參數(shù)資料
型號(hào)： TMS44409P
廠商： Texas Instruments, Inc.
英文描述： 1048576-WORD BY 4-BIT DYNAMIC RANDOM-ACCESS MEMORY
中文描述： 1048576字4位動(dòng)態(tài)隨機(jī)存取存儲(chǔ)器
文件頁(yè)數(shù)： 1/26頁(yè)
文件大小： 413K
代理商： TMS44409P
TMS44409, TMS44409P
1048576-WORD BY 4-BIT
DYNAMIC RANDOM-ACCESS MEMORY
SMHS563 – JULY1995
1
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
Organization . . . 1048576
×
4
Single 5-V Power Supply (
±
10% Tolerance)
Performance Ranges:
ACCESS
ACCESS
TIME
TIME
(tRAC)
(tCAC)
(MAX)
(MAX)
’44409/P-60
60 ns
15 ns
’44409/P-70
70 ns
18 ns
’44409/P-80
80 ns
20 ns
Extended Data Out (EDO) Operation
CAS-Before-RAS (CBR) Refresh
3-State Unlatched Output
Low Power Dissipation
All Inputs/Outputs and Clocks are
TTL-Compatible
Long Refresh Period
– 1 024 Cycle Refresh in 16 ns (max)
– 128 ms on Low Power, Self-Refresh
Version (TMS44409P Only)
Operating Free-Air Temperature Range
0
°
C to 70
°
C
ACCESS
TIME
(tAA)
(MAX)
30 ns
35 ns
40 ns
EDO
CYCLE
(tHPC)
(MIN)
25 ns
30 ns
35 ns
description
The TMS44409 is a high-speed 4194304-bit
dynamic random-access memory (DRAM) orga-
nized as 1048576 words of four bits each. This
device features maximum RAS access times of
60 ns, 70 ns and 80 ns. Maximum power
consumption is as low as 385 mW operating and
6 mW standby. All inputs and outputs, including
clocks, are compatible with Series 74 TTL. All addresses and data-in lines are latched on chip to simplify system
design. Data out is unlatched to allow greater system flexibility.
The TMS44409P is a high-speed, low-power, self-refresh version of the TMS44409 DRAM.
All versions of the TMS44409/P are offered in a 300-mil 20/26 J-lead plastic surface-mount SOJ package (DJ
suffix) and a 20/26-lead plastic small outline package (DGA suffix). These devices are characterized for
operation from 0
°
C to 70
°
C.
ADVANCE INFORMATION concerns new products in the sampling or
preproduction phase of development. Characteristic data and other
specifications are subject to change without notice.
A
26
25
24
23
22
18
17
16
15
14
1
2
3
4
5
9
10
11
12
13
V
SS
DQ4
DQ3
CAS
OE
A8
A7
A6
A5
A4
DQ1
DQ2
W
RAS
A9
A0
A1
A2
A3
V
CC
26
25
24
23
22
18
17
16
15
14
1
2
3
4
5
9
10
11
12
13
V
SS
DQ4
DQ3
CAS
OE
A8
A7
A6
A5
A4
DQ1
DQ2
W
RAS
A9
A0
A1
A2
A3
V
CC
PIN NOMENCLATURE
A0–A9
CAS
DQ1 – DQ4
OE
RAS
VCC
VSS
W
Address Inputs
Column-Address Strobe
Data In/Data Out
Output Enable
Row-Address Strobe
5-V Supply
Ground
Write Enable
DJ PACKAGE
(TOP VIEW)
DGA PACKAGE
(TOP VIEW)
Copyright
1995, Texas Instruments Incorporated
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