MC68C812A4 Datasheet, PDF (2/18 Pages) Freescale Semiconductor, Inc – Technical Supplement MC68C812A4 3.3V Electrical Characteristics

Freescale Semiconductor, Inc.
Table 1 Maximum Ratings¹
Rating
Symbol
Value
Unit
Supply voltage
Input voltage
Operating temperature range²
MC68C812A4PV5
V_DD, V_DDA,
V_DDX
−0.3 to +6.5
V
V_IN
−0.3 to +6.5
V
T_A
T_L to T_H
0 to +70
°C
Storage temperature range
Current drain per pin³
Excluding V_DD and V_SS
T_stg
−55 to +150 °C
I_IN
±25
mA
V_DD differential voltage
V_DD−V_DDX
6.5
V
NOTES:
1. Permanent damage can occur if maximum ratings are exceeded. Exposures to voltages or cur-
rents in excess of recommended values affects device reliability. Device modules may not operate
normally while being exposed to electrical extremes.
2. Refer to MC68HC812A4TS/D Technical Summary for complete part numbers.
3. One pin at a time, observing maximum power dissipation limits. Internal circuitry protects the in-
puts against damage caused by high static voltages or electric fields; however, normal precautions
are necessary to avoid application of any voltage higher than maximum-rated voltages to this high-
impedance circuit. Extended operation at the maximum ratings can adversely affect device reli-
ability. Tying unused inputs to an appropriate logic voltage level (either GND or V_DD) enhances
reliability of operation.
Table 2 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Average junction temperature
Ambient temperature
Package thermal resistance (junction-to-ambient)
112-pin thin quad flat pack (TQFP)
T_J
T_A + (P_D × Θ_JA)
°C
T_A
User-determined
°C
Θ_JA
39
°C/W
Total power dissipation¹
P_INT + P_I/O
or
P_D
W
-_T---_J---₊-----^K₂---₇---₃---_°--_C--
Device internal power dissipation
I/O pin power dissipation²
P_INT
I_DD × V_DD
W
P_I/O
User-determined
W
A constant³
K
P_D × (T_A + 273°C) +
Θ_JA × P_D2
W · °C
NOTES:
1. This is an approximate value, neglecting P_I/O.
2. For most applications P_I/O « P_INT and can be neglected.
3. K is a constant pertaining to the device. Solve for K with a known T_A and a measured P_D (at equilibrium). Use
this value of K to solve for P_D and T_J iteratively for any value of T_A.
2
For More Information On This Product,
Go to: www.freescale.com