IDT71342SA データシートの表示（PDF） - Integrated Device Technology
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IDT71342SA Datasheet PDF : 14 Pages
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IDT71342SA/LA
High-Speed 4K x 8 Dual-Port Static RAM with Semaphore
Industrial and Commercial Temperature Ranges
Description
The IDT71342 is a high-speed 4K x 8 Dual-Port Static RAM with full
on-chip hardware support of semaphore signalling between the two
ports.
The IDT71342 provides two independent ports with separate
control, address, and I/O pins that permit independent, asynchronous
access for reads or writes to any location in memory. To assist in
arbitrating between ports, a fully independent semaphore logic block
is provided. This block contains unassigned flags which can be
accessed by either side; however, only one side can control the flag at any
time. An automatic power down feature, controlled by CE and SEM,
permits the on-chip circuitry of each port to enter a very low standby power
mode (both CE and SEM HIGH).
Fabricated using IDT’s CMOS high-performance technology, this
device typically operates on only 700mW of power. Low-power (LA)
versions offer battery backup data retention capability, with each port
typically consuming 200µW from a 2V battery. The device is packaged
in either a 64-pin TQFP or a 52-pin PLCC.
Pin Configurations(1,2,3)
INDEX
A1L
A2L
A3L
A4L
A5L
A6L
A7L
A8L
A9L
I/O0L
I/O1L
I/O2L
I/O3L
7 6 5 4 3 2 52 51 50 49 48 47
8
1
46
9
45
10
44
11
43
12
42
IDT71342J
13
J52-1(4)
41
14
52-Pin PLCC
40
15
Top View(5)
39
16
38
17
37
18
36
19
35
20
34
21 22 23 24 25 26 27 28 29 30 31 32 33
OER
A0R
A1R
A2R
A3R
A4R
A5R
A6R
A7R
A8R
A9R
N/C
I/O7R
2721 drw 02
NOTES:
1. All Vcc pins must be connected to power supply.
2. All GND pins must be connected to ground supply.
3. J52 package body is approximately .79 in x .79 in x .17 in.
PN64 package body is approximately 14mm x 14mm x 1.4mm.
4. This package code is used to reference the package diagram.
5. This text does not indicate orientation of the actual part-marking.
INDEX
OEL
1
A0L
2
A1L
3
A2L
4
A3L
5
A4L
6
A5L
7
A6L
8
N/C
9
A7L 10
A8L
11
A9L
12
N/C 13
I/O0L 14
I/O1L 15
I/O2L
16
6.242
71342PF
PN64-1(4)
64-Pin TQFP
Top View(5)
48 OER
47 A0R
46 A1R
45 A2R
44 A3R
43 A4R
42 A5R
41 A6R
40 N/C
39 A7R
38 A8R
37 A9R
36 N/C
35 N/C
34 I/O7R
33 I/O6R
2721 drw 03
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