DS5000 datasheet(15/19 Pages) DALLAS

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DS5000(T)

15 of 19

AC CHARACTERISTICS (cont'd)

PARALLEL PROGRAM LOAD TIMING

(tA=0°C to 70°C; VCC=5V ± 5%)

PARAMETER

SYMBOL

MIN

MAX

UNITS

40 Oscillator Frequency

1/tCLK

1.0

12.0

MHz

41 Address Setup to PROG Low

tAVPRL

42 Address Hold after PROG High

tPRHAV

43 Data Setup to PROG Low

tDVPRL

44 Data Hold after PROG High

tPRHDV

45 P2.7, 2.6, 2.5 Setup to VPP

tP27HVP

46 VPP Setup to PROG Low

tVPHPRL

47 VPP Hold after PROG Low

tPRHVPL

PROG

Width Low

tPRW

2400

tCLK

49 Data Output from Address Valid

tAVDV

1800*

tCLK

50 Data Output from P2.7 Low

tDVP27L

1800*

tCLK

51 Data Float after P2.7 High

tP27HDZ

1800*

tCLK

52 Delay to Reset/ PSEN Active after Power On

tPORPV

21504

tCLK

53 Reset/ PSEN Active (or Verify Inactive) to

VPP High

tRAVPH

1200

tCLK

54 VPP Inactive (Between Program Cycles)

tVPPPC

1200

tCLK

55 Verify Active Time

tVFT

2400*

tCLK

* Second set of numbers refers to expanded memory programming up to 32k bytes.

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