PIC16F639-I/SS Microchip Technology, PIC16F639-I/SS Datasheet - Page 112
PIC16F639-I/SS
Manufacturer Part Number
PIC16F639-I/SS
Description
IC MCU FLASH 2KX14 20SSOP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC12F635-ISN.pdf
(234 pages)
3.PIC16F636-ISL.pdf
(8 pages)
4.PIC16F636-ISL.pdf
(4 pages)
5.PIC16F639-ISS.pdf
(6 pages)
6.PIC16F676-EP.pdf
(132 pages)
Specifications of PIC16F639-I/SS
Program Memory Type
FLASH
Program Memory Size
3.5KB (2K x 14)
Package / Case
20-SSOP
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, LVD, POR, WDT
Number Of I /o
11
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
12
Number Of Timers
2
Operating Supply Voltage
2 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
PG164130, DV164035, DV244005, DV164005, PG164120
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT20SS1-1 - SOCKET TRANSITION 20DIP 20SSOPXLT20SS-1 - SOCKET TRANSITION 18DIP 20SSOPAC162066 - HEADER INTRFC MPLAB ICD2 20PINAC164307 - MODULE SKT FOR PM3 28SSOP
Eeprom Size
-
Data Converters
-
Connectivity
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC12F635-ISN PDF datasheet #2
- PIC16F636-ISL PDF datasheet #3
- PIC16F636-ISL PDF datasheet #4
- PIC16F639-ISS PDF datasheet #5
- PIC16F676-EP PDF datasheet #6
- Current page: 112 of 234
- Download datasheet (4Mb)
PIC12F635/PIC16F636/639
11.26 Factory Calibration
Microchip
device-to-device variation in standby current, internal
timing and sensitivity, as well as channel-to-channel
sensitivity variation.
11.27 De-Q’ing of Antenna Circuit
When the transponder is close to the base station, the
transponder coil may develop coil voltage higher than
V
detects the strong near field signal through the AGC
control, and de-Q’ing the antenna circuit to reduce the
input signal amplitude.
FIGURE 11-8:
DS41232D-page 110
DE
V
_
Legend:
BAT
Q
. This condition is called “near field”. The AFE
calibrates
D
D
C
BLOCK
BLOCK
D
C
R
POOL
D
R
FLAT
COM
COM
LIM
LIM
LF FIELD POWERING AND BATTERY BACK-UP EXAMPLE
= LCCOM charging capacitor.
= Pool capacitor (or battery back-up capacitor), charges in field and powers device.
= Battery protection from reverse charge.
= Field rectifier diodes.
= Voltage limiting diode, may be required to limit V
= C
= Current limiting resistor, required for air coil in strong fields.
the
Schottky for low forward bias drop.
D
COM
LIM
AFE
discharge path.
V
DD
to
C
POOL
reduce
D
D
the
FLAT
FLAT
1
2
Air Coil
L
X
11.28 Battery Back-up and Batteryless
The device supports both battery back-up and
batteryless operation by the addition of external
components, allowing the device to be partially or
completely powered from the field.
Figure 11-8 shows an example of the external circuit for
the battery back-up.
Note:
R
L
C
Y
COM
X
R
LIM
Operation
DD
Voltage on L
voltage must not exceed the maximum LC
input voltage.
C
C
voltage when in strong fields.
COM
Y
L
Z
© 2007 Microchip Technology Inc.
CCOM
C
Z
LCCOM
combined with coil input
LCX
LCY
LCZ
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