AGLN250V2-ZCSG81 Actel, AGLN250V2-ZCSG81 Datasheet - Page 18

• Manufacturer Part Number: AGLN250V2-ZCSG81
• Manufacturer: Actel

IGLOO nano DC and Switching Characteristics
Figure 2-1 • V5 Devices – I/O State as a Function of V
2 -4
Deactivation trip point:
Activation trip point:
V
V
a
d
= 0.85 V ± 0.25 V
= 0.75 V ± 0.25 V
V
V
CC
CC
= 1.575 V
= 1.425 V
PLL Behavior at Brownout Condition
Actel recommends using monotonic power supplies or voltage regulators to ensure proper power-
up behavior. Power ramp-up should be monotonic at least until V
activation levels (see
When PLL power supply voltage and/or V
0.25 V for V5 devices, and 0.75 V ± 0.2 V for V2 devices), the PLL output lock signal goes LOW
and/or the output clock is lost. Refer to the "Brownout Voltage" section in the
Behavior of Low-Power Flash Devices
information on clock and lock recovery.
Internal Power-Up Activation Sequence
To make sure the transition from input buffers to output buffers is clean, ensure that there is no
path longer than 100 ns from input buffer to output buffer in your design.
V
1. Core
2. Input buffers
3. Output buffers, after 200 ns delay from input buffer activation
CC
Region 1: I/O Buffers are OFF
V
where VT can be from 0.58 V to 0.9 V (typically 0.75 V)
Deactivation trip point:
Activation trip point:
CC
V
V
= V
d
a
= 0.9 V ± 0.3 V
= 0.8 V ± 0.3 V
Figure 2-1
CCI
+ VT
Region 1: I/O buffers are OFF
Region 2: I/O buffers are ON.
I/Os are functional (except differential inputs)
but slower because V
specification. For the same reason, input
buffers do not meet V
output buffers do not meet V
buffers do not meet V
meet V
and
same reason, input buffers do not
below specification. For the
IH
Figure 2-2 on page 2-5
A dv a n c e v 0. 3
/V
but slower because V
IL
(except differential
(except differential inputs)
levels, and output
CCI
chapter of the
IH
CCI
/V
/V
I/Os are functional
I/Os are functional
CC
CC
IL
buffers are ON.
buffers are ON.
OH
levels, and
and V
are below
levels drop below the V
Region 4: I/O
Region 4: I/O
OH
/V
Min V
standard; i.e., 1.425 V or 1.7 V
OL
/V
OL
levels.
voltage at a selected I/O
CC
levels.
CCI
or 2.3 V or 3.0 V
CCI
Voltage Levels
datasheet specification
is
ProASIC3
for more details).
Region 3: I/O buffers are ON.
I/Os are functional; I/O DC
specifications are met,
but I/Os are slower because
the V
Region 5: I/O buffers are ON
and power supplies are within
specification.
I/Os meet the entire datasheet
and timer specifications for
speed, V
CC
is below specification.
IH
CC
/V
and
IL
and V
CC
, V
OH
ProASIC3E
brownout levels (0.75 V ±
/V
OL
CCPLX
, etc.
exceed brownout
Power-Up/-Down
handbooks for
V
CCI