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SED1520 Series
2–24 EPSON
• MPU Bus Read/Write II (68-family MPU)
Ta = –20 to 75 deg. C, VSS = –5 V ±10 unless stated otherwise
Rating
Parameter Symbol Condition Unit Signal
Min. Max.
System cycle time t
CYC6 1000 — ns
Address setup time t
AW6 20 — ns A0, CS, R/W
Address hold time t
AH6 10 — ns
Data setup time t
DS6 80 — ns
Data hold time t
DH6 10 — ns
D0 to D7
Output disable time t
OH6 10 60 ns
C
L = 100 pF
Access time t
ACC6 —90ns
Enable Read 100 — ns
tEW E
pulsewidth Write 80 — ns
Rise and fall time tr, tf — — 15 ns —
(V
SS = –2.7 to – 4.5 V, Ta = –20 to +75°C)
Rating
Parameter Symbol Condition Unit Signal
Min. Max.
System cycle time
*1
tCYC6 — 2000 — ns
Address setup time t
AW6 40 — ns A0, CS, R/W
—
Address hold time t
AH6 20 — ns
Data setup time t
DS6 160 — ns
—
Data hold time t
DH6 20 — ns
D0 to D7
Output disable time t
OH6 20 120 ns
C
L = 100 pF
Access time t
ACC6 — 180 ns
Enable Read 200 — ns
tEW —E
pulse width Write 160 — ns
Rise and fall time tr, tf — — 15 ns —
Notes: 1. t
CYC6 is the cycle time of CS. E = H, not the cycle time of E.
t
CYC6
t
EW
t
DS6
t
AW6
E
D0 to D7
(WRITE)
t
r
t
f
t
DH6
t
OH6
t
AH6
D0 to D7
(READ)
t
ACC6
R/W
A0,CS