MDS 2761A D

3

Revision 070705

MK2761A

External Components

The MK2761A requires a minimum number of external components for proper operation. Decoupling

capacitors of 0.1µF should be connected between VDD and GND, as close to the MK2761A as possible. A

series termination resistor of 33

Ω may be used for each clock output. If a clock input is not used, the 27

MHz crystal must be connected as close to the chip as possible. The crystal should be a fundamental

mode (do not use third overtone), parallel resonant, 50 ppm or better. Crystal capacitors should be

connected from pins X1 to ground and X2 to ground. The value of these capacitors is given by the following

equation, where CL is the crystal load capacitance: Crystal caps (pF) = (CL-4) x 2. So, for a crystal with 16

pF load capacitance, the crystal caps should be 24 pF each.

Absolute Maximum Ratings

Stresses above the ratings listed below can cause permanent damage to the MK2761A. These ratings,

which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of

the device at these or any other conditions above those indicated in the operational sections of the

specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can

affect product reliability. Electrical parameters are guaranteed only over the recommended operating

temperature range.

Recommended Operation Conditions

Item

Rating

Supply Voltage, VDD

7 V

All Inputs and Outputs

-0.5 V to VDD+0.5 V

Ambient Operating Temperature

0 to +70

°C

Storage Temperature

-65 to +150

°C

Junction Temperature

125

°C

Soldering Temperature

260

°C

Parameter

Min.

Typ.

Max.

Units

Ambient Operating Temperature

0

+70

°C

Power Supply Voltage (measured in respect to GND)

+4.5

+5.5

V