HN58C256A Datasheet, PDF (6/25 Pages) Hitachi Semiconductor – 256k EEPROM (32-kword x 8-bit) Ready/Busy and RES function (HN58C257A)

HN58C256A Series, HN58C257A Series
AC Characteristics (Ta = 0 to +70°C, V_CC = 5 V±10%)
Test Conditions
• Input pulse levels: 0.4 V to 3.0 V
0 V to V_CC (RES pin*²)
• Input rise and fall time: ≤ 5 ns
• Input timing reference levels: 0.8, 2.0 V
• Output load: 1TTL Gate +100 pF
• Output reference levels: 1.5 V, 1.5 V
Read Cycle
Parameter
Address to output delay
HN58C256A/HN58C257A
-85
-10
Symbol Min Max Min Max
t _ACC
—
85
—
100
CE to output delay
OE to output delay
Address to output hold
t _CE
—
85
—
100
t _OE
10
40
10
50
t _OH
0
—
0
—
OE (CE) high to output float*¹ t_DF
0
40
0
40
RES low to output float*^{1, 2}
t _DFR
0
350 0
350
RES to output delay*²
t _RR
0
450 0
450
Unit
ns
ns
ns
ns
ns
ns
ns
Test conditions
CE = OE = V_IL,
WE = V_IH
OE = V_IL, WE = V_IH
CE = V_IL, WE = V_IH
CE = OE = V_IL,
WE = V_IH
CE = V_IL, WE = V_IH
CE = OE = V_IL,
WE = V_IH
CE = OE = V_IL,
WE = V_IH
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