This standard specifies the text symbols for the pin-out functions of semiconductor integrated circuits. GB 3431.2-1986 Text symbols for semiconductor integrated circuits Pin-out function symbols GB3431.2-1986 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Semiconductor Integrated Circuit Letter Symbols
Function Symbols of Pins
Letter symbols for semiconductor integrated circuitsLetter symbols for function of plinsThis standard specifies the letter symbols for the pin functions of semiconductor integrated circuits (hereinafter referred to as devices). Composition of Pin Function Symbols
The pin function symbols of devices generally consist of two parts: basic symbols, subscript symbols and prefix symbols. 1.1 Basic Symbols
UDC 621.3.049
774: 621.3
GB 3431-2-86
The basic symbol is generally one or more letters, and the international customary letters or abbreviations can be used to indicate the function or role of the pin. For example: power supply terminal V, ground terminal GND, clear terminal CR, clock pulse terminal CP. When "-" is marked above the letter, it means that the low level (or the falling edge of the pulse) is valid. For example: clear terminal with low power, clock pulse terminal CR with falling edge.
1.2 Subscript symbol
Subscript symbol is generally one or more letters or Arabic numerals. Letters indicate the function or role of the terminal, and Arabic numerals indicate the number of terminals with the same function. For example: serial data input terminal Ds, positive trigger input terminal TR+, first bit encoder terminal IN1. 1.3 Prefix symbol
Prefix symbol is generally one Arabic numeral, indicating the same device with the same function. For example: the first trigger of the dual D flip-flop (11).
2 Commonly used digital integrated circuit terminal function symbols 2.1 Commonly used digital integrated circuit power supply terminal and ground terminal symbols Commonly used digital integrated circuit power supply terminal and ground terminal symbols are shown in Table 1. Table
Terminal name
Power supply (collector, positive power supply)
Emitter (emitter, negative power supply)
Power supply (source)
Power supply (drain)
Power supply (drain)
Positive power supply
Negative power supply
Standard power supply, standard voltage
Programming power supply
National Bureau of Standards 1986-07-01
Implementation 1987-04-01
GB3431.2-86
2.2 Commonly used symbols of digital integrated circuit input and output terminals The commonly used symbols of gate circuits, triggers, arithmetic units, registers, encoders, data selectors, decryptors, counters, and memories are shown in Tables 2 to 10. Table 2 Gate circuit input and output symbol Pin name
Data check
Three-state enable
Direction control
Extension (emitter)
Extension (collector)
A, B, C,..
Table 3 Trigger, latch input and output symbol Pin name
Data input
Set input
Immediate set input
Reset input
Direct reset input
Latch enable
Main state enable
Positive trigger input
Negative trigger input
External resistor
External resistor
Internal resistor||t t||Clock pulse
Output terminal name
Operand input
Odd parity data input
Value comparison input
Estimation input
Input generation input
Table 4 Symbols of input and output terminals of the operator
D,，K，
AB,AB
Output terminal name
Carry transfer input
Working mode control
Function Can select
odd control input
even control input
operation output
data comparison output
odd output
even output
carry output
carry generation output
escape transmission output
output name
parallel data input
serial data input
right shift serial data input
left shift serial data Input
Set to "1" input
Set to "" input
Write address input
Read address input
Three-state enable
Write enable
Read enable
Working mode control
Shift control
Set control
Clock pulse
Cascade output
Parallel/serial selection
Asynchronous/step selection
GB 3431.2-B6
Continued Table 4
Ps, Pit Pz,
So SS. .
Fu Fi, F, .
FABFA-B,FAB
Table 5 Register input and output terminal symbols
De, Di, Dz,
Q,Qo,Q!,
Terminal name
Encoded input
Two-state enable
Extended output
Strobe output
GB 3431.2—86
Table 6 Encoder input and output terminal symbols
INa, IN,.
Data selector input, output symbol 7
Pin name
Data input
Address selection input
Three-state enable
Input output
Pin nameWww.bzxZ.net
Decoding address input
Lamp test input
Blanking input
Serial blanking input
Display frequency input
Decoding output
Character display code output
Serial blanking output
Display frequency input
Table 8 Decoder input, output symbol
Yo+ Yi. .....
Ys, Table 9 Symbols of input and output terminals of counter Terminal name Data input Set control Output terminal name Reset “g” Set “g” Count control Count/count down Select Clock pulse Add clock pulse Subtract clock pulse Carry output Borrow output GB 841.2—86 Continued Table 9 CT, CTP, CTT
Memory input and output symbols
Pin-out name
Data input
Address input
Column address select
Row address select
Chip enable
Read and write select
Data output
3 Commonly used analog circuit pin-out function symbols Commonly used analog integrated circuit power supply and ground terminal symbols 3.1
Commonly used analog integrated circuit power supply and ground terminal symbols are shown in Table 11. Table 11
Pin-out name
Power supply (positive electrode)
Power supply (source)
Power supply (drain)
Positive power supply
Negative power supply
Base voltage
Amplifier ground
Digital ground
Analog ground
3.2 Symbols of commonly used analog integrated circuit input and output terminals The symbols of commonly used operational amplifiers and integrated regulator input and output terminals are shown in Tables 12 to 13. Table 12 Input and output terminals of operational amplifier Symbol Terminal name
In-phase input
Inverting input
Offset adjustment
Output terminal name
Voltage input
In-phase input
Inverting input
Voltage adjustment
Balance adjustment
External voltage
External resistance
Extension current
DC shift sampling
Cut-off time adjustment
Symmetric correction
Shutdown control
Voltage output
Zener diode output
Oscillator output
Integrated regulator input and output terminal symbol Symbol
GB a431.286
Additional Notes:
This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard was drafted by the Text Symbol Working Group of the Basic Branch of the National Technical Committee for Standardization of Integrated Circuits.
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