Cypress CY7C1541V18, CY7C1543V18 manual Switching Characteristics, Parameter Min Max, High, Low

CY7C1541V18, CY7C1556V18

CY7C1543V18, CY7C1545V18

Switching Characteristics

Over the Operating Range [23, 24]

CY

Consortium

Description

375 MHz

333 MHz

300 MHz

Unit

Parameter

Parameter

Min

Max

Min

Max

Min

Max

t

POWER

V (Typical) to the First Access [25]

1

1

1

ms

DD

tCYC

tKHKH

K Clock Cycle Time

2.66

8.40

3.0

8.40

3.3

8.40

ns

tKH

tKHKL

Input Clock (K/K)

HIGH

0.4

–

0.4

0.4

–

tCYC

tKL

tKLKH

Input Clock (K/K)

LOW

0.4

–

0.4

0.4

–

tCYC

tKHKH

tKHKH

K Clock Rise to

K

Clock Rise (rising edge to rising edge)

1.13

–

1.28

–

1.40

–

ns

Setup Times

tSA

tAVKH

Address Setup to K Clock Rise

0.4

–

0.4

–

0.4

–

ns

tSC

tIVKH

Control Setup to K Clock Rise

(RPS,

WPS)

0.4

–

0.4

–

0.4

–

ns

tSCDDR

tIVKH

Double Data Rate Control Setup to Clock (K/K)

Rise

0.28

–

0.28

–

0.28

–

ns

(BWS0, BWS1, BWS2, BWS3)

tSD

tDVKH

D[X:0] Setup to Clock (K/K)

Rise

0.28

–

0.28

–

0.28

–

ns

Hold Times

tHA

tKHAX

Address Hold after K Clock Rise

0.4

–

0.4

–

0.4

–

ns

tHC

tKHIX

Control Hold after K Clock Rise

(RPS,

WPS)

0.4

–

0.4

–

0.4

–

ns

tHCDDR

tKHIX

Double Data Rate Control Hold after Clock (K/K)

Rise

0.28

–

0.28

–

0.28

–

ns

(BWS0, BWS1, BWS2, BWS3)

tHD

tKHDX

D[X:0] Hold after Clock (K/K)

Rise

0.28

–

0.28

–

0.28

–

ns

Output Times

tCO

tCHQV

K/K

Clock Rise to Data Valid

–

0.45

–

0.45

–

0.45

ns

tDOH

tCHQX

Data Output Hold after Output K/K

Clock Rise

–0.45

–

–0.45

–

–0.45

–

ns

(Active to Active)

tCCQO

tCHCQV

K/K

Clock Rise to Echo Clock Valid

–

0.45

–

0.45

–

0.45

ns

tCQOH

tCHCQX

Echo Clock Hold after K/K

Clock Rise

–0.45

–

–0.45

–

–0.45

–

ns

tCQD

tCQHQV

Echo Clock High to Data Valid

0.2

0.2

0.2

ns

tCQDOH

tCQHQX

Echo Clock High to Data Invalid

–0.2

–

–0.2

–

–0.2

–

ns

tCQH

tCQHCQL

Output Clock (CQ/CQ)

HIGH [26]

0.88

–

1.03

–

1.15

–

ns

tCQHCQH

tCQHCQH

CQ Clock Rise to

CQ

Clock Rise [26]

0.88

–

1.03

–

1.15

–

ns

(rising edge to rising edge)

tCHZ

tCHQZ

Clock (K/K)

Rise to High-Z (Active to High-Z) [27, 28]

–

0.45

–

0.45

–

0.45

ns

tCLZ

tCHQX1

Clock (K/K)

Rise to Low-Z [27, 28]

–0.45

–

–0.45

–

–0.45

–

ns

tQVLD

tCQHQVLD

Echo Clock High to QVLD Valid [29]

–0.20

0.20

–0.20

0.20

–0.20

0.20

ns

DLL Timing

tKC Var

tKC Var

Clock Phase Jitter

–

0.20

–

0.20

–

0.20

ns

tKC lock

tKC lock

DLL Lock Time (K)

2048

–

2048

–

2048

–

Cycles

tKC Reset

tKC Reset

K Static to DLL Reset [30]

30

30

30

ns

Notes

24.When a part with a maximum frequency above 300MHz is operating at a lower clock frequency, it requires the input timings of the frequency range in which it is being operated and outputs data with the output timings of that frequency range.

25.This part has a voltage regulator internally; tPOWER is the time that the power needs to be supplied above VDD minimum initially before a read or write operation can be initiated.

26.These parameters are extrapolated from the input timing parameters (tKHKH-250ps, where 250ps is the internal jitter. An input jitter of 200ps(tKCVAR) is already included in the tKHKH). These parameters are only guaranteed by design and are not tested in production.

27.tCHZ, tCLZ, are specified with a load capacitance of 5 pF as in part (b) of “AC Test Loads and Waveforms” on page 22. Transition is measured ± 100 mV from steady-state voltage.

28.At any given voltage and temperature tCHZ is less than tCLZ and tCHZ less than tCO.

29.tQVLD spec is applicable for both rising and falling edges of QVLD signal.

30.Hold to >VIH or <VIL.

Document Number: 001-05389 Rev. *F Page 23 of 28

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