Cypress CY7C1241V18, CY7C1243V18, CY7C1245V18, CY7C1256V18 Switching Characteristics

CY7C1241V18, CY7C1256V18
CY7C1243V18, CY7C1245V18
Document Number: 001-06365 Rev. *D Page 23 of 28
Switching Characteristics
Over the Operating Range[22, 23]
Cypress
Parameter Consortium Parameter Description 375 MHz 333 MHz 300 MHz Unit
Min Max Min Max Min Max
tPOWER VDD(Typical) to the First Access[24] 1–1–1–ms
tCYC tKHKH K Clock Cycle Time 2.66 8.4 3.0 8.4 3.3 8.4 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–t
CYC
tKHKHtKHKHK Clock Rise to K Clock Rise (rising edge to rising edge) 1.13 – 1.28 – 1.40 – ns
Set-up Times
tSA tAVKH Address Set-up to K Clock Rise 0.4 – 0.4 – 0.4 – ns
tSC tIVKH Control Set-up to K Clock Rise (RPS, WPS) 0.4–0.4–0.4– ns
tSCDDR tIVKH Double Data Rate Control Set-up to Clock (K, K) Rise
(BWS0, BWS1, BWS2, BWS3)0.28 – 0.28 – 0.28 – ns
tSD tDVKH D[X:0] Set-up 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
(BWS0, BWS1, BWS2, BWS3)0.28 – 0.28 – 0.28 – ns
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
(Active to Active) –0.45 – –0.45 – –0.45 – ns
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[25] 0.88 – 1.03 – 1.15 – ns
tCQHCQHtCQHCQHCQ Clock Rise to CQ Clock Rise[25]
(rising edge to rising edge) 0.88 – 1.03 – 1.15 – ns
tCHZ tCHQZ Clock (K/K) Rise to High-Z (Active to High-Z)[26, 27] –0.45–0.45–0.45ns
tCLZ tCHQX1 Clock (K/K) Rise to Low-Z[26, 27] –0.45 – –0.45 – –0.45 – ns
tQVLD tCQHQVLD Echo Clock High to QVLD Valid[28] –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[29] 30–30–30– ns
Notes
23.When a part with a maximum frequency above 300 MHz 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 timing of that frequency range.
24.This part has an internal voltage regulator; tPOWER is the time that the power must be supplied above VDD minimum initially before a read or write operation can
be initiated.
25.These parameters are extrapolated from the input timing parameters (tKHKH – 250 ps, where 250 ps is the internal jitter. An input jitter of 200 ps (tKC Var) is already
included in the tKHKH). These parameters are only guaranteed by design and are not tested in production.
26.tCHZ, tCLZ are specified with a load capacitance of 5 pF as in part (b) of “AC Test Loads and Waveforms” on page22. Transition is measured ±100 mV from
steady-state voltage.
27.At any voltage and temperature tCHZ is less than tCLZ and tCHZ less than tCO.
28.tQVLD spec is applicable for both rising and falling edges of QVLD signal.
29.Hold to >VIH or <VIL.
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