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LC322271J データシート(PDF) 6 Page - Sanyo Semicon Device

部品番号 LC322271J
部品情報  2 MEG (131072 words X 16 bits) DRAM Fast Page Mode, Byte Write
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メーカー  SANYO [Sanyo Semicon Device]
ホームページ  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC322271J データシート(HTML) 6 Page - Sanyo Semicon Device

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Input/Output Capacitance at Ta = 25°C, f = 1 MHz, VCC = 5 V ± 10%
Note: 6. An initial pause of 200 µs is required after power-up followed by eight RAS-only refresh cycles before proper device operation is achieved. In case
of using refresh counter, a minimum of eight CAS-before-RAS refresh cycles instead of eight RAS-only refresh cycles are required.
7. Measured at tT = 5 ns.
8. When measuring input signal timing, VIH (min) and VIL (max) are used for reference points. In addition, rise and fall time are defined between VIH
and VIL.
9. Measured using an equivalent of 50 pF and one standard TTL loads.
10. tOFF (max) and tOEZ (max) are defined as the time until output voltage can no longer be measured when output switches to a high impedance
condition.
11. Operation is guaranteed if either tRRH or tRCH is satisfied.
12. These parameters are measured from the falling edge of CAS for an early-write cycle, and from the falling edge of UW and LW for a read-
write/read-modify-write cycle.
13. tWCS, tCWD, tRWD, tAWD and tCPWD are not restrictive operating parameters for memory in that they specify the operating mode. If tWCS ≥ tWCS
(min), the cycle switches to an early-write cycle and output pins switch to high impedance throughout the cycle.
If tCWD ≥ tCWD (min), tRWD ≥ tRWD (min), tAWD ≥ tAWD (min) and tCPWD ≥ tCPWD (min) for fast page mode cycle only, the cycle switches to a
read-write/read-modify-write cycle and data output equal information in the selected cells. If neither of the above timings are satisfied, output pins
are in an undefined state.
14. tRCD (max) is not a restrictive operating parameter but instead represents the point at which the access time tRAC (max) is guaranteed. If tRCD
tRCD (max), access time is determined according to tCAC.
15. tRAD (max) is not a restrictive operating parameter but instead represents the point at which the access time tRAC (max) is guaranteed. If tRAD
tRAD (max), access time is determined according to tAA.
16. Operation is guaranteed if either tDZC or tDZO i s satisfied.
No. 5085-6/29
LC322271J, M, T-70/80
Parameter
Symbol
min
max
Unit
Note
Input capacitance (A0 to A7, A8R, RAS, CAS, UW, LW, OE)
CIN
7
pF
Input/Output capacitance (I/O1 to I/O16)
CI/O
7
pF


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