3.3 2.8 3.4
2.6 3.1 4.0 4.8 2.8 3.4 3.0 3.6
2.9 3.5 4.3 5.2 3.2 3.8 4.1 4.9
3.0 3.6 5.6 6.7 3.3 3.9 5.5 6.6
ns
ns
ns
ns
ns
ns
1. tDLH=Data-to-Pad High
2. tDHL=Data-to-Pad Low
3. tENZH=Enable-to-Pad, Z to High
4. tENZL = Enable-to-Pad, Z to Low
5. All –F parts are only available as commercial.
Table 1-26 • Worst-Case Commercial Conditions
VDDP = 2.3 V, VDD = 2.3 V, 35 pF load, TJ = 70°C
Max
Max
Max3
tENZH
Max4
tENZL
1
2
tDLH
tDHL
Macro Type
Description
2.5 V, Low Power, High Output Current, High Slew Rate5
2.5 V, Low Power, High Output Current, Nominal Slew Rate5 2.4 2.9 3.0 3.6 2.7 3.2 2.1 2.5
Std. –F Std. –F Std. –F Std. –F Units
OTB25LPHH
OTB25LPHN
OTB25LPHL
OTB25LPLH
OTB25LPLN
OTB25LPLL
Notes:
2.0 2.4 2.1 2.5 2.3 2.7 2.0 2.4
ns
ns
ns
ns
ns
ns
2.5 V, Low Power, High Output Current, Low Slew Rate5
2.5 V, Low Power, Low Output Current, High Slew Rate5
2.9 3.5 3.2 3.8 3.1 3.8 2.7 3.2
2.7 3.3 4.6 5.5 3.0 3.6 2.6 3.1
2.5 V, Low Power, Low Output Current, Nominal Slew Rate5 3.5 4.2 4.2 5.1 3.8 4.5 3.8 4.6
2.5 V, Low Power, Low Output Current, Low Slew Rate5
4.0 4.8 5.3 6.4 4.2 5.1 5.1 6.1
1. tDLH=Data-to-Pad High
2. tDHL=Data-to-Pad Low
3. tENZH=Enable-to-Pad, Z to High
4. tENZL = Enable-to-Pad, Z to Low
5. Low power I/O work with VDDP=2.5 V 10% only. VDDP=2.3 V for delays.
6. All –F parts are only available as commercial.
1-42
v5.2
ACTEL [ Actel Corporation ]
