DS89C420 View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated

Part Name

Description

MFG CO.

DS89C420

Ultra-High-Speed Microcontroller

Dallas Semiconductor -> Maxim Integrated 

POWER CYCLE TIMING CHARACTERISTICS

(VCC = 4.5V to 5.5V; TA = -40°C to +85°C) (Note 1)

PARAMETER

SYMBOL MIN

TYP

Crystal Startup Time

tCSU

8

Power-On Reset Delay

tPOR

65,536

DS89C420

MAX

UNITS

ms

tCLCL

NOTES

2

3

Note 1: Specifications to -40°C are guaranteed by design and not production tested.

Note 2: Startup time for a crystal varies with load capacitance and manufacturer. Time shown is for a 11.0592MHz crystal manufactured by Fox

Electronics.

Note 3: Reset delay is a synchronous counter of crystal oscillations after crystal startup. Counting begins when the level on the XTAL1 pin

meets the VIH2 criteria. At 33MHz, this time is 1.99ms.

FLASH MEMORY PROGRAMMING CHARACTERISTICS

(VCC = 4.5V to 5.5V; TA = +21°C to +27°C)

PARAMETER

SYMBOL MIN

TYP

Oscillator Frequency

1 / tCLCL

4

Address Setup to PROG Low

tAVGL

48tCLCL

Address Hold After PROG

Data Setup to PROG Low

tGHAX

tDVGL

48tCLCL

48tCLCL

Data Hold After PROG

tGHDX

48tCLCL

PROG Pulse Width

Address to Data Valid

tGLGH

85

tAVQV

Enable Low to Data Valid

tELQV

Data Float After Enable

PROG High to PROG Low

tEHQZ

0

tGHGL

10

MAX

6

UNITS

MHz

100

ms

48tCLCL

48tCLCL

48tCLCL

ms

54 of 59

Share Link: