Circuit Negma

C++, C, VB.NET, PCB, Electronics, Circuit Design

Archive for June, 2008

Pin Configuration :: PIC 40-pin Families

Posted by Circuit Negma on June 23, 2008


Created By: Hussein Nosair

Pin Configurations of the Microchip 40-pin families

1 Instruction Cycle = 4 pulses

1 Instruction Cycle = 4 clocks

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PIN Configuration: PIC16F877 (40pins) Vs. PIC18F4520 (40pins)

Posted by Circuit Negma on June 18, 2008


Created By: Hussein Nosair

PIC16F877 PIC18F4520
PIN NUM. PIN NAME PIN NAME
1 MCLR/VPP MCLR/VPP/RE3
2 RA0/AN0 RA0/AN0
3 RA1/AN1 RA1/AN1
4 RA2/AN2/VREF-/CVREF RA2/AN2/VREF-/CVREF
5 RA3/AN3/VREF+ RA3/AN3/VREF+
6 RA4/T0CKI/C1OUT RA4/T0CKI/C1OUT
7 RA5/AN4/SS/C2OUT RA5/AN4/SS/HLVDIN/C2OUT
8 RE0/RD/AN5 RE0/RD/AN5
9 RE1/WR/AN6 RE1/WR/AN6
10 RE2/CS/AN7 RE2/CS/AN7
11 VDD VDD
12 VSS VSS
13 OSC1/CLKI OSC1/CLKI/RA7
14 OSC2/CLKO OSC2/CLKO/RA6
15 RC0/T1OSO/T1CKI RC0/T1OSO/T13CKI
16 RC1/T1OSI/CCP2 RC1/T1OSI/CCP2
17 RC2/CCP1 RC2/CCP1/P1A
18 RC3/SCK/SCL RC3/SCK/SCL
19 RD0/PSP0 RD0/PSP0
20 RD1/PSP1 RD1/PSP1
21 RD2/PSP2 RD2/PSP2
22 RD3/PSP3 RD3/PSP3
23 RC4/SDI/SDA RC4/SDI/SDA
24 RC5/SDO RC5/SDO
25 RC6/TX/CK RC6/TX/CK
26 RC7/RX/DT RC7/RX/DT
27 RD4/PSP4 RD4/PSP4
28 RD5/PSP5 RD5/PSP5/P1B
29 RD6/PSP6 RD6/PSP6/P1C
30 RD7/PSP7 RD7/PSP7/P1D
31 VSS VSS
32 VDD VDD
33 RB0/INT RB0/INT0/FLT0/AN12
34 RB1 RB1/INT1/AN10
35 RB2 RB2/INT2/AN8
36 RB3/PGM RB3/AN9/CCP2
37 RB4 RB4/KBI0/AN11
38 RB5 RB5/KBI1/PGM
39 RB6/PGC RB6/KBI2/PGC
40 RB7/PGD RB7/KBI3/PGD

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Glossary 2 :: SIDACTOR

Posted by Circuit Negma on June 12, 2008


Created By: Hussein Nosair

VDRM (Peak Off-state Voltage) : Maximum voltage that can be applied while maintaining OFF state.

IDRM (Leakage Current) : Maximum peak OFF-state current measured at VDRM (Peak OFF-state Voltage).

VS (Switching Voltage) : Maximum voltage prior to switching to ON state.

IS MAX (Switching Current) : Maximum current required to switch to ON state.

VT MAX (ON state Voltage) : Maximum voltage measured at rated ON state current.

IH MIN (Holding Current) : Minimum current required to maintain ON state.

CO MIN (Minimum OFF-state Capacitance) : Minimum capacitance measured in OFF state.

CO MAX (Maximum OFF-state Capacitance) : Maximum capacitance measured in OFF state.

IPP (Peak Pulse Current) : Maximum rated peak impulse current.

ITSM (Peak One-cycle Surge Current) : Maximum rated one-cycle AC current.

di/dt MAX (Rate of Rise of Current) : Maximum rated value of the acceptable rate of rise in current over time.

Switch to ON STATE :

V <= VS @ I <= IS MAX

Maintain ON STATE :

Von <= VT MAX @ Ion >= IH MIN

OFF STATE :

V <= VDRM @ I <= IDRM

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Glossary 1

Posted by Circuit Negma on June 12, 2008


Created By: Hussein Nosair

VDRM = maximum repetitive peak-off state voltage
VRRM = maximum repetitive peak reverse voltage
ITGQM = maximum repetitive controlable on-state current
Cs = snubber capacity
IT(RMS) = RMS on-state current
ITAVm = maximum average on-state current (50 Hz half sine wave)
ITSM = maximum surge on-state current, nonrepetitive (50 Hz half sine wave)
(diT/dt)cr = critical rate of rise of on-state current
(dvD/dt)cr = critical rate of rise of off-state voltage
I2t = maximum rated value I2t
VTM = peak on-state voltage
VTO = threshold voltage
rT = slope resistance (on-state)
IGT = gate trigger current
VGT = gate trigger voltage
tGQ = turn-off time
TjM = maximum junction temperature
Tj = junction temperature = TjM unless otherwise indicated
Tc = case temperature
m = mass
Fp = pressure force

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