CY7C1046BV33 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – 1M x 4 Static RAM

046B V33
PRELIMINARY
CY7C1046BV33
1M x 4 Static RAM
Features
• High speed
— t_AA = 10 ns
• Low active power for 10 ns speed
— 540 mW (max.)
• Low CMOS standby power (L version)
— 1.8 mW (max.)
• 2.0V Data Retention (400 µW at 2.0V retention)
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE and OE features
Functional Description
The CY7C1046BV33 is a high-performance CMOS static
RAM organized as 1,048,576 words by 4 bits. Easy memory
Logic Block Diagram
expansion is provided by an active LOW Chip Enable (CE), an
active LOW Output Enable (OE), and three-state drivers. Writ-
ing to the device is accomplished by taking Chip Enable (CE)
and Write Enable (WE) inputs LOW. Data on the four I/O pins
(I/O₀ through I/O₃) is then written into the location specified on
the address pins (A₀ through A₁₉).
Reading from the device is accomplished by taking Chip
Enable (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 four input/output pins (I/O₀ through I/O₃) 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 CY7C1046BV33 is available in a standard 400-mil-wide
32-pin SOJ package with center power and ground (revolution-
ary) pinout.
Pin Configuration
SOJ
Top View
A₀
A₁
A₂
A₃
A₄
A₅
A₆
A₇
A₈
A₉
A₁₀
CE
WE
OE
INPUT BUFFER
1M x 4
ARRAY
COLUMN
DECODER
POWER
DOWN
I/O₀
I/O₁
I/O₂
I/O₃
1046BV33–1
A₀ 1
A_{1 2}
A₂ 3
A₃ 4
A_{4 5}
CE ₆
I/O_{0 7}
V_CC 8
GND 9
I/O₁ 10
WE 11
A₅ 12
A₆ 13
A₇ 14
A_{8 15}
A_{9 16}
32 _A19
31 _A18
30 _A17
29 _A16
28 _A15
27 _OE
26 _I/O3
25 _GND
24 _VCC
23 _I/O2
22 A₁₄
21 A₁₃
20 A₁₂
19 _A11
18 A₁₀
17 NC
1046BV33–2
Selection Guide
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum CMOS Standby
Current (mA)
Shaded areas contain advance information.
Com’l
L version
7C1046BV33-10 7C1046BV33-12
10
12
150
140
8
8
0.5
0.5
7C1046BV33-15
15
130
8
0.5
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-05170 Rev. **
Revised September 21, 2001