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ISPLSI3448 Datasheet(PDF) 6 Page - Lattice Semiconductor

Part No. ISPLSI3448
Description  In-System Programmable High Density PLD
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Maker  LATTICE [Lattice Semiconductor]
Homepage  http://www.latticesemi.com
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 6 page
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Specifications ispLSI 3448
6
External Switching Characteristics1, 2, 3
Over Recommended Operating Conditions
tpd1
UNITS
-90
MIN.
TEST
COND.
1. Unless noted otherwise, all parameters use 20 PTXOR path and ORP.
2. Refer to Timing Model in this data sheet for further details.
3. Standard 16-bit counter using GRP feedback.
4. fmax (Toggle) may be less than 1/(twh + twl). This is to allow for a clock duty cycle of other than 50%.
5. Reference Switching Test Conditions section.
Table 2-0030/3320
1
5
3
1
tsu2 + tco1
(
)
-70
MIN.
MAX.
MAX.
DESCRIPTION
#
2
PARAMETER
A
1 Data Propagation Delay, 4PT Bypass, ORP Bypass
–
12.0
–
15.0
ns
tpd2
A
2 Data Propagation Delay
––
ns
fmax
A
3 Clock Frequency with Internal Feedback
90.0
–
70.0
–
MHz
fmax (Ext.)
–
4 Clock Frequency with External Feedback
––
MHz
fmax (Tog.)
–
5 Clock Frequency, Maximum Toggle
––
MHz
tsu1
–
6 GLB Reg. Setup Time before Clock, 4 PT Bypass
––
ns
4
tco1
A
7 GLB Reg. Clock to Output Delay, ORP Bypass
7.5
–
ns
th1
–
8 GLB Reg. Hold Time after Clock, 4 PT Bypass
––
ns
tsu2
–
9 GLB Reg. Setup Time before Clock
––
ns
tco2
–
10 GLB Reg. Clock to Output Delay
––
ns
th2
–
11 GLB Reg. Hold Time after Clock
––
ns
tr1
A
12 Ext. Reset Pin to Output Delay
––
ns
trw1
–
13 Ext. Reset Pulse Duration
––
ns
tptoeen
B
14 Input to Output Enable
––
ns
tptoedis
C
15 Input to Output Disable
––
ns
tgoeen
B
16 Global OE Output Enable
––
ns
tgoedis
C
17 Global OE Output Disable
––
ns
ttoeen
B
18 Test OE Output Enable
––
ns
ttoedis
C
19 Test OE Output Disable
––
ns
twh
–
20 Ext. Synchronous Clock Pulse Duration, High
5.0
––
ns
twl
–
21 Ext. Synchronous Clock Pulse Duration, Low
5.0
––
ns
tsu3
–
22 I/O Reg Setup Time before Ext. Synchronous Clock (Y3, Y4)
4.5
––
ns
th3
–
23 I/O Reg Hold Time after Ext. Sync Clock (Y3, Y4)
0.0
––
ns
62.5
100
7.0
0.0
8.5
0.0
9.0
15.0
8.0
14.0
25.0
25.0
10.0
10.0
13.0
13.0
–
50.0
83.0
9.0
0.0
11.0
0.0
12.0
6.0
6.0
5.0
0.0
18.0
9.0
10.0
15.0
30.0
30.0
12.0
12.0
15.0
15.0




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