80C251TA 查看數據表（PDF） - Intel

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80C251TA

HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Intel 

8xC251TA/TB/TP/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Table 11. AC Characteristics (Sheet 4 of 4)

Symbol

Parameter

@ Max FOSC (1)

Min

Max

FOSC Variable

Min

Max

TAVWL1

Address (mux’d) Valid to

WR# Low

@ 16MHz

@ 24MHz

85

43.4

(1+M)

2TOSC-40

TAVWL1A

Address (mux’d) Valid to

WR# Low

@ 16MHz

@ 24MHz

72.5

51.7

(0.5+M)

2TOSC+10

TAVWL2

Address (demux’d) Valid to

WR# Low

@ 16MHz

108

@ 24MHz

66.4

(1+M)

2TOSC-17

TAVWL2A

Address (demux’d) Valid to

WR# Low

@ 16MHz

@ 24MHz

135

93.4

(1+M)

2TOSC+10

TWHQX

Data Hold after WR# High

@ 16MHz

@ 24MHz

49.5

28.7

TOSC-13

TQVWH

Data Valid to WR# High

@ 16MHz

@ 24MHz

110

68.4

(1+N)

2TOSC-15

TWHAX

WR# High to Address Hold

@ 16MHz

112

@ 24MHz

70.4

2TOSC-13

NOTES:

1. 24 MHz XTAL Frequency.

2. Specifications for PSEN# are identical to those for RD#.

3. In the formula, M = number of wait states (0 or 1) for ALE and N = Number of wait states (0,1,2 or 3) for

RD#/PSEN#/WR#.

4. Device configured with the default data float timing for fast memory interface (EDF# = 1).

5. Device configured with extended data float timing for slow memory interface (EDF# = 0).

Units

ns (3,4)

ns (3,5)

ns (3,4)

ns (3,5)

ns

ns (3)

ns

ADVANCE INFORMATION

17

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