MC68HC705SR3CP Freescale Semiconductor, MC68HC705SR3CP Datasheet - Page 24

• Manufacturer Part Number: MC68HC705SR3CP
• Description: IC MCU 3.75K 2.1MHZ OTP 40-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705SR3CP

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: LED, POR
• Number Of I /o: 32
• Program Memory Size: 3.75KB (3.75K x 8)
• Program Memory Type: OTP
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Connectivity: -

2
2.2.3
This configuration is intended to be the lowest cost option in applications where oscillator accuracy
is not important. An internal constant current source and a capacitor have been integrated on-chip,
connected between the OSC2 pin and VSS. Thus by either connecting a resistor to VDD from
OSC2 or by putting a wire strap between OSC1 and OSC2 self-oscillations at the frequency as
shown in Figure 2-2 and Figure 2-3 can be induced.
Freescale
2-4
Figure 2-2 Typical Oscillator Frequency for Selected External Resistor
RC Oscillator Option
Figure 2-3 Typical Oscillator Frequency for Wire-Strap Connection
2.25
2.00
1.75
1.50
1.25
1.00
4.0
3.5
3.0
2.5
2.0
1.5
2.0
30
2.5
40
3.0
50
PIN DESCRIPTIONS
3.5
60
Resistance (KΩ)
VDD (V)
4.0
70
4.5
80
5.0
90
T=25°C
T=50°C
T=0°C
5.5
100
6.0
110
MC68HC05SR3
TPG