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Giant Internet IC* Masturbator [1.7]

General

The Giant Internet IC* Masturbator was created by Frank A. Vorstenbosch <falstaff@falstaff.demon.co.uk> after such a thing was discussed on sci.electronics. The name is due to Steve Walz <rstevew@armory.com> and any suggestions on changing it will be forwarded to /dev/null before you can say 'bigot'.

Timing information for ICs is not available, and only TTL, 4000-series CMOS*, some microprocessor (support) and a few analog chips are included.

The current file uses the PC8 character set (a.k.a. codepage 437), but can be converted to 7-bit ASCII without too much trouble (losing some niceties). As it is, it is small and simple enough to keep it in your notebook PC for when you are out in the field, it even fits in a HP100LX palmtop PC.

To minimize the amount of information needed per IC*, a structured format is used in the descriptions, and only features that differ from the assumptions below are indicated. Truth tables are not yet available for all ICs, simply because creating them takes a long time. The layout of the file is dictated by the fortune-cookie program I use to sort this file (alphabetically -- not by number).

Anyone wanting to add this information should feel free to do so, but please to not post changed versions. Instead, mail additions to $mail_falstaff.

Frank

Pin identification

General:

Missing pins have no pin number.
Unconnected pins and test pins that should be left floating have noidentification.
Clock signals are identified by CLK for positive-edge triggering or /CLKfor negative-edge triggering.
Reset (clear) inputs are identified by RST.
Set inputs are identified by SET.
For 3-state devices, output enables are indicated by OE.
When a pin has two modes, or selects between two operations, then thetwo may be separated by a slash. An inversion slash may still be presentas in SH//LD for shift or load select.
Pins that have more than one function (selected by programming or the stateof another pin) are indicated by both functions separated by a space.

Power supply:

The main power supply is indicated by VCC.
System ground is indicated by GND*.
A secondary positive power supply may be indicated by VDD.
A negative power supply is indicated by VEE.
Programming power supply (usually higher than VCC) is indicated by VPP.

Gates, line drivers etc.:

Inputs are identified by letters starting from A.
Outputs are indicated by Y.

Flip-flops:

Inputs are identified by J and K, or D.
Outputs are indicated by Q.

Counters:

Load inputs are indicated by P followed by the counter stage number.
Outputs are indicated by Q followed by the counter stage number.Thus (assuming a binary counter) Q0 is the /2 output, Q1 the /4 output.

Shift registers:

Parallel inputs or bidirectional parallel I/O pins are identified by Pfollowed by the shifter stage number. The rightmost stage in a shiftregister is number 0.
Serial inputs are identified by letters starting from D (for right shift)or from L (for left shift). If more than one of either is available,the letter is followed by the shifter stage number it feeds.
Serial outputs are identified by Q, which may be followed by the shifterstage number if more than one serial output exists.
Parallel outputs are identified by Q (only if no serial outputs exist),Y (3-state outputs or output latch) or R (otherwise) followed by theshifter stage number.
Unidirectional shift registers shift to the right (towards stage 0).Note: In the next version, pin numbering on shift registers is likelyto be changed, so that the normal shift direction is towards higherstage numbers.

Multiplexers:

Inputs are identified by A followed by a number.
Outputs are indicated by Y.
Select inputs are identified by S followed by a number starting at 0,unless there is only one select input in which case only S is specified.When the S inputs are taken as a binary number, the value indicateswhich input is selected.

Demultiplexers:

Inputs are indicated by A, preceded by a section number if more than one.
Outputs are identified by Y followed by a number. When there is more thanone multiplexer section, inputs are prefixed by a number indicating towhich section they belong.
Select inputs are identified by S followed by a number starting at 0,unless there is only one select input in which only S is specified.When the S inputs are taken as a binary number, the value indicateswhich output is selected. For noninverting demultiplexers unselectedoutputs are 0, for inverting demultiplexers they are 1.

Analog multiplexers/demultiplexers:

Analog switches generally are bidirectional, and inputs and outputs cantherefore be reversed.One side of the switch is indicated by X (optionally followed by a number),the other side is indicated by Y.
Select inputs are identified by S followed by a number starting at 0,unless there is only one select input in which only S is specified.When the S inputs are taken as a binary number, the value indicateswhich switch is selected.

Memories:

Address inputs are indicated by A followed by the bit number, startingfrom 0. Multiport memories use RA or WA for separate read and writeaddresses, or A prefixed by the port number followed by the bit number.
Data inputs or data I/O are indicated by D followed by a number startingfrom 0.
Data outputs are indicated by Q followed by a number.

Oscillators:

One-inverter oscillators are indicated by X0 and X1 pins, where X0 isthe inverters' output and X1 is the input. If I happen not to know whichis which, the pins are indicated by X1 and X2. A crystal oscillatorusually requires a crystal parallel to a 10M resistor, with two smallcapacitors to ground; but sometimes only a crystal is needed -- mostoften when a 32kHz watch crystal can be used.
Two-inverter oscillators are indicated by X1 (input), X0 (middle node)and X2 (output). A crystal oscillator can then be made using X0 and X1.

Sections:

When a device has several (largely) independent sections, I/O pinsare prefixed by the section number, starting from 1, as in 1J or /1Q.
Multi-bit functions, such as counters or 3-state buffers have I/O pinssuffixed by the bit number, usually starting from 0 (except sometimesfor counters which may have some outputs missing).
The section/bit numbering is used in a different way for (de)multiplexers.

Truth Tables

For inputs, the following notations are used:
0	logic low level
1	logic high level
X	don't care, either 0 or 1
/	rising or positive-edge clock input
\	falling or negative-edge clock input
!!/	not a rising edge, either 0, 1 or \
!!\	not a falling edge, either 0, 1 or /
.	'continued', used in compressing the table

For outputs, the following notations are used:
0	logic low level
1	logic high level
Z	high impedance, either 3-state or open-collector not driving output
-	no change (latched in closed state, or register value not changed)
?	undefined (although some manufacturers may define a behaviour)
.	'continued', used in compressing the table

Assumptions for TTL devices

Single/Dual* Flip-flops:

The clock is positive-edge triggered.
Complementary outputs are available.

Multiple flip-flops:

Only inverting or noninverting outputs are available.

Synchronous counters:

The clock is positive-edge triggered.
LOAD,SET and RESET are synchronous.

Asynchronous counters:

The clock is negative-edge triggered.
LOAD,SET and RESET are asynchronous.