CY7C9235(1999) 데이터 시트보기 (PDF) - Cypress Semiconductor

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CY7C9235
(Rev.:1999)

SMPTE-259M/DVB-ASI Scrambler/Controller

Cypress Semiconductor 

PRELIMINARY

CY7C9235

AC Test Loads and Waveforms

TTL OUTPUTS

5V

OUTPUT

35 pF

INCLUDING

JIG AND

SCOPE

238Ω

(a)

238Ω

5V

3.0V

OUTPUT

170Ω

5 pF

INCLUDING

JIG AND

SCOPE

Equivalent to:

OUTPUT

170 GND

< 2 ns

(b)

THÉVENIN

99 Ω

EQUIVALENT

2.08V

ALL INPUT PULSES

90%

10%

90%

10%

< 2 ns

7C9335–9

Switching Characteristics Over the Operating Range[4]

Parameter

Description

tSD

Data Set-Up Time

tHD

Data Hold Time

tCPWH

CKW Pulse Width HIGH

tCPWL

CPW Pulse Width LOW

tCKW

Write Clock Period

tA

Access Time

tH

Data Output Hold Time From CKW Rise

tEA

Input to Output Enable

tER

Input to Output Disable[5]

Notes:

4. All AC parameters are with all outputs switching.

5. Test load (b) used for this parameter. Test load (a) used for all other AC parameters.

CY7C9235-27 CY7C9235-40

Min. Max. Min. Max. Unit

10

8

ns

0

0

ns

6.5

6.5

ns

6.5

6.5

ns

30 62.5 25 62.5

ns

10

8

ns

4

3

ns

23

20

ns

23

20

ns

Switching Waveform

PD0−9, ENA, ENN,

BYPASS, TRS_FILT,

SVS_EN, SC/D_EN,

DVB_EN

CKW

Q0–9, TRS_DET,

ENA_OUT

tER

OE

tCKW

tSD

tHD

tCPWL

tEA

tCPWH

tA

tH

6

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