80387DX View Datasheet(PDF) - MAXWELL TECHNOLOGIES

Part Name

Description

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80387DX

Math Coprocessor

MAXWELL TECHNOLOGIES 

Math Coprocessor

80387DX

TABLE 8. 80387DX TIMING REQUIREMENTS OF THE BUS INTERFACE UNIT (OUTPUT TRIP LEVEL = 1.5V)

(VCC = 4.75V TO 5.25V; TA = -55 TO +125°C, UNLESS OTHERWISE SPECIFIED)

PARAMETER

CONDITIONS

SYMBOL

MIN

MAX

UNIT

NPS1, NPS2 Hold Time

-16

-20

-25

STEN Setup Time

-16

-20

-25

STEN Hold Time

-16

-20

-25

t17

ns

2

--

2

--

4

--

t16

ns

21

--

21

--

15

--

t17

ns

2

--

2

--

4

--

RESETIN Setup Time

-16

-20

-25

RESETIN Hold Time

-16

-20

-25

1. Guaranteed By Design

t18

ns

13

--

12

--

10

--

t19

ns

4

--

4

--

3

--

2. Float condition occurs when maximum output current becomes less than ILO in magnitude. Float Delay is not tested.

TABLE 9. 80387DX TIMING REQUIREMENT OF OTHER PARAMETER

PARAMETER

SYMBOL

MIN

MAX

RESETIN Duration

t30

40

RESETIN Inactive to First Opcode Write

t31

50

BUSY Duration

t32

6

ERROR Inactive to BUSY Inactive

t33

6

PEREQ Inactive to ERROR Active

t34

6

READY Active to Busy Active

t35

4

4

READY Minimum Time from Opcode Write to Opcode to Opcode/

t36

6

Operand Write

READY Minimum Time from Operand Write to Operand Write

t37

8

UNIT

(387 CLK2)

(387 CLK2)

(386 CLK2)

(386 CLK2)

(386 CLK2)

(386 CLK2)

(386 CLK2)

(386 CLK2)

05.07.02 REV 1

All data sheets are subject to change without notice 7

©2002 Maxwell Technologies

All rights reserved.

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