IC41C16257 Datasheet, PDF (8/20 Pages) Integrated Circuit Solution Inc – 256K x 16 (4-MBIT) DYNAMIC RAM WITH FAST PAGE MODE

IC41C16257/IC41C16257S
IC41LV16257/IC41LV16257S
AC CHARACTERISTICS^{(1,2,3,4,5,6)}
(Recommended Operating Conditions unless otherwise noted.)
Symbol Parameter
tRC
Random READ or WRITE Cycle Time
tRAC
Access Time from RAS^{(6, 7)}
tCAC
Access Time from CAS^{(6, 8, 15)}
tAA
Access Time from Column-Address⁽⁶⁾
tRAS
RAS Pulse Width
tRP
RAS Precharge Time
tCAS
CAS Pulse Width⁽²⁶⁾
tCP
CAS Precharge Time^{(9, 25)}
tCSH
CAS Hold Time ⁽²¹⁾
tRCD
RAS to CAS Delay Time^{(10, 20)}
tASR
Row-Address Setup Time
tRAH
Row-Address Hold Time
tASC
Column-Address Setup Time⁽²⁰⁾
tCAH
Column-Address Hold Time⁽²⁰⁾
tAR
Column-Address Hold Time
(referenced to RAS)
tRAD
RAS to Column-Address Delay Time⁽¹¹⁾
tRAL
Column-Address to RAS Lead Time
tRPC
RAS to CAS Precharge Time
tRSH
RAS Hold Time⁽²⁷⁾
tCLZ
CAS to Output in Low-Z^{(15, 29)}
tCRP
CAS to RAS Precharge Time⁽²¹⁾
tOD
Output Disable Time^{(19, 28, 29)}
tOE
Output Enable Time^{(15, 16)}
tOES
OE LOW to CAS HIGH Setup Time
tRCS
Read Command Setup Time^{(17, 20)}
tRRH Read Command Hold Time
(referenced to RAS)⁽¹²⁾
tRCH Read Command Hold Time
(referenced to CAS)^{(12, 17, 21)}
tWCH
Write Command Hold Time^{(17, 27)}
tWCR Write Command Hold Time
(referenced to RAS)⁽¹⁷⁾
tWP
Write Command Pulse Width⁽¹⁷⁾
tRWL
Write Command to RAS Lead Time⁽¹⁷⁾
tCWL
Write Command to CAS Lead Time^{(17, 21)}
tWCS
Write Command Setup Time^{(14, 17, 20)}
tDHR
Data-in Hold Time (referenced to RAS)
-35
Min. Max.
60 —
— 35
— 10
— 18
35 10K
20 —
6 10K
5—
35 —
11 28
0—
6—
0—
6—
30 —
-50
Min. Max.
90 —
— 50
— 14
— 25
50 10K
30 —
8 10K
8—
50 —
19 36
0—
8—
0—
8—
40 —
12 20
18 —
0—
8—
3—
5—
3 15
— 10
5—
0—
0—
14 25
25 —
0—
14 —
3—
5—
3 15
— 15
5—
0—
0—
0—
0—
5—
30 —
8—
40 —
5—
8—
8—
0—
30 —
8—
14 —
14 —
0—
40 —
-60
Min. Max. Units
110 —
ns
— 60
ns
— 15
ns
— 30
ns
60 10K ns
40 —
ns
10 10K ns
10 —
ns
60 —
ns
20 45
ns
0—
ns
10 —
ns
0—
ns
10 —
ns
40 —
ns
15 30
ns
30 —
ns
0—
ns
15 —
ns
3—
ns
5—
ns
3 15
ns
— 15
ns
5—
ns
0—
ns
0—
ns
0—
ns
10 —
ns
50 —
ns
10 —
ns
15 —
ns
15 —
ns
0—
ns
45 —
ns
(Continued)
8
Integrated Circuit Solution Inc.
DR021-0A 08/11/2001