SILICON GATE CMOS 5101,5101-3, 5101L, 5101L-3

A.C. Characteristics for 5101, 5101·3, 5101 L, 5101 L- 3

READ CYCLE TA = o°c to 70°C, Vcc = 5V ±5%, unless otherwise specified.

Symbol

Parameter

Min.

Typ.

Max.

Unit

Test Conditions

tAC

Read Cycle

650

 

 

ns

 

tA

Access Time

 

 

650

ns

 

teol

Chip Enable (CE1) to Output

 

 

600

ns

(See below)

teo2

Chip Enable (CE2) to Output

 

 

700

ns

 

 

 

too

Output Disable To Output

 

 

350

ns

 

tOF

Data Output to High Z State

0

 

150

ns

 

tOH1'

Previous Read Data Valid with

0

 

 

ns

 

Respect to Address Change

 

 

 

 

 

 

 

 

 

tOH2

Previous Read Data Valid with

0

 

 

ns

 

Respect to Chip Enable

 

 

 

 

 

 

 

 

 

WRITE CYCLE

 

 

 

 

 

Symbol

Parameter

Min.

Typ.

Max.

Unit

Test Conditions

twe

Write Cycle

650

 

 

ns

 

tAW

Write Delay

150

 

 

ns

 

tewl

Chip Enable (CE1) To Write

550

 

 

ns

(See below)

tCW2

Chip Enable (CE2) To Write

550

 

 

ns

 

 

 

tow

Data Setup

400

 

 

ns

 

tOH

Data Hold

100

 

 

ns

 

twP

Write Pulse

400

 

 

ns

 

tWA

Write Recovery

50

 

 

ns

 

tos

Output Disable Setup

150

 

 

ns

 

A. C. CONDITIONS OF TEST

 

Capaci-18nee[2]TA= 25°C, f = 1 MHz

 

 

Input Pulse Levels:

+0.65 Volt to 2.2 Volt

 

 

Limits (pF)

Input Pulse Rise and Fall Times:

20nsec

Symbol

Test

Typ.

Max.

 

 

 

 

 

Timing Measurement Reference Level:

1.5 Volt

C1N

Input Capacitance

4

8

Output Load:

1 TTL Gate and CL = 100pF

 

(All Input Pins) V1N = OV

 

 

 

 

 

 

GoUT

Output Capacitance VO UT = OV

8

12

5-93

Page 159
Image 159
Intel 8080 manual Input Pulse Rise and Fall Times 20nsec, Timing Measurement Reference Level Volt

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.