Table 2-34 A54SX32A Timing Characteristics (Worst-Case Commercial Conditions V
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寤犲晢锛� Microsemi SoC
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妯欐簴鍖呰锛� 160
绯诲垪锛� SX-A
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杓稿叆/杓稿嚭鏁�(sh霉)锛� 111
闁€鏁�(sh霉)锛� 24000
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SX-A Family FPGAs
v5.3
2-41
Table 2-34 A54SX32A Timing Characteristics
(Worst-Case Commercial Conditions VCCA = 2.25 V, VCCI = 4.75 V, TJ = 70掳C)
Parameter
Description
鈥�3 Speed1
鈥�2 Speed
鈥�1 Speed
Std. Speed
鈥揊 Speed
Units
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
5 V PCI Output Module Timing2
tDLH
Data-to-Pad Low to High
2.1
2.4
2.8
3.2
4.5
ns
tDHL
Data-to-Pad High to Low
2.8
3.2
3.6
4.2
5.9
ns
tENZL
Enable-to-Pad, Z to L
1.3
1.5
1.7
2.0
2.8
ns
tENZH
Enable-to-Pad, Z to H
2.1
2.4
2.8
3.2
4.5
ns
tENLZ
Enable-to-Pad, L to Z
3.0
3.5
3.9
4.6
6.4
ns
tENHZ
Enable-to-Pad, H to Z
2.8
3.2
3.6
4.2
5.9
ns
dTLH
3
Delta Low to High
0.016
0.02
0.022
0.032
ns/pF
dTHL
3
Delta High to Low
0.026
0.03
0.032
0.04
0.052
ns/pF
5 V TTL Output Module Timing4
tDLH
Data-to-Pad Low to High
1.9
2.2
2.5
2.9
4.1
ns
tDHL
Data-to-Pad High to Low
2.5
2.9
3.3
3.9
5.4
ns
tDHLS
Data-to-Pad High to Low鈥攍ow slew
6.6
7.6
8.6
10.1
14.2
ns
tENZL
Enable-to-Pad, Z to L
2.1
2.4
2.7
3.2
4.5
ns
tENZLS
Enable-to-Pad, Z to L鈥攍ow slew
7.4
8.4
9.5
11.0
15.4
ns
tENZH
Enable-to-Pad, Z to H
1.9
2.2
2.5
2.9
4.1
ns
tENLZ
Enable-to-Pad, L to Z
3.6
4.2
4.7
5.6
7.8
ns
tENHZ
Enable-to-Pad, H to Z
2.5
2.9
3.3
3.9
5.4
ns
dTLH
3
Delta Low to High
0.014
0.017
0.023
0.031
ns/pF
dTHL
3
Delta High to Low
0.023
0.029
0.031
0.037
0.051
ns/pF
dTHLS
3
Delta High to Low鈥攍ow slew
0.043
0.046
0.057
0.066
0.089
ns/pF
Notes:
1. All 鈥�3 speed grades have been discontinued.
2. Delays based on 50 pF loading.
3. To obtain the slew rate, substitute the appropriate Delta value, load capacitance, and the VCCI value into the following equation:
Slew Rate [V/ns] = (0.1*VCCI 鈥� 0.9*VCCI)/ (Cload * dT[LH|HL|HLS])
where Cload is the load capacitance driven by the I/O in pF
dT[LH|HL|HLS] is the worst case delta value from the datasheet in ns/pF.
4. Delays based on 35 pF loading.
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
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