PIC16C74B-20I/L Microchip Technology Inc., PIC16C74B-20I/L Datasheet - Page 87

• Manufacturer Part Number: PIC16C74B-20I/L
• Description: 44 PIN, 7 KB OTP, 192 RAM, 33 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16C74B-20I/L

• A/d Inputs: 8-Channel, 8-Bit
• Cpu Speed: 5 MIPS
• Eeprom Memory: 0 Bytes
• Input Output: 33
• Interface: I2C/SPI/USART
• Memory Type: OTP
• Number Of Bits: 8
• Package Type: 44-pin PLCC
• Programmable Memory: 7K Bytes
• Ram Size: 192 Bytes
• Speed: 4 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2.5-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

TABLE 13-1:
TABLE 13-2:
Ranges Tested:
Note:
Resonators Used:
Note:
Note:
Crystals Used:
16.0 MHz
Osc Type
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
2000 Microchip Technology Inc.
200 kHz
20 MHz
Mode
32 kHz
1 MHz
4 MHz
8 MHz
HS
XT
XT
HS
LP
These values are for design guidance only.
See notes following Table 13-1 and Table 13-2.
Resonators used did not have built-in capacitors.
These values are for design guidance only.
See notes following Table 13-1 and Table 13-2.
Panasonic EFO-A455K04B
Murata Erie CSA2.00MG
Murata Erie CSA4.00MG
Murata Erie CSA8.00MT
Murata Erie CSA16.00MX
Epson C-001R32.768K-A
STD XTL 200.000KHz
ECS ECS-10-13-1
ECS ECS-40-20-1
EPSON CA-301 8.000M-C
EPSON CA-301 20.000M-C
16.0 MHz
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
200 kHz
200 kHz
Crystal
20 MHz
32 kHz
1 MHz
4 MHz
4 MHz
8 MHz
Freq
Freq
CERAMIC RESONATORS
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
Cap. Range
68 - 100 pF
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
47-68 pF
15-33 pF
15-33 pF
33 pF
15 pF
15 pF
15 pF
15 pF
OSC1
C1
Cap. Range
68 - 100 pF
± 20 PPM
± 20 PPM
± 50 PPM
± 50 PPM
± 30 PPM
± 30 PPM
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
47-68 pF
15-33 pF
15-33 pF
± 0.3%
± 0.5%
± 0.5%
± 0.5%
± 0.5%
33 pF
15 pF
15 pF
15 pF
15 pF
OSC2
C2
PIC16C63A/65B/73B/74B
13.2.3
For timing insensitive applications, the “RC” device
option offers additional cost savings. The RC oscillator
frequency is a function of the supply voltage, the resis-
tor (R
ing temperature. The oscillator frequency will vary from
unit to unit due to normal process variation. The differ-
ence in lead frame capacitance between package
types will also affect the oscillation frequency, espe-
cially for low C
into account variation due to tolerance of external R
and C components used. Figure 13-3 shows how the
R/C combination is connected to the PIC16CXX.
The oscillator frequency, divided by 4, is available on
the OSC2/CLKOUT pin, and can be used for test pur-
poses or to synchronize other logic (see Figure 3-2 for
waveform).
FIGURE 13-3:
C
Recommended Values: R
R
Note 1: Higher capacitance increases the stability
V
EXT
EXT
SS
EXT
V
DD
) and capacitor (C
2: Since each resonator/crystal has its own
3: Rs may be required in HS mode, as well
4: Oscillator performance should be verified
RC OSCILLATOR
of the oscillator, but also increases the
start-up time.
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate values of external compo-
nents.
as XT mode, to avoid overdriving crystals
with low drive level specification.
at the expected voltage and temperature
extremes in which the application is
expected to operate.
EXT
F
OSC
values. The user also needs to take
/4
RC OSCILLATOR MODE
C
OSC1
OSC2/CLKOUT
EXT
EXT
EXT
= 3 kW to 100 kW
= 20 pf to 30 pF
) values, and the operat-
DS30605C-page 87
PIC16CXX
Internal
Clock