PIC18LF44J50-I/ML Microchip Technology, PIC18LF44J50-I/ML Datasheet - Page 374
![IC PIC MCU FLASH 16K 2V 44-QFN](/photos/6/81/68122/150-44-qfn_sml.jpg)
PIC18LF44J50-I/ML
Manufacturer Part Number
PIC18LF44J50-I/ML
Description
IC PIC MCU FLASH 16K 2V 44-QFN
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheets
1.PIC18LF24J10-ISS.pdf
(32 pages)
2.PIC18LF24J50-ISS.pdf
(554 pages)
3.PIC18LF24J50-ISS.pdf
(12 pages)
Specifications of PIC18LF44J50-I/ML
Program Memory Type
FLASH
Program Memory Size
16KB (8K x 16)
Package / Case
44-QFN
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
34
Ram Size
3.8K x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Data Converters
A/D 13x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC18LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3776 B
Interface Type
EUSART, I2C, SPI
Maximum Clock Frequency
31 KHz
Number Of Programmable I/os
22
Number Of Timers
5
Operating Supply Voltage
2 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, DM183022, DM183032, DV164136, MA180024
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 13 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
- Current page: 374 of 554
- Download datasheet (9Mb)
PIC18F46J50 FAMILY
EQUATION 21-2:
DS39931C-page 374
For this example, the following assumptions are made about the application:
• 3.3V will be applied to V
• This is a full-speed application that uses one interrupt IN endpoint that can send one packet of 64 bytes every
• A regular USB “B” or “mini-B” connector will be used on the application circuit board.
In this case, P
IN endpoint. All 64 kbps of data could potentially be bytes of value, 00h. Since ‘0’ bits cause toggling of the output state
of the transceiver, they cause the USB transceiver to consume extra current charging/discharging the cable. In this
case, 100% of the data bits sent can be of value ‘0’. This should be considered the “max” value, as normal data will
consist of a fair mix of ones and zeros.
This application uses 64 kbps for IN traffic out of the total bus bandwidth of 1.5 Mbps (12 Mbps), therefore:
Since a regular “B” or “mini-B” connector is used in this application, the end user may plug in any type of cable up to
the maximum allowed 5m length. Therefore, we use the worst-case length:
Assume I
USB bandwidth is shared between all the devices which are plugged into the root port (via hubs). If the application is
plugged into a USB 1.1 hub that has other devices plugged into it, your device may see host to device traffic on the
bus, even if it is not addressed to your device. Since any traffic, regardless of source, can increase the I
above the base 218 μA, it is safest to allow for the worst-case of 2.2 mA.
Therefore:
1 ms, with no restrictions on the values of the bytes being sent. The application may or may not have additional
traffic on OUT endpoints.
L
CABLE
† The calculated value should be considered an approximation and additional guardband or
PULLUP
application-specific product testing is recommended. The transceiver current is “in addition to” the
rest of the current consumed by the PIC18F46J50 Family device that is needed to run the core,
drive the other I/O lines, power the various modules, etc.
= 5 meters
ZERO
= 2.2 mA. The actual value of I
= 100% = 1, because there should be no restriction on the value of the data moving through the
CALCULATING USB TRANSCEIVER CURRENT
USB
I
and V
XCVR
=
DD
(40 mA • 3.3V • 1 • 0.043 • 5m)
, with the core voltage regulator enabled.
Pin =
(3.3V • 5m)
PULLUP
1.5 Mbps
64 kbps
will likely be closer to 218 μA, but allow for the worst-case.
= 4.3% = 0.043
+ 2.2 mA = 3.9 mA
†
© 2009 Microchip Technology Inc.
PULLUP
current
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