ST72C334N2T6 STMicroelectronics, ST72C334N2T6 Datasheet - Page 110

• Manufacturer Part Number: ST72C334N2T6
• Description: Microcontrollers (MCU) Flash 8K SPI/SCI
• Manufacturer: STMicroelectronics

Specifications of ST72C334N2T6

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 384 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 16 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-64
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: In Transition

ST72334J/N, ST72314J/N, ST72124J
SUPPLY, RESET AND CLOCK CHARACTERISTICS (Cont’d)
Notes:
1) Unless otherwise specified, typical data are based on T
lines and are not tested.
2) These data are based on typical R
quality resonator.
3) R
4) Data based on design simulation and/or technology characteristics, not tested in production.
5) Data based on characterization results, not tested in production.
6) In this condition, the capacitor to be considered is the global parasitic capacitor. In this case, the RC oscillator frequen-
cy tuning has to be done by trying out several resistor values.
110/125
CRYSTAL AND CERAMIC RESONATOR OSCILLATORS
EXTERNAL RC OSCILLATO R
INTERNAL RC OSCILLATOR
CLOCK SECURITY SYSTEM (CSS)
f
C
I
t
f
R
C
I
f
I
f
f
I
OSC
DD
START
OSC
DD
OSC
DD
SFOSC
CFL
DD
Symbol
Symbol
Symbol
Symbol
Li
EX
EX
Smax
is the equivalent serial resistance of the crystal or ceramic resonator.
Oscillator Frequency
Load
Capacitance
Supply
Current
Oscillator start-up time
External RC Oscillator Frequency
Oscillator External Resistance
Oscillator External Capacitance
Supply Current
Internal RC Oscillator Frequency
Supply Current
Safe Oscillator Frequency
Clock Filter Frequency limitation
Supply Current
Parameter
Parameter
Parameter
Parameter
Medium-high speed
Medium-high speed
Medium-low speed
Medium-low speed
2)
Smax
High speed
High speed
Low speed
Low speed
. The oscillator selection can be optimized in terms of supply current with high
Low speed resonator
Medium-low speed resonator
Medium-high speed resonator
High speed resonator
A
Depends on resonator quality. A typical value is 10ms
Conditions
=25 C and V
R
R
R
R
V
V
Condition s
Smax
Smax
Smax
Smax
Condition s
Condition s
DD
DD
V
V
V
DD
DD
=5.5V
=3.0V
DD
=200
=200
=200
=100
=5.5V
=3.0V
=5V
DD
3)
3)
3)
3)
-V
SS
=5V. They are given only as design guide-
Min
250
190
Min
3.50
3.35
Min
38
32
18
15
Min
>2
>4
>8
0
10
1
1
6)
4)
4)
4)
4)
4)
Typ
340
260
150
30
Typ
Typ
Typ
4.25
4.10
150
200
400
700
525
500
47
39
22
18
33
47
1)
1)
1)
1)
350
1100
Max
700
700
750
470
750
750
430
330
Max
Max
Max
56
46
26
21
14
47
5.00
4.85
16
2
4
8
5)
4)
4)
4)
4)
4)
4)
5)
5)
5)
4)
5)
5)
5)
MHz
MHz
MHz
MHz
Unit
Unit
Unit
Unit
kHz
k
pF
pF
A
A
A
A