IDT71V321/71V421S/L
High Speed 3.3V 2K x 8 Dual-Port Static RAM with Interrupts
Industrial and Commercial Temperature Ranges
Description
The IDT71V321/IDT71V421 are high-speed 2K x 8 Dual-Port down feature, controlled by CE, permits the on chip circuitry of each
port to enter a very low standby power mode.
Static RAMs with internal interrupt logic for interprocessor communica-
tions. The IDT71V321 is designed to be used as a stand-alone 8-bit
Dual-Port RAM or as a "MASTER" Dual-Port RAM together with the
IDT71V421 "SLAVE" Dual-Port in 16-or-more-bit memory system ap-
plications results in full speed, error-free operation without the need for
additional discrete logic.
The device 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. An automatic power
Fabricated using IDT's CMOS high-performance technology, these
devices typically operate on only 325mW of power. Low-power (L)
versions offer battery backup data retention capability, with each Dual-
Port typically consuming 200µW from a 2V battery.
The IDT71V321/IDT71V421 devices are packaged in a 52-pin
PLCC, a 64-pin TQFP (thin quad flatpack), and a 64-pin STQFP
(super thin quad flatpack).
PinConfigurations(1,2,3)
INDEX
7 6 5 4 3 2
52 51 50 49 48 47
46
OER
1L
2L
3L
4L
5L
6L
7L
8L
9L
0L
1L
2L
3L
A
8
9
1
0R
A
A
45
44
43
42
41
40
39
38
37
36
35
34
1R
A
A
10
11
12
13
14
15
16
17
18
2R
A
A
3R
A
A
IDT71V321/421J
J52-1(4)
4R
A
A
5R
A
A
52-Pin PLCC
Top View(5)
6R
A
A
7R
A
A
8R
I/O
I/O
I/O
I/O
A
9R
A
NC
19
20
7R
I/O
21 22 23 24 25 26 27 28 29 30 31 32 33
,
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INDEX
OER
A0R
A1R
A2R
A3R
A4R
A5R
A6R
N/C
A7R
A8R
A9R
N/C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
OEL
A0L
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
A1L
A2L
A3L
A4L
A5L
A6L
N/C
A7L
A8L
IDT71V321/421PF or TF
PP64-1(4)
&
PN64-1(4)
64-Pin STQFP
64-Pin TQFP
Top View(5)
A
9L
N/C
I/O0L
I/O1L
N/C
I/O7R
I/O6R
NOTES:
1. All VCC pins must be connected to power supply.
2. All GND pins must be connected to ground supply.
2L
I/O
3. J52-1 package body is approximately .75 in x .75 in x .17 in.
PP64-1 package body is approximately 10mm x 10mm x 1.4mm.
PN64-1 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.
3026 drw 03
2
6.42
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
