MC9RS08KB4CFK Freescale Semiconductor, MC9RS08KB4CFK Datasheet - Page 8

• Manufacturer Part Number: MC9RS08KB4CFK
• Description: 8-bit Microcontrollers - MCU 8BIT 4K FLASH
• Manufacturer: Freescale Semiconductor

Specifications of MC9RS08KB4CFK

• Rohs: yes
• Core: RS08
• Processor Series: MC9RS08KB12
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 4 KB
• Data Ram Size: 126 B
• On-chip Adc: Yes
• Operating Supply Voltage: 1.8 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: QFN-24
• Mounting Style: SMD/SMT

Electrical Characteristics
unusually high pin current (heavy loads), the difference between pin voltage and V
small.
The average chip-junction temperature (TJ) in °C can be obtained from:
where:
T
θ
P
P
P
For most applications, P
(if P
Solving
where K is a constant pertaining to the particular part. K can be determined from
P
solving
3.5
Although damage from electrostatic discharge (ESD) is much less common on these devices than on early
CMOS circuits, normal handling precautions must be used to avoid exposure to static discharge.
Qualification tests are performed to ensure that these devices can withstand exposure to reasonable levels
of static without suffering any permanent damage.
8
JA
A
D
int
I/O
D
= Ambient temperature, °C
= P
(at equilibrium) for a known T
= Package thermal resistance, junction-to-ambient, °C /W
= I
I/O
= Power dissipation on input and output pins user determined
int
DD
is neglected) is:
Equation 1
Equation 1
Operating temperature range (packaged)
Maximum junction temperature
Thermal resistance 24-pin QFN
Thermal resistance 20-pin SOIC
Thermal resistance 16-pin SOIC NB
Thermal resistance 16-pin TSSOP
Thermal resistance 8-pin SOIC
Thermal resistance 8-pin DFN
+ P
ESD Protection and Latch-Up Immunity
× V
I/O
DD
, Watts chip internal power
and
and
Equation 2
I/O
Equation 2
Rating
<< P
MC9RS08KB12 Series MCU Data Sheet, Rev. 5
int
K = P
A
and can be neglected. An approximate relationship between PD and TJ
iteratively for any value of T
. Using this value of K, the values of P
for K gives:
Table 4. Thermal Characteristics
D
P
× (T
T
D
J
= K ÷ (T
= T
A
+ 273°C) + θ
A
+ (P
J
+ 273°C)
D
× θ
Symbol
T
JMAX
θ
θ
θ
θ
θ
θ
T
JA
JA
JA
JA
JA
JA
JA
A
JA
)
× (PD)
A
2
.
–40 to 85
T
Value
L
150
113
103
150
110
83
29
to T
D
and T
H
Equation 3
J
SS
can be obtained by
Freescale Semiconductor
or V
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
DD
Unit
°C
°C
by measuring
will be very
Eqn. 1
Eqn. 2
Eqn. 3