Rainbow Electronics ATF16V8CZ - Manual (Page 5)

ATF16V8CZ
5
Input Test Waveforms and
Measurement Levels
t
R
, t
F
< 1.5 ns (10% to 90%)
Output Test Loads
Note: Similar devices are tested with slightly different loads.
These load differences may affect output signals’ delay
and slew rate. Atmel devices are tested with sufficient
margins to meet compatible devices.
Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
Power-up Reset
The ATF16V8CZ’s registers are designed to reset during
power-up. At a point delayed slightly from V
CC
crossing
V
RST
, all registers will be reset to the low state. As a result,
the registered output state will always be high on power-up.
This feature is critical for state machine initialization.
However, due to the asynchronous nature of reset and the
uncertainty of how V
CC
actually rises in the system, the
following conditions are required:
1. The V
CC
rise must be monotonic, from below 0.7V,
2. After reset occurs, all input and feedback setup
times must be met before driving the clock term
high, and
3. The signals from which the clock is derived must
remain stable during t
PR
.
Pin Capacitance
f = 1 MHz, T = 25
°
C (1)
Typ Max Units Conditions
C
IN
5 8 pF V
IN
= 0V
C
OUT
6 8 pF V
OUT
= 0V
Parameter Description Typ Max Units
t
PR
Power-up Reset Time 600 1,000 ns
V
RST
Power-up Reset Voltage 3.8 4.5 V