Silicon Gate MOS 8102A-4

1024 BIT FULLY DECODED STATIC MOS

RANDOM ACCESS MEMORY

•Access Time -450ns Max.

•Single +5 Volts Supply Voltage

•Directly TTL Compatible - All Inputs and Output

•Static MOS - No Clocks or Refreshing Required

•Low Power - Typically 150 mW

•Three-State Output - OR-Tie Capability

•Simple Memory Expansion - Chip Enable Input

•Fully Decoded - On Chip Address Decode

•Inputs Protected - All Inputs Have Protection Against Static Charge

•Low Cost Packaging - 16 Pin Plastic Dual-In-Line Configuration

The Intel®S102A-4 is a 1024 word by one bit static random access memory element using normally off N-channel MOS devices integrated on a monolithic array. It uses fully DC stable (static) circuitry and there- fore requires no clocks or refreshing to operate. The data is read out nondestructively and has the same polarity as the input data.

The 8102A-4 is designed for microcomputer memory applications where high performance, low cost, large bit storage, and simple interfacing are important design objectives.

It is directly TTL compatible in all respects: inputs, output, and a single +5 volt supply. A separate chip enable (CE) lead allows easy selection of an individual package when outputs are OR-tied.

The Intel 81 02A-4 is fabricated with N-channel silicon gate technology. This technology allows the design and production of high performance, easy-to-use MOS circuits and provides a higher functional density on a mon- olithic chip than either conventional MOS technology or P-channel silicon gate technology.

Intel'ssilicon gate technology also provides excellent protection against contamination. This permits the use of low cost silicone packaging.

PIN CONFIGURATION				LOGIC SYMBOL				BLOCK DIAGRAM
A6		16	A7
As	2	15	As		A o
As	2	15	As		A1
					A1
RIW	3	14	Ag		A 2	DIN
					A3			CELL
A1	4	13	CE		A 4			ARRAY
A1	4	13	CE		A 4			32 ROWS
	8102A-4				As 8102A-4			32 COLUMNS
A2	5	12	DATA OUT		As
A3	6	11	DATA IN		A 7
A3	6	11	DATA IN		As	DOUT
					As	DOUT
A4	7	10	Vee		Ag
A4	7	10	Vee
Ao	8	9	GND		R/W	CE	R/W	COLUMN 110 CIRCUITS	DATA
					R/W	CE		COLUMN 110 CIRCUITS	OUT
							DATA
							IN
		PIN NAMES
	DIN	DATA INPUT		CE	CHIP ENABLE
	Af}"Ag	ADDRESS INPUTS		DOUT	OATA OUTPUT
	R/W	READIWRITE INPUT		Vee	POWER (+5V)		0= PIN NUMBERS

5-79

8080 specifications

The Intel 8085 and 8080 microprocessors were groundbreaking innovations in the world of computing, paving the way for future microprocessor development and personal computing.

The Intel 8080, introduced in 1974, was an 8-bit microprocessor that played a fundamental role in the early days of personal computing. With a 16-bit address bus, it had the capability to address 64 KB of memory. Running at clock speeds of 2 MHz, the 8080 was notable for its instruction set, which included 78 instructions and 246 opcodes. It supported a range of addressing modes including direct, indirect, and register addressing. The 8080 was compatible with a variety of peripherals and played a crucial role in the development of many early computers.

The microprocessor's architecture was based on a simple and efficient design, making it accessible for hobbyists and engineers alike. It included an 8-bit accumulator, which allowed for data manipulation and storage during processing. Additionally, the 8080 featured registers like the program counter and stack pointer, which facilitated program flow control and data management. Its ability to handle interrupts also made it suitable for multitasking applications.

The Intel 8085, introduced in 1976, was an enhancement of the 8080 microprocessor. It maintained a similar architecture but included several key improvements. Notably, the 8085 had a built-in clock oscillator, simplifying system design by eliminating the need for external clock circuitry. It also featured a 5-bit control signal for status line management, which allowed for more flexible interfacing with peripheral devices. The 8085 was capable of running at speeds of up to 3 MHz and had an extended instruction set with 74 instructions.

One of the standout features of the 8085 was its support for 5 extra instructions for stack manipulation and I/O operations, which optimized the programming process. Additionally, it supported serial communication, making it suitable for interfacing with external devices. Its 16-bit address bus retained the 64 KB memory addressing capability of its predecessor.

Both the 8080 and 8085 microprocessors laid the groundwork for more advanced microprocessors in the years that followed. They demonstrated the potential of integrated circuits in computing and influenced the design and architecture of subsequent Intel microprocessors. Their legacy endures in the way they revolutionized computing, making technology accessible to a broader audience, and their influence is still felt in the design and architecture of modern microprocessors today.

Intel 8080 manual Silicon Gate MOS 8102A-4

Models: 8080