SPICE/NOT TTL

created in LTspice/Switcher CAD III(could be template/tag)

Description

bad fuse image This schematic would need some work before it can be simulated in SPICE and is untested on Breadboard.

The internal schematic of a standard TTL NOT gate

Dependances

• SPICE/VCC 5V

Code Listing

NAND.TTL.asc

Version 4
SHEET 1 880 680
WIRE 272 32 272 16
WIRE 272 32 112 32
WIRE 384 32 272 32
WIRE 112 48 112 32
WIRE 272 48 272 32
WIRE 384 48 384 32
WIRE 384 144 384 128
WIRE 272 192 272 128
WIRE 320 192 272 192
WIRE 112 240 112 128
WIRE 272 256 272 192
WIRE 384 272 384 240
WIRE 208 304 160 304
WIRE 64 336 64 304
WIRE 64 336 -48 336
WIRE 384 352 384 336
WIRE 496 352 384 352
WIRE 384 368 384 352
WIRE 272 416 272 352
WIRE 320 416 272 416
WIRE 64 464 64 336
WIRE 272 464 272 416
WIRE 64 560 64 528
WIRE 272 560 272 544
WIRE 272 560 64 560
WIRE 384 560 384 464
WIRE 384 560 272 560
WIRE 272 576 272 560
FLAG 272 576 0
FLAG -48 336 A
FLAG 496 352 X
SYMBOL 5v 272 16 R0
SYMATTR InstName X1
SYMBOL npn 320 368 R0
WINDOW 0 30 34 Left 0
WINDOW 3 32 62 Left 0
SYMATTR InstName Q2
SYMBOL npn 320 144 R0
WINDOW 0 35 37 Left 0
WINDOW 3 33 61 Left 0
SYMATTR InstName Q3
SYMBOL npn 208 256 R0
WINDOW 0 41 32 Left 0
WINDOW 3 37 58 Left 0
SYMATTR InstName Q4
SYMBOL diode 80 528 R180
WINDOW 0 -30 19 Left 0
WINDOW 3 24 -2 Left 0
SYMATTR InstName D1
SYMATTR Value ""
SYMBOL res 256 448 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL diode 368 272 R0
WINDOW 3 34 54 Left 0
SYMATTR InstName Dout
SYMATTR Value ""
SYMBOL res 368 32 R0
SYMATTR Value 125
SYMBOL res 288 32 M0
SYMATTR Value 1.6k
SYMBOL res 128 32 M0
SYMATTR Value 4k
SYMBOL npn 160 240 R90
SYMATTR InstName Q1

Description	A standard NPN transistor with 2 emitters
Source	Own Work
Date	9/29/2007
Author	user:eadthem
Permission (Reusing this file)	Own Work

I, the copyright holder of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.