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PD780 データシート(PDF) 7 Page - NEC

部品番号 PD780
部品情報  HIGH·PERFORMANCE CP/M® ·COMPATIBLE NMOS 8·BIT MICROPROCESSOR
PDF  24 Pages
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メーカー  NEC [NEC]
ホームページ  http://www.nec.com/
Logo NEC - NEC

PD780 データシート(HTML) 7 Page - NEC

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fttfEC
AC Characteristics (cont)
TA =
DOC to +70°C; Vcc
=
+ 5 V ± 5%; unless otherwise specified
�PD7'O (2.5 MHzI
Parameter
Symbol
Min
Max
RFSH delay from rising edge of clock to RFSH low
tOL(RF)
180
RFSH delay from rising edge of clock to RFSH high
tOH(RF)
150
WAIT setup time to falling edge of clock
tS(wr)
70
WR delay from rising edge of clock to WR low
t OL.,(WR)
80
WR delay from falling edge of clock WR low
tOl+(WR)
90
WR delay from falling edge of clock to WR high
100
Pulse width to
WR low
tW(WRL)
(13)
Notes:
(1 ) tc = tw(tH) + tw(,L) + tR
+ tF
(2) Though the structure of the 780 is static, 2OO�s is guaranteed maximum.
(3) tACM = t
w(tH) + tF
-
65 (75)' (50)"
(4) tACI = te - 70 (80)" (55)"
(5) ICA = tw(,L)
+ tR
-
50 (40)* (501'*
(6) ICAF = twitL)
+ tR
-
45
(60)' (40)"'
(7) tOCM = tc - 170 (210)' (140)*'
(8) tOCI
=
tw{,L)
+ tR
-
170 (210)' (140)"
(9) tCOF
=
tw
ltL) + tR
-
70 (80)* (55)*'
(10) tMR
=
2tc
+ 'witH) + tF
-
65 (80)' (50)"
(11) tw(MRL)
=
tc - 30 (40)' (30)*'
(12) Iw(MRH)
=
twitH) + IF
-
20 (30)' (20)"
(13) tw(WR)
=
tc - 30 (40)* (30)*'
, These values apply to the flPD780.
" These values apply to the flPD780-2.
Load Circuit for Output
FromOutput
"..,,-, .. 10K 2.2K
83-OOO884A
�PD780
Umlls
�PD71O·1(4 MHzl
�PD78.2 (6 MHz)
Test
Min
Max
Min
Max
Unit
Conditions
130
110
ns
CL
:
30
pF
120
100
ns
70
60
ns
65
60
ns
80
70
ns
80
70
ns
(13 )
(13 )
ns
4-9



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