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TMS416409A, TMS417409A, TMS426409A, TMS427409A
4194304 BY 4-BIT EXTENDED DATA OUT
DYNAMIC RANDOM-ACCESS MEMORIES
SMKS893B – AUGUST 1996 – REVISED APRIL 1997
This data sheet is applicable to all
TMS41x409As and TMS42x409As symbolized
by Revision “B”, Revision “E”, and subsequent
revisions as described in the device
symbolization section.
D Organization . . . 4 194304 × 4 D Single Power Supply (5 V or 3.3 V) D Performance Ranges:
’41x409A-50 ’41x409A-60
ACCESS ACCESS ACCESS
TIME TIME TIME
tRAC MAX
tCAC MAX
tAA MAX
50 ns 13 ns 25 ns
60 ns 15 ns 30 ns
EDO CYCLE tHPC
MIN
20 ns
25 ns
’41x409A-70 ’42x409A-50
70 ns 50 ns
18 ns 13 ns
35 ns 25 ns
30 ns 20 ns
’42x409A-60
60 ns 15 ns 30 ns
25 ns
’42x409A-70
70 ns 18 ns 35 ns
30 ns
D Extended-Data-Out (EDO) Operation
D CAS-Before-RAS ( CBR) Refresh
D Low Power Dissipation
D 3-State Unlatched Output
D High-Reliability Plastic 24 / 26-Lead
300-Mil-Wide Surface-Mount Small-Outline
J-Lead (SOJ) Package (DJ Suffix) and 24/26-Lead 300-Mil-Wide Surface-Mount Thin Small-Outline Package (TSOP)
(DGA Suffix)
D Operating Free-Air Temperature Range
0°C to 70°C
description
The TMS41x409A and TMS42x409A series are 16 777 216-bit dynamic random-access memory (DRAM) devices organized as 4 194 304 words of four bits each.
These devices feature maximum RAS access times of 50, 60, and 70 ns. All address and data-in lines are latched on chip to simplify system design. Data out is unlatched to allow greater system flexibility.
DJ/DGA PACKAGES ( TOP VIEW )
VCC DQ1
DQ2
W
RAS A11†
1 2 3 4 5 6
26 VSS 25 DQ4 24 DQ3 23 CAS 22 OE
21 A9
A10 A0 A1 A2 A3
VCC
8 9 10 11 12 13
19 A8 18 A7 17 A6 16 A5 15 A4 14 VSS
PIN NOMENCLATURE
A0 – A11†
DQ1 – DQ4
CAS
NC
OE
RAS
VCC VSS W
Address Inputs Data In / Data Out Column-Address Strobe No Internal Connection Output Enable Row-Address Strobe 5-V or 3.3-V Supply‡ Ground Write Enable
† A11 is NC for TMS417409A and TMS427409A. ‡ See Available Options Table
DEVICE
TMS416409A TMS417409A TMS426409A TMS427409A
AVAILABLE OPTIONS
POWER SUPPLY
SELF REFRESH, BATTERY BACKUP
5V –
5V –
3.3 V
–
3.3 V
–
REFRESH CYCLES
4 096 in 64 ms 2 048 in 32 ms 4 096 in 64 ms 2 048 in 32 ms
The TMS416409A and TMS417409A are offered in a 24 / 26-lead plastic surface-mount SOJ package (DJ suffix). The TMS426409A and TMS427409A are offered in a 24/26-lead plastic surface-mount SOJ package (DJ suffix) and a 24 / 26-lead plastic surface-mount TSOP (DGA suffix). These packages are designed for operation from 0°C to 70°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
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