Intel 8080 manual Switching Characteristics, TA = OC to + 75C Vee = +5V ± 5%, 12 pF

Models: 8080

1 262
Download 262 pages 56.67 Kb
Page 180
Image 180

SCHOTTKY BIPOLAR 8212

A.C. Characteristics

TA = O°C to + 75°C Vee = +5V ± 5%

Symbol

Parameter

 

Limits

 

Unit

Test Conditions

Min.

Typ.

Max.

 

 

 

 

tpw

Pulse Width

30

 

 

ns

 

tpd

Data To Output Delay

 

 

30

ns

 

twe

Write Enable To Output Delay

 

 

40

ns

 

tset

Data Setu·pTime

15

 

 

ns

 

th

Data Hold Time

20

 

 

ns

 

tr

Reset To Output Delay

 

 

40

ns

 

ts

Set To Output Delay

 

 

30

ns

 

te

Output Enable/Disable Time

 

 

45

ns

 

tc

Clear To Output Delay

 

 

55

ns

 

CAPACITANCE * F = 1 MHz VsrAs = 2.5V Vee = +5V TA = 25°C

Symbol

Test

LIMITS

Typ.

Max.

 

 

CIN

DS I MD Input Capacitance

9 pF

12 pF

CIN

DS2 , CK, ACK, Oil-Dis

5 pF

9 pF

 

Input Capacitance

 

 

COUT

DOl-DOs Output Capacitance

8 pF

12 pF

*This parameter is sampled and not 100% tested.

Switching Characteristics

CONDITIONS OF TEST

TEST LOAD

Input Pulse Amplitude = 2.5 V

15mA & 30pF

Input Rise and Fall Times 5 ns

 

Between 1V and 2V Measurements made at 1.5V

 

with 15 rnA &30 pF Test Load

300

 

 

TO

 

D.U.T.

 

600

 

* INCLUDING JIG & PROBE CAPACITANCE

5-112

Page 180
Image 180
Intel 8080 manual Switching Characteristics, TA = OC to + 75C Vee = +5V ± 5%, 12 pF

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.