3.3 VOLT 256K X 16 EDO PAGE MODE
CMOS DYNAMIC RAM
OPTIONAL SELF REFRESH
HIGH PERFORMANCE 35404550
Max. RAS
Max. Column Address Access Time, (t
Min. Fast Page Mode Cycle Time, (t
Min. Read/Write Cycle Time, (t
Access Time, (t
Features
256K x 16-bit organization
EDO Page Mode for a sustained data rate
of 71 MHz
access time: 35, 40, 45, 50 ns
RAS
Dual CAS Inputs
Low power dissipation
Read-Modify-Write, RAS
CAS-Before-RAS Refresh, and Self Refresh
Optional Self Refresh (V53C16258SL)
Refresh Interval: Standard: 512 cycles/8ms
Available in 40-pin 400 mil SOJ and
40/44L-pin 400 mil TSOP-II packages
Single +3.3V ± 0.3V Power Supply
TTL Interface
)35 ns40 ns45 ns50 ns
RAC
)18 ns20 ns22 ns24 ns
CAA
)14 ns15 ns17 ns19 ns
PC
)70 ns75 ns80 ns90 ns
RC
Description
The V53C16258L is a 262,144 x 16 bit highperformance CMOS dynamic random access
memory. The V53C16258L offers Page mode with
Extended Data Output. An address, CAS
input capacitances are reduced to one quarter
when the x4 DRAM is used to construct the same
-Only Refresh,
memory density. The V53C16258L has symmetric
address and accepts 512 cycle 8ms interval.
All inputs are TTL compatible. EDO Page Mode
operation allows random access up to 512 x 16 bits,
within a page, with cycle times as short as 15ns.
The V53C16258L is ideally suited for a wide
variety of high performance portable computer
systems and peripheral applications.
TA = 0°C to 70°C, VCC = +3.3 V ±0.3V, VSS = 0V unless otherwise noted
AC Test conditions, input pulse levels 0 to 3V
35404550
#SymbolParameter
1t
2t
3t
4t
5t
6t
7t
8t
9t
10t
11t
12t
13t
14t
15t
RAS
RC
RP
CSH
CAS
RCD
RCS
ASR
RAH
ASC
CAH
RSH (R)
CRP
RCH
RRH
RAS Pulse Width357540754575K5075Kns
Read or Write Cycle Time70758090ns
RAS Precharge Time25252530ns
CAS Hold Time35404550ns
CAS Pulse Width6789ns
RAS to CAS Delay1324172818321936ns
Read Command Setup Time0000ns4
Row Address Setup Time0000ns
Row Address Hold Time6789ns
Column Address Setup Time0000ns
Column Address Hold Time55567ns
RAS Hold Time (Read Cycle)1010101010ns
CAS to RAS Precharge Time5555ns
Read Command Hold Time Referenced
RAS Hold Time Referenced to OE78910ns
Access Time from OE11121314ns12
Access Time from CAS11121314ns6, 7, 14
Access Time from RAS35404550ns6, 8, 9
Access Time from Column Address18202224ns6, 7, 10
OE or CAS to Low-Z Output0000ns16
OE or CAS to High-Z Output06060708ns16
Column Address Hold Time from RAS25303540ns
RAS to Column Address Delay Time1020122013231426ns11
RAS or CAS Hold Time in Write Cycle10101010ns
Write Command to CAS Lead Time8121314ns
Write Command Setup Time0000ns12, 13
Write Command Hold Time5567ns
Write Pulse Width5567ns
Write Command Hold Time from RAS25303540ns
Write Command to RAS Lead Time10121314ns
Data in Setup Time0000ns14
V53C16258L Rev. 1.1 June 1999
5
MOSEL VITELIC
V53C16258L
AC Characteristics
(Cont’d)
#SymbolParameter
33t
34t
35t
36t
37t
38t
39t
40t
41t
42t
43t
44t
45t
46t
47t
48t
49t
50t
51t
52t
53t
54t
55t
DH
WOH
OED
RWC
RRW
CWD
RWD
CRW
AWD
PC
CP
CAR
CAP
DHR
CSR
RPC
CHR
PCM
COH
OES
OEH
OEP
T
Data in Hold Time5567ns14
Write to OE Hold Time5678ns14
OE to Data Delay Time5678ns14
Read-Modify-Write Cycle Time90110115130ns
Read-Modify-Write Cycle RAS Pulse
Width
CAS to WE Delay23303234ns12
RAS to WE Delay in Read-
Modify-Write Cycle
CAS Pulse Width (RMW)34485052ns
Col. Address to WE Delay29384142ns12
EDO Page Mode Read or Write Cycle
Time
CAS Precharge Time4567ns
Column Address to RAS Setup Time18202224ns
Access Time from Column Precharge20232527ns7
Data in Hold Time Referenced to RAS25303540ns
CAS Setup Time CAS-before-RAS
Refresh
RAS to CAS Precharge Time0000ns
CAS Hold Time CAS-before-RAS Refresh8101010ns
EDO Page Mode Read-Modify-Write
Cycle Time
Output Hold After CAS Low3555ns
OE Low to CAS High Setup Time3555ns
OE Hold Time from WE during
Read-Modify Write Cycle
OE High Pulse Width8101010ns
Transition Time (Rise and Fall)1.5501.5501.5501.550ns15
Optional Self Refresh
35404550
Unit NotesMin. Max. Min. Max. Min. Max. Min. Max.
59758087ns
46586268ns12
14151719ns
8101010ns
43606570ns
5101010ns
56t
REF
57t
RASS
58t
RPS
59t
CHS
60t
CHD
V53C16258L Rev. 1.1 June 1999
Refresh Interval (512 Cycles)8888ms17
RAS Pulse Width During Self Refresh100100100100µs18
RAS Precharge Time During Self Refresh100100100100µs18
CAS Hold Time Width During Self Refresh100100100100µs18
CAS Low Time During Self Refresh100100100100µs18
6
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