CY7C1019 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – 128K x 8 Static RAM

019
PRELIMINARY
CY7C1019
Features
• High speed
— t_AA = 10 ns
• CMOS for optimum speed/power
• Center power/ground pinout
• Automatic power-down when deselected
• Easy memory expansion with CE and OE options
Functional Description
The CY7C1019 is a high-performance CMOS static RAM or-
ganized as 131,072 words by 8 bits. Easy memory expansion
is provided by an active LOW chip enable (CE), an active LOW
output enable (OE), and three-state drivers. This device has
an automatic power-down feature that significantly reduces
power consumption when deselected.
Logic Block Diagram
128K x 8 Static RAM
Writing to the device is accomplished by taking chip enable
(CE) and write enable (WE) inputs LOW. Data on the eight I/O
pins (I/O₀ through I/O₇) is then written into the location speci-
fied on the address pins (A₀ through A₁₆).
Reading from the device is accomplished by taking chip en-
able (CE) and output enable (OE) LOW while forcing write
enable (WE) HIGH. Under these conditions, the contents of
the memory location specified by the address pins will appear
on the I/O pins.
The eight input/output pins (I/O₀ through I/O₇) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), or during a write
operation (CE LOW, and WE LOW).
The CY7C1019 is available in standard 400-mil-wide SOJs.
Pin Configuration
INPUT BUFFER
A₀
A₁
A₂
A₃
A₄
A₅
A₆
512 x 256 x 8
ARRAY
A₇
A₈
COLUMN
CE
DECODER
WE
OE
Selection Guide
POWER
DOWN
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum Standby Current (mA)
Shaded areas contain advance information.
I/O₀
I/O₁
I/O₂
I/O₃
I/O₄
I/O₅
I/O₆
I/O₇
1019–1
SOJ
Top View
A₀ 1
A_{1 2}
A₂ 3
A_{3 4}
CE 5
I/O₀ 6
I/O₁ 7
V_CC 8
V_{SS 9}
I/O₂ 10
I/O_{3 11}
WE 12
A_{4 13}
A_{5 14}
A_{6 15}
A₇ 16
32 A16
31 A₁₅
30 A₁₄
29 A13
28 _OE
27 _I/O7
26 _I/O6
25 _VSS
24 _VCC
23 I/O₅
22 I/O₄
21 A12
20 ^A11
19 ^A10
18 ^A9
17 A8
1019–2
7C1019–10
10
240
L
210
10
L
1
7C1019–12
12
220
190
10
1
7C1019–15
15
200
175
10
1
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-05055 Rev. **
Revised August 31, 2001