is42g32256 ETC-unknow, is42g32256 Datasheet - Page 31

• Manufacturer Part Number: is42g32256
• Description: 256k 16-mbit Synchronous Graphics
• Manufacturer: ETC-unknow

IS42G32256
Table 20. AC Characteristics
Symbol
Notes:
1.
2.
3.
4.
5.
Integrated Silicon Solution, Inc.
ADVANCE INFORMATION SR037-0C
09/10/98
t
t
t
t
t
t
t
t
t
t
t
t
BDPL
t
BWC
t
t
t
t
t
t
t
t
CKS
CKH
CKA
t
t
t
RAS
t
RCD
RRD
t
DPL
DAL
REF
CHI
OH
CK
AC
CL
HZ
DS
DH
AS
AH
CS
CH
RC
RP
t
LZ
T
When power is first applied, memory operation should be started 100 s after Vcc and VccQ reach their stipulated voltages.
Also note that the power-on sequence must be executed before starting memory operation.
Measured with t
The reference level is 1.4V when measuring input signal timing. Rise and fall times are measured between V
(max.).
Access time is measured at 1.4V with the load shown in the figure below.
The time t
(max.) when the output is in the high impedance state.
Clock Cycle Time
Access Time From CLK
CLK HIGH Level Width
CLK LOW Level Width
Output Data Hold Time
Output LOW Impedance Time
Output HIGH Impedance Time
Input Data Setup Time
Input Data Hold Time
Address Setup Time
Address Hold Time
CKE Setup Time
CKE Hold Time
CKE to CLK Recovery Delay Time
Command Setup Time (
Command Hold Time (
Command Period (REF to REF / ACT to ACT)
Command Period (ACT to PRE)
Command Period (PRE to ACT)
CAS
Command Period (ACT [0] to ACT[1])
Last Data In To Precharge
Command Delay Time
Last Data In To Active / Refresh
Command Delay time
(Auto-Precharge, same bank)
Block Write to Precharge Command Delay Time
Block Write Cycle Time
Transition Time
Refresh Cycle Time
HZ
Parameter
to
(max.) is defined as the time required for the output voltage to transition by
RAS
T
= 1 ns.
Delay
(1,2,3)
CS
(4)
CS
,
,
RAS
RAS
(5)
,
,
CAS
CAS
CAS
CAS
CAS
CAS
CAS
CAS
CAS
CAS
CAS
CAS
CAS
CAS
CAS
,
,
WE
WE
, DQM, DSF)
Latency = 3
Latency = 2
Latency = 3
Latency = 2
Latency = 3
Latency = 2
Latency = 1
Latency = 3
Latency = 2
Latency = 3
Latency = 2
Latency = 3
Latency = 2
, DQM, DSF)
1CLK+3 —
Min. Max.
2.5
2.5
2.5
2.5
2.5
10
63
45 100,000
21
20
14
14
14
35
35
14
14
—
—
—
7
0
4
4
2
1
2
1
2
1
2
1
1
-7
—
10
—
—
—
—
—
—
—
30
32
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
6
7
6
1CLK+3 —
Min. Max.
2.5
2.5
2.5
2.5
2.5
2.5
2.5
12
—
—
72
48 102,000
24
20
16
16
16
40
40
16
16
—
8
3
3
0
4
4
1
1
1
1
1
-8
200 mV from V
6.5
12
30
32
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
8
8
1CLK+3 —
Min. Max.
3.5
3.5
2.5
2.5
2.5
10
13
90
50 102,000
26
20
20
20
20
50
50
20
20
—
—
—
0
4
4
3
1
3
1
3
1
3
1
1
OH
-10
(min.) or V
IH
(min.) and V
—
—
—
—
—
—
—
—
10
14
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
30
32
7
9
ISSI
OL
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
IL
31
®