PIC16F506-I/ST Microchip Technology, PIC16F506-I/ST Datasheet - Page 107

• Manufacturer Part Number: PIC16F506-I/ST
• Description: IC PIC MCU FLASH 1KX14 14TSSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F506-I/ST

• Program Memory Type: FLASH
• Program Memory Size: 1.5KB (1K x 12)
• Package / Case: 14-TSSOP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 11
• Ram Size: 67 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 67 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 3-ch x 8-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

11.0
The PIC16HV616 includes a permanent internal 5 volt
(nominal) shunt regulator in parallel with the V
This eliminates the need for an external voltage
regulator in systems sourced by an unregulated supply.
All external devices connected directly to the V
will share the regulated supply voltage and contribute
to the total V
11.1
A shunt regulator generates a specific supply voltage
by creating a voltage drop across a pass resistor R
The voltage at the V
monitored and compared to an internal voltage refer-
ence. The current through the resistor is then adjusted,
based on the result of the comparison, to produce a
voltage drop equal to the difference between the supply
voltage V
See Figure 11-1 for voltage regulator schematic.
FIGURE 11-1:
© 2007 Microchip Technology Inc.
C
I
SUPPLY
BYPASS
VOLTAGE REGULATOR
Regulator Operation
UNREG
V
UNREG
DD
R
SER
supply current (I
I
SHUNT
and the V
DD
VOLTAGE REGULATOR
pin of the microcontroller is
DD
of the microcontroller.
LOAD
Feedback
).
I
LOAD
PIC16F610/616/16HV610/616
DD
DD
V
V
DD
SS
SER
pin.
Preliminary
pin
.
An external current limiting resistor, R
between the unregulated supply, V
pin, drops the difference in voltage between V
and V
defined by Equation 11-1.
EQUATION 11-1:
11.2
The supply voltage V
constant. Therefore, the current range of the regulator
is limited. Selecting a value for R
three factors into consideration.
Since the regulator uses the band gap voltage as the
regulated voltage reference, this voltage reference is
permanently enabled in the PIC16F610/16HV610
devices.
Where:
R
R
VU
VU
V
I
1.05
0.95
LOAD
DD
MAX
MIN
MIN
MAX
DD
. R
Regulator Considerations
= maximum value of R
= minimum value of R
= minimum value of V
= maximum value of V
= regulated voltage (5V nominal)
= maximum expected load current in mA
= compensation for +5% tolerance of R
= compensation for -5% tolerance of R
R
R
SER
including I/O pin currents and external
circuits connected to V
MAX
MIN
must be between R
=
=
1.05 • (4
UNREG
0.95 • (50
R
(VU
(VU
SER
MAX
MIN
M
and load current are not
LIMITING RESISTOR
A + I
- 5V)
- 5V)
UNREG
M
SER
UNREG
SER
A)
SER
UNREG
LOAD
DD
DS41288C-page 105
(ohms)
MAX
(ohms)
.
must take these
)
, and the V
SER
and R
, located
UNREG
MIN
SER
SER
DD
as