AC ELECTRICA L CHARACTERISTICS
1,2,3
(TA = 0 to +70°C, VCC = 5.0 V ±10%)
PARAMETER SYMBOL
LH5P8129-60 LH5P8129-80 LH5P8129-10
UNIT NOTE
MIN. MAX. MIN. MAX. MIN. MAX.
Rand om read , w rit e c ycl e t ime t
RC
100 130 160 ns
Read mo dif y wr ite cy cle ti me
t
RMW
165 195 235 ns
CE p uls e w idt h t
CE
60 10,000 80 10,000 100 10,000 ns
CE p rec har ge t ime
t
P
40 40 50 ns
CS s etu p t ime
t
CSS
000ns
CS h old ti me t
CS H
15 20 25 ns
Addr ess se tup ti me
t
AS
000ns4
Addr ess ho ld time
t
AH
15 20 25 ns 4
Read co mma nd s et up t ime
t
RCS
000ns
Read co mma nd h ol d ti me
t
RCH
000ns
CE a cce ss tim e
t
CEA
60 80 100 ns 5
OE a cce ss tim e t
OEA
25 30 35 ns 5
CE t o o utpu t i n L ow- Z t
CLZ
20 20 20 ns
OE to output in Low-Z
t
OLZ
000ns
Outp ut e na ble fro m e nd o f w rit e t
WLZ
000ns
Chip di sab le to o utp ut in Hig h-Z t
CHZ
20 25 30 ns
Outp ut d is abl e to ou tpu t i n H igh -Z
t
OHZ
20 25 30 ns
Write ena ble to ou tpu t in Hi gh- Z t
WHZ
20 25 30 ns
OE s etu p ti me t
OES
000ns
OE h old tim e t
OEH
10 10 10 ns
Write com man d p uls e w idt h t
WP
30 30 30 ns
Write com man d s etu p t ime t
WCS
30 30 30 ns
Write com man d h old ti me t
WCH
40 50 60 ns
Data se tup tim e f rom wri te t
DSW
25 30 35 ns 6
Data se tup tim e f rom
CE t
DS C
25 30 35 ns 6
Data ho ld t ime fr om w rit e t
DHW
000ns6
Data ho ld t ime fr om
CE t
DHC
000ns6
Transi tion time (ris e and fall) t
T
335335335ns
Refr esh tim e i nte rva l t
REF
888ms
Refr esh co mman d h old ti me t
RHC
15 15 15 ns
Auto re fres h c yc le t ime t
FC
100 130 160 ns
Refr esh de lay tim e f rom
CE t
RFD
30 40 50 ns
Refr esh pu lse wi dth
(Aut o re fre sh)
t
FAP
30 8,000 30 8,000 30 8,000 ns
Refr esh pre ch arge ti me
(Aut o re fre sh)
t
FP
30 30 30 ns
Refr esh pu lse wi dth (Se lf ref res h) t
FAS
8,000 8,000 8,000 ns
CE d ela y t ime fro m re fre sh
prec har ge ( Sel f r efr esh )
t
FR S
140 160 190 ns
NOTES:
1.
In order t o initialize the circuit, an initial pause of 100 µs with
CE = VIH, RFSH = VIH after po wer-up, f ollowed by at least 8
dummy cycles.
2. AC characteristics are m easur ed at tT = 5 ns.
3. AC characteristics are measured at the following condition (see
figure at right).
4. M easured with a load equivalent to 2TTL + 100 pF.
5. Address is latched at the negative edge of
CE.
6. Data is latched at the positive edge of R/W or at the positive
edge of
CE.
2.4 V
0.8 V
2.6 V
0.6 V
2.2 V
0.8 V
OUTPUT
INPUT
5P8129-4
Figure 4. AC Characteristics
CMOS 1M (128K × 8) Pseudo-Static RAM LH5P8129
5