Cypress STK12C68-5 manual AC Switching Characteristics, Switching Waveforms, Parameter

Page 9

STK12C68-5 (SMD5962-94599)

AC Switching Characteristics

SRAM Read Cycle

Parameter

Description

 

35 ns

 

55 ns

Unit

Cypress

Alt

Min

 

Max

Min

 

Max

Parameter

 

 

 

 

 

 

 

 

 

 

 

 

 

tACE

tELQV

Chip Enable Access Time

 

 

35

 

 

55

ns

tRC [7]

tAVAV, tELEH

Read Cycle Time

35

 

 

55

 

 

ns

tAA [8]

tAVQV

Address Access Time

 

 

35

 

 

55

ns

tDOE

tGLQV

Output Enable to Data Valid

 

 

15

 

 

35

ns

tOHA [8]

tAXQX

Output Hold After Address Change

5

 

 

5

 

 

ns

tLZCE [9]

tELQX

Chip Enable to Output Active

5

 

 

5

 

 

ns

tHZCE [9]

tEHQZ

Chip Disable to Output Inactive

 

 

10

 

 

12

ns

tLZOE [9]

tGLQX

Output Enable to Output Active

0

 

 

0

 

 

ns

tHZOE [9]

tGHQZ

Output Disable to Output Inactive

 

 

10

 

 

12

ns

tPU [6]

tELICCH

Chip Enable to Power Active

0

 

 

0

 

 

ns

tPD [6]

tEHICCL

Chip Disable to Power Standby

 

 

35

 

 

55

ns

Switching Waveforms

Figure 8. SRAM Read Cycle 1: Address Controlled [7, 8]

$''5(66

W5&

W$$

W2+$

'4 '$7$287

'$7$9$/,'

Figure 9. SRAM Read Cycle 2: CE and OE Controlled [7]

$''5(66

&(

2(

'4 '$7$287

,&&

W5&

W$&(

W/=&(

W'2(

W/=2(

W38 $&7,9(

67$1'%<

W3'

W+=&(

W+=2(

'$7$9$/,'

Notes

7.WE and HSB must be High during SRAM Read cycles.

8.Device is continuously selected with CE and OE both Low.

9.Measured ±200 mV from steady state output voltage.

Document Number: 001-51026 Rev. **

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Contents Logic Block Diagram FeaturesFunctional Description Cypress Semiconductor Corporation 198 Champion CourtPin Definitions PinoutsSram Read Device OperationSram Write AutoStore OperationHardware Recall Power Up AutoStore Inhibit ModeHardware Store HSB Operation Software StoreData Protection Low Average Active PowerNoise Considerations Hardware ProtectHardware Mode Selection A12-A0 Mode PowerBest Practices Range Ambient Temperature DC Electrical CharacteristicsMaximum Ratings Operating RangeCapacitance Data Retention and EnduranceThermal Resistance AC Test ConditionsSwitching Waveforms AC Switching CharacteristicsParameter Description 35 ns 55 ns Unit Cypress Alt Min Max ParameterSram Write Cycle 2 CE Controlled 11 Sram Write Cycle 1 WE Controlled 11AutoStore or Power Up Recall Switching WaveformParameter Alt Description STK12C68-5 Unit Min Max Parameter Alt Description 35 ns 55 ns Unit Min Max Software Controlled STORE/RECALL CycleHardware Store Cycle Hardware Store CycleSMD5962 94599 01 MX Part Numbering Nomenclature STK12C68 5 C 35 MPin LCC 350 mil Ordering InformationPin 300-Mil Side Braze DIL Package DiagramsPad 350-Mil LCC Sales, Solutions, and Legal Information New data sheetDocument History