PIC16C58B-20I/SO Microchip Technology, PIC16C58B-20I/SO Datasheet - Page 23

• Manufacturer Part Number: PIC16C58B-20I/SO
• Description: IC MCU OTP 2KX12 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C58B-20I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 12
• Program Memory Size: 3KB (2K x 12)
• Program Memory Type: OTP
• Ram Size: 73 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 18-SOIC (7.5mm Width)
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 73 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 8
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000
• Minimum Operating Temperature: - 40 C
• For Use With: XLT18SO-1 - SOCKET TRANSITION 18SOIC 300MIL309-1075 - ADAPTER 18-SOIC TO 18-SOIC309-1011 - ADAPTER 18-SOIC TO 18-DIP309-1010 - ADAPTER 18-SOIC TO 18-DIPAC164002 - MODULE SKT PROMATEII 18/28SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

5.1
The PIC16C5X family incorporates on-chip Power-On
Reset (POR) circuitry which provides an internal chip
RESET for most power-up situations. To use this fea-
ture, the user merely ties the MCLR/V
simplified block diagram of the on-chip Power-On
Reset circuit is shown in Figure 5-1.
The Power-On Reset circuit and the Device Reset
Timer (Section 5.2) circuit are closely related. On
power-up, the RESET latch is set and the DRT is
RESET. The DRT timer begins counting once it detects
MCLR to be high. After the time-out period, which is
typically 18 ms, it will RESET the reset latch and thus
end the on-chip RESET signal.
A power-up example where MCLR is not tied to V
shown in Figure 5-3. V
before bringing MCLR high. The chip will actually come
out of reset T
In Figure 5-4, the on-chip Power-On Reset feature is
being used (MCLR and V
is stable before the start-up timer times out and there is
no problem in getting a proper RESET. However,
Figure 5-5 depicts a problem situation where V
too slowly. The time between when the DRT senses a
high on the MCLR/V
pin (and V
In this situation, when the start-up timer times out, V
has not reached the V
therefore, not guaranteed to function correctly. For
such situations, we recommend that external RC cir-
cuits be used to achieve longer POR delay times
(Figure 5-2).
For more information on PIC16C5X POR, see Power-
Up Considerations - AN522 in the Embedded Control
Handbook.
The POR circuit does not produce an internal RESET
when V
Note:
2002 Microchip Technology Inc.
DD
Power-On Reset (POR)
DD
declines.
When the device starts normal operation
(exits the RESET condition), device oper-
ating parameters (voltage, frequency, tem-
perature, etc.) must be met to ensure
operation. If these conditions are not met,
the device must be held in RESET until the
operating conditions are met.
) actually reach their full value, is too long.
DRT
msec after MCLR goes high.
PP
DD
DD
pin, and when the MCLR/V
DD
is allowed to rise and stabilize
(min) value and the chip is,
are tied together). The V
PP
pin to V
DD
DD
DD
rises
Preliminary
. A
DD
DD
PP
is
FIGURE 5-2:
• External Power-On Reset circuit is required
• R < 40 k is recommended to make sure that
• R1 = 100
only if V
helps discharge the capacitor quickly when
V
voltage drop across R does not violate the
device electrical specification.
ing into MCLR from external capacitor C in the
event of MCLR pin breakdown due to Electro-
static Discharge (ESD) or Electrical Over-
stress (EOS).
DD
V
DD
powers down.
D
DD
V
power-up is too slow. The diode D
to 1 k will limit any current flow-
DD
R
EXTERNAL POWER-ON
RESET CIRCUIT (FOR
SLOW VDD POWER-UP)
C
R1
PIC16C5X
MCLR
DS30453D-page 21
PIC16C5X