T221160A Datasheet, PDF (1/14 Pages) Taiwan Memory Technology – 64K x 16 DYNAMIC RAM FAST PAGE MODE

tm TE
CH
DRAM
T221160A
64K x 16 DYNAMIC RAM
FAST PAGE MODE
FEATURES
• High speed access time : 25/30/35/40 ns
• Industry-standard x 16 pinouts and timing
functions.
• Single 5V (±10%) power supply.
• All device pins are TTL- compatible.
• 256-cycle refresh in 4ms.
• Refresh modes: RAS only, CAS BEFORE
RAS (CBR) and HIDDEN.
• Conventional FAST PAGE MODE access cycle.
• BYTE WRITE and BYTE READ access cycles.
PART NUMBER EXAMPLES
PART NUMBER ACCESS TIME PACKAGE
T221160A-30J
30ns
SOJ
T221160A-30S
30ns
T221160A-35J
35ns
T221160A-35S
35ns
TSOP-II
SOJ
TSOP-II
GENERAL DESCRIPTION
The T221160A is a randomly accessed solid state
memory containing 1,048,551 bits organized in a
x16 configuration. The T221160A has both BYTE
WRITE and WORD WRITE access cycles via two
CAS pins. It offers Fast Page mode operation
The T221160A CAS function and timing are
determined by the first CAS to transition low and
by the last to transition back high. Use only one of
the two CAS and leave the other staying high
during WRITE will result in a BYTE WRITE.
CASL transiting low in a WRITE cycle will write
data into the lower byte (IO1~IO8), and CASH
transiting low will write data into the upper byte
(IO9~16).
PIN ASSIGNMENT ( Top View )
Vcc
1
I/01
2
I/02
3
I/03
4
I/04
5
Vcc
6
I/05
7
I/06
8
I/07
9
I/08
10
SOJ
NC
11
NC
12
WE
13
RAS 14
NC
15
A0
16
A1
17
A2
18
A3
19
Vcc
20
40
Vss
39
I/016
38
I/015
37
I/014
36
I/013
35
Vss
34
I/012
33
I/011
32
I/010
31
I/09
30
NC
29
CASL
28
CASH
27
OE
26
NC
25
A7
24
A6
23
A5
22
A4
21
VSS
Vcc
1
I/01
2
I/02
3
I/03
4
I/04
5
Vcc
6
I/05
7
I/06
8
I/07
9
I/08
10
NC
11
NC
12
WE
13
RAS
14
NC
15
A0
16
A1
17
A2
18
A3
19
Vcc
20
T S O P (II)
40
V ss
39
I/016
38
I/015
37
I/014
36
I/013
35
V ss
34
I/012
33
I/011
32
I/010
31
I/09
30
NC
29
CASL
28
CASH
27
OE
26
NC
25
A7
24
A6
23
A5
22
A4
21
VSS
Taiwan Memory Technology, Inc. reserves the right P. 1
to change products or specifications without notice.
Publication Date: FEB. 2002
Revision:A