ACE9030
ABSOLUTE MAXIMUM RATINGS
tions VDDSUB and VDDSUB2 must be the most positive of all VDD’s
at all times including during power on and off ramping. As the
current taken through these VDD’s is significantly less than
through the other VDD’s this requirement can be easily met by
directly connecting all VDD pins to a common point on the
circuit board but with the decoupling capacitors distributed to
minimise cross-talk caused by common mode currents. If low
value series resistors are to be included in the VDD connec-
tions, with decoupling capacitors by the ACE9030 pins to
further reduce interference, the VDDSUB and VDDSUB2 pins should
not have such a resistor in order to guarantee that their
voltage is not slowed down at power-on. Power switches to
DOUT0 and DOUT1 are supplied from VDDX and are specified
for a total current of up to 40 mA so any resistor in the VDDX
connection must be very low, around 1Ω, in order to avoid
excessive voltage drop; it is recommended that this supply
hasnoseriesresistor. Thesetwomethodsareshownincircuit
diagrams, figures 4 and 5. In both circuits the main VDD must
also have good decoupling.
Supply voltage from ground
(any VDD to any VSS)
Supply voltage difference
– 0·3 V to + 6·0 V
– 0·3 V to + 0·3 V
(any VDD to any other VDD)
Input voltage
VSS – 0·3 V to VDD + 0·3 V
(any input pin to its local VSS and VDD)
Output voltage
VSS – 0·3 V to VDD + 0·3 V
(any output pin to its local VSS and VDD)
Storage temperature
Operating temperature
– 55 °C to + 150 °C
– 40 °C to + 85 °C
These are not the operating conditions, but are the
absolute limits which if exceeded even momentarily may
cause permanent damage. To ensure sustained correct op-
eration the device should be used within the limits given under
Electrical Characteristics.
To avoid any possibility of latch-up the substrate connec-
Main VDD
VDDSUB
VDDSUB2
VDDL
VDDA
VDDX
VDDD
VDDSA
Fig.4 Typical VDD local decoupling networks without series resistors
Main VDD
Very
Small
No Resistor
VDDSUB
No Resistor
VDDSUB2
VDDL
VDDA
VDDX
VDDD
VDDSA
Fig.5 Typical VDD local decoupling networks with series resistors
4
MITEL [ MITEL NETWORKS CORPORATION ]
