SMJ626162
524288 BY 16-BIT BY 2-BANK
SYNCHRONOUS DYNAMIC RANDOM-ACCESS MEMORY
SGMS737C – JULY 1997 – REVISED MARCH 1999
HKD PACKAGE
(TOP VIEW)
Organization
512K × 16 Bits × 2 Banks
3.3-V Power Supply (±5% Tolerance)
1
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
V
V
SS
DQ15
DQ14
CC
Two Banks for On-Chip Interleaving
(Gapless Accesses)
2
DQ0
DQ1
3
High Bandwidth – Up to 83-MHz Data Rates
4
V
V
SSQ
DQ13
DQ12
SSQ
DQ2
Read Latency Programmable to
2 or 3 Cycles From Column-Address Entry
5
6
DQ3
7
Burst Sequence Programmable to Serial or
Interleave
V
V
CCQ
DQ11
DQ10
CCQ
DQ4
8
9
DQ5
Burst Length Programmable to 1, 2, 4, 8, or
256 (Full Page)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
V
V
SSQ
DQ9
DQ8
SSQ
DQ6
Chip Select and Clock Enable for Enhanced
System Interfacing
DQ7
V
V
CCQ
CCQ
DQML
Cycle-by-Cycle DQ-Bus Mask Capability
With Upper- and Lower-Byte Control
NC
DQMU
CLK
CKE
NC
A9
W
CAS
RAS
CS
Autorefresh Capability
4K Refresh (Total for Both Banks)
High-Speed, Low-Noise, Low-Voltage TTL
(LVTTL) Interface
A11
A10
A0
Power-Down Mode
A8
Pipeline Architecture
A7
Temperature Ranges:
A1
A6
Operating, – 55°C to 125°C
Storage, – 65°C to 150°C
A2
A5
A3
A4
Performance Ranges:
V
V
SS
CC
SYNCHRONOUS ACCESS TIME REFRESH
CLOCK CYCLE
TIME
CLOCK TO
OUTPUT
TIME
INTERVAL
PIN NOMENCLATURE
t
t
t
REF
CK
AC
(MIN)
(MIN)
8ns
9ns
10ns
(MAX)
32ms
32ms
32ms
A[0:10]
Address Inputs
’626162-12
’626162-15
12 ns
15 ns
20 ns
A0–A10 Row Addresses
A0–A7 Column Addresses
A10 Automatic-Precharge Select
Bank Select
’626162-20
Read latency = 3
†
A11
CAS
CKE
Column-Address Strobe
Clock Enable
description
CLK
System Clock
CS
Chip Select
The SMJ626162 series of devices are
16777216-bit synchronous dynamic random-
access memory (SDRAM) devices organized as
two banks of 524288 words with 16 bits per word.
DQ[0:15]
DQML, DQMU
NC
SDRAM Data Input/Data Output
Data-Input/Data-Output Mask Enable
No Connect
Row-Address Strobe
Power Supply (3.3-V Typical)
Power Supply for Output Drivers
(3.3-V Typical)
RAS
V
V
CC
CCQ
All inputs and outputs of the SMJ626162 series
are compatible with the LVTTL interface.
V
V
W
Ground
Ground for Output Drivers
Write Enable
SS
SSQ
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.
Copyright 1999, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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.
1
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