IS42S16128
128K Words x 16 Bits x 2 Banks (4-MBIT)
SYNCHRONOUS DYNAMIC RAM
FEATURES
• Clock frequency: 125 MHz, 100 MHz, 83 MHz
• Two banks can be operated simultaneously and
independently
• Single 3.3V power supply
• LVTTL interface
• Programmable burst length
– (1, 2, 4, 8, full page)
• Programmable burst sequence:
Sequential/Interleave
• Auto refresh, self refresh
• 1K refresh cycles every 16 ms
• Random column address every clock cycle
• Programmable
CAS
latency (2, 3 clocks)
• Burst read/write and burst read/single write
operations capability
• Byte controlled by LDQM and UDQM
• Package 400-mil 50-pin TSOP II
ISSI
DESCRIPTION
PIN DESCRIPTIONS
A0-A9
A0-A8
A9
A0-A7
I/O0 to I/O15
CLK
CKE
CS
RAS
CAS
WE
LDQM
UDQM
Address Input
Row Address Input
Bank Select Address
Column Address Input
Data I/O
System Clock Input
Clock Enable
Chip Select
Row Address Strobe Command
Column Address Strobe Command
Write Enable
Lower Bye, Input/Output Mask
Upper Bye, Input/Output Mask
Power
Ground
Power Supply for I/O Pin
Ground for I/O Pin
No Connection
®
FEBRUARY 2000
ISSI's 4Mb Synchronous DRAM IS42S16128 is organized as
a 131072-word x 16-bit x 2-bank for improved performance.
The synchronous DRAMs achieve high-speed data transfer
using pipeline architecture. All inputs and outputs signals refer
to the rising edge of the clock input.
PIN CONFIGURATIONS
50-Pin TSOP (Type II)
VCC
I/O0
I/O1
GNDQ
I/O2
I/O3
VCCQ
I/O4
I/O5
GNDQ
I/O6
I/O7
VCCQ
LDQM
WE
CAS
RAS
CS
A9
A8
A0
A1
A2
A3
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
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
GND
I/O15
I/O14
GNDQ
I/O13
I/O12
VCCQ
I/O11
I/O10
GNDQ
I/O9
I/O8
VCCQ
NC
UDQM
CLK
CKE
NC
NC
NC
A7
A6
A5
A4
GND
Vcc
GND
VccQ
GNDQ
NC
ORDERING INFORMATION
Commercial Range: 0⋅C to 70⋅C
⋅
⋅
Frequency
125 MHz
100 MHz
83 MHz
Speed (ns)
8
10
12
Order Part No.
IS42S16128-8T
IS42S16128-10T
IS42S16128-12T
Package
400-mil TSOP II
400-mil TSOP II
400-mil TSOP II
ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any
errors which may appear in this publication. © Copyright 2000, Integrated Silicon Solution, Inc.
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. A
03/13/00
1
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
