LH5P860 데이터 시트보기 (PDF) - Sharp Electronics
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LH5P860 Datasheet PDF : 13 Pages
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LH5P860
CMOS 512K (64K × 8) Pseudo-Static RAM
AC CHARACTERISTICS 1, 2, 3 (TA = 0 to +70°C, VCC = 5.0 V ±10%)
PARAMETER
SYMBOL MIN.
MAX.
UNIT
NOTE
Random read, write cycle time
tRC
140
ns
Read modify write cycle time
tRMW
205
ns
CE pulse width
tCE
80
10,000
ns
CE precharge time
tP
50
ns
Address setup time
tAS
0
ns
4
Address hold time
tAH
20
ns
4
Read command setup time
tRCS
0
ns
Read command hold time
tRCH
0
ns
CE access time
tCEA
80
ns
5
OE access time
tOEA
30
ns
5
Output enable time from CE
tCLZ
20
ns
Output enable time from OE
tOLZ
0
ns
Output enable time from R/W
tWLZ
0
ns
Output disable time from CE
tCHZ
25
ns
Output disable time from OE
tOHZ
25
ns
Output diable time from R/W
tWHZ
25
ns
OE setup time
tOES
10
ns
OE hold time
tOEH
10
ns
Write command pulse width
tWP
30
ns
Write command setup time
tWCS
30
ns
Write command hold time
tWCH
50
ns
Data setup time from R/W
tDSW
30
ns
6
Data setup time from CE
tDSC
30
ns
6
Data hold time from R/W
tDHW
0
ns
6
Data hold time from CE
tDHC
0
ns
6
Transition time (rise and fall)
tT
3
35
ns
Refresh time interval
tREF
8
ms
Refresh command hold time
tRHC
15
ns
Auto refresh cycle time
tFC
130
ns
Refresh delay time from CE
tRFD
50
ns
Refresh pulse width (Auto refresh)
tFAP
30
8,000
ns
Refresh precharge time (Auto refresh)
tFP
30
ns
Refresh pulse width (Self refresh)
tFAS
8,000
ns
CE delay time from refresh precharge (Self refresh) tFRS
160
ns
NOTES:
1. In order to initialize the circuit, an initialize pause of 100 µs with
CE1 = VIH, RFSH = VIH (or CE2 = VIL, RFSH = VIH) is required
after power-up, followed by at least 8 dummy cycles.
2. AC characteristics are measured at tT = 5 ns.
3. AC characteristics are measured at the following condition (see
figure at right):
4. Address is latched at the negative edge of CE1 or at the positive
edge of CE2.
5. Measured with a load equivalent to 2TTL + 100 pF.
6. Data is latched at the positive edge of R/W, at the positive edge
of CE1, or at the negative edge of CE2.
INPUT
OUTPUT
2.4 V
0.8 V
2.2 V
0.8 V
Figure 3. AC Characteristics
2.6 V
0.6 V
5P860-12
4
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