HC311 Datasheet, PDF (5/26 Pages) Altera Corporation – HardCopy III Device

Chapter 1: DC and Switching Characteristics of HardCopy III Devices
1–3
Electrical Characteristics
Figure 1–1 shows the methodology to determine the overshoot duration. The
overshoot voltage is displayed in red and is present at the HardCopy III pin, up to
4.1 V. From Table 1–2, for an overshoot of up to 4.1 V, the percentage of high time for
overshoot > 3.15 V can be as high as 46% over an 11.4 year period. The percentage of
high-time is calculated as (delta T/T) × 100. This 11.4 year period assumes the device
is always turned on with 100% I/O toggle rate and 50% duty cycle signal. For lower
I/O toggle rates and situations where the device is in an idle state, lifetimes are
increased.
Figure 1–1. Overshoot Duration
4.1 V
3.15 V
3.0 V
ΔT
T
Recommended Operating Conditions
This section lists the functional operation limits for AC and DC parameters for
HardCopy III devices. The steady-state voltage and current values expected from
HardCopy III devices are provided in Table 1–3. All supplies are required to
monotonically reach their full-rail values within t_RAMP maximum. Allowed ripple on
power supplies is bounded by the minimum and maximum specifications listed in
Table 1–3.
Table 1–3. HardCopy III Device Recommended Operating Conditions – Preliminary (Part 1 of 2)
Symbol
Parameter
Conditions Minimum Typical
Maximum
Unit
V_CCL (1)
Core voltage power supply for
internal logic and input buffers
—
0.87
0.9
0.93
V
V_CC (1)
I/O registers power supply
—
0.87
0.9
0.93
V
V_{CCD_PLL} (1) PLL digital power supply
—
0.87
0.9
0.93
V
V_{C CA_ PLL}
PLL analog power supply
—
2.375
2.5
2.625
V
V_CCPT (2)
Power supply for the temperature
sensing diode
—
2.375
2.5
2.625
V
Configuration pins power supply,
—
3.0 V
2.85
3.0
3.15
V
V_{C CPGM}
Configuration pins power supply,
2.5 V
—
2.375
2.5
2.625
V
Configuration pins power supply,
—
1.8 V
1.71
1.8
1.89
V
© December 2008 Altera Corporation
HardCopy III Device Handbook, Volume 3