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TMS44409P Datasheet

  • TMS44409P

  • 1048576-WORD BY 4-BIT DYNAMIC RANDOM-ACCESS MEMORY

  • 26頁

  • TI

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TMS44409, TMS44409P
1048576-WORD BY 4-BIT
DYNAMIC RANDOM-ACCESS MEMORY
SMHS563 鈥?JULY1995
D
D
D
Organization . . . 1 048 576
脳
4
Single 5-V Power Supply (鹵10% Tolerance)
Performance Ranges:
ACCESS
TIME
(tRAC)
(MAX)
鈥?4409 / P-60 60 ns
鈥?4409 / P-70 70 ns
鈥?4409 / P-80 80 ns
ACCESS
TIME
(tCAC)
(MAX)
15 ns
18 ns
20 ns
ACCESS
TIME
(tAA)
(MAX)
30 ns
35 ns
40 ns
EDO
CYCLE
(tHPC)
(MIN)
25 ns
30 ns
35 ns
DJ PACKAGE
( TOP VIEW )
DGA PACKAGE
( TOP VIEW )
DQ1
DQ2
W
RAS
A9
1
2
3
4
5
26
25
24
23
22
V
SS
DQ4
DQ3
CAS
OE
DQ1
DQ2
W
RAS
A9
1
2
3
4
5
26
25
24
23
22
V
SS
DQ4
DQ3
CAS
OE
D
D
D
D
D
D
D
PIN NOMENCLATURE
A0 鈥?A9
CAS
DQ1 鈥?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
description
The TMS44409 is a high-speed 4 194 304-bit
dynamic random-access memory (DRAM) orga-
nized as 1 048 576 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擄C to 70擄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.
Copyright
漏
1995, Texas Instruments Incorporated
POST OFFICE BOX 1443
鈥?/div>
HOUSTON, TEXAS 77251鈥?443
1
ADVANCE INFORMATION
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
鈥?1 024 Cycle Refresh in 16 ns (max)
鈥?128 ms on Low Power, Self-Refresh
Version (TMS44409P Only)
Operating Free-Air Temperature Range
0擄C to 70擄C
A0
A1
A2
A3
V
CC
9
10
11
12
13
18
17
16
15
14
A8
A7
A6
A5
A4
A0
A1
A2
A3
V
CC
9
10
11
12
13
18
17
16
15
14
A8
A7
A6
A5
A4

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