xcr3128a Xilinx Corp., xcr3128a Datasheet - Page 15

• Manufacturer Part Number: xcr3128a
• Description: Cpld With Enhanced Clocking
• Manufacturer: Xilinx Corp.

This product has been discontinued. Please see
XCR3128A: 128 Macrocell CPLD with Enhanced Clocking
Switching Characteristics
The test load circuit and load values for the AC Electrical Characteristics are illustrated below.
15
Figure 6: t
t
PD_PAL
(ns)
V
IN
6.1
6.0
5.9
5.8
5.7
5.6
5.5
5.4
5.3
5.2
5.1
1
V
DD
PD_PAL
S1
2
= 3.3V, 25 C
V
DD
S2
R1
R2
4
vs. Outputs Switching
NUMBER OF OUTPUTS SWITCHING
C1
8
V
OUT
12
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SP00698
www.xilinx.com
1-800-255-7778
16
NOTE: For t
measured 0.5V from steady state active level.
Measurement
Component
Figure 7: Voltage Waveform
Table 7: t
(V
Typical (ns)
Number of
CC
Outputs
MEASUREMENTS:
All circuit delays are measured at the +1.5V level of
inputs and outputs, unless otherwise specified.
t
t
R1
R2
C1
PZH
PZL
t
P
= 3.3 V, T = 25°C)
+3.0V
PHZ
0V
PD_PAL
and t
5.3
1
PLZ
vs. Number of Outputs Switching
1.5ns
Values
C = 5 pF, and 3-state levels are
Closed
Closed
5.3
390
390
Open
35 pF
for details.
Input Pulses
2
S1
t
R
DS035 (v1.3) October 9, 2000
5.4
4
t
F
5.6
8
1.5ns
90%
Closed
Closed
Open
5.9
S2
SP00368
12
10%
SP00699
6.1
16
R