QL82SD Datasheet, PDF (44/60 Pages) List of Unclassifed Manufacturers – 10 High Speed Bus LVDS Serial Links bandwidth up to 5 Gbps

QL82SD Device Data Sheet Rev C
.
Table 35: 2.5 V Slew Rate
VCCIO = 2.5 V
Fast Slew
Rising Edge
1.7 V/nS
Falling Edge
1.9 V/nS
Slow Slew
0.6 V/vS
0.6 V/nS
NOTE: Condition: 2.5 V, 25 °C
Programmable Weak-Pull
Programmable weak pull-down resistors are available on each I/O. I/O Weak Pull-Down
eliminates the need for an external pull-down resistor for used I/O. The spec for pull-down
current is a maximum of 150 uA under a worst case condition. -148 uA @ 3.6 V, -55 °C,
- 69 uA@ 2.5 V, 25 °C. Figure 53 illustrates the weak pull-down circuit.
I/O
Register 1
PAD
Figure 53: I/O Weak Pull-Down Circuit
I/O Control and Local Hi-Drives
Each bank of I/Os has two input-only pins that can be programmed to drive the RST, CLK,
and EN inputs of I/O's in that bank. These input-only pins also double up as high-drive inputs
to a quadrant. Both as an I/O control or high-drive, these buffers can be driven by the
internal logic. The I/O control network and local high-drive performance is indicated in
Table 36.
Table 36: I/O Control Network/ Local Hi-Drive Performance
TT, 25C, 2.5V
From Pad
From Array
I/O (slow)
1.00 ns
1.14 ns
I/O (fast)
0.63 ns
0.78 ns
Skew
0.37 ns
0.36 ns
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Preliminary
© 2002 QuickLogic Corporation