SCHOTTKY BIPOLAR 8216/8226

WAVEFORMS

INPUTS

-'X'-:,_5V

_

l--tFD

OUTPUT

ENABLE

.5V

---+---VOH

fVOL

.5V

A.C. CHARACTERISTICS

TA = O°C to +70°C, Vcc = +5V ±5%

 

 

 

Limits

 

 

 

Symbol

Parameter

Min.

Typ,£1]

Max.

Unit

Conditions

TpD1

Input to Output Delay DO Outputs

 

15

25

ns

CL=30pF,R 1=300n

 

 

 

 

 

 

R2=600n

TpD2

Input to Output Delay DB Outputs

 

 

 

 

 

 

8216

 

20

30

ns

C L=300pF,R 1=90n

 

8226

 

16

25

ns

R 2 = 180n

TE

Output Enable Time

 

 

 

 

 

 

8216

 

45

65

ns

(Note 2)

 

8226

 

35

54

ns

(Note 3)

To

Output Disable Time

 

20

35

ns

(Note 4)

TEST CONDITIONS:

TEST LOAD CI RCUIT

 

Input pulse amplitude of 2.5V.

 

 

Input rise and fall times of 5 ns between 1 and 2 volts.

 

 

Output loading is 5 rnA and 10 pF.

OUT 0---

------

Speed measurements are made at 1.5 volt levels.

 

 

Capacitance [5]

 

 

 

Limits

 

 

Symbol

Parameter

Min.

Typ'£1]

Max.

Unit

CIN

Input Capacitance

 

4

8

pF

COUT1

Output Capacitance

 

6

10

pF

CO UT2

Output Capacitance

 

13

18

pF

TEST CONDITIONS: VB1AS = 2.5V, Vcc = 5.0V, TA = 25°C, f = 1 MHz.

NOTES: 1. Tvpical values are for TA = 25°C, VCC = 5.0V.

2.DO Outputs, CL = 30pF, R1 = 300/10 Kil, R2 = 180/1 Kil; DB Outputs, CL = 300pF, Rl = 90/10 Kil, R2 = 180/1 Kil.

3.DO Outputs, CL = 30pF, Rl = 300/10 Kil, R2 = 600/1 K; DB Outputs, CL = 300pF, Rl =90/10 Kfl, R2 =180/1 Kil.

4.DO Outputs, CL = 5pF, Rl = 300/10 Kil, R2 = 600/1 Kil; DB Outputs, CL = 5pF, R1 = 90/10 Kil, R2 = 180/1 Kil.

5.This parameter is periodically sampled and not 100% tested.

5-167

Page 237
Image 237
Intel 8080 manual Waveforms, Out

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.