CY7C1049BNV33 Datasheet, PDF (1/8 Pages) Cypress Semiconductor – 512K x 8 Static RAM

CY7C1049BNV33
512K x 8 Static RAM
Features
• High speed
— t_AA = 12 ns
• Low active power
— 504 mW (max.)
• Low CMOS standby power (Commercial L version)
— 1.8 mW (max.)
• 2.0V Data Retention (660 µW at 2.0V retention)
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE and OE features
Logic Block Diagram
I/O₀
INPUTBUFFER
A₀
A₁
I/O₁
A₂
A₃
I/O₂
A₄
A₅
A₆
A₇
512K x 8
ARRAY
A₈
I/O₃
I/O₄
A₉
A₁₀
I/O₅
CE
COLUMN
DECODER
POWER
DOWN
I/O₆
WE
I/O₇
OE
Functional Description^[1]
The CY7C1049BNV33 is a high-performance CMOS Static
RAM organized as 524,288 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.
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
specified on the address pins (A₀ through A₁₈).
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 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 CY7C1049BNV33 is available in a standard 400-mil-wide
36-pin SOJ and 44-pin TSOPII packages with center power
and ground (revolutionary) pinout.
Pin Configuration
SOJ
Top View
TSOP
Top View
A₀ 1
A_{1 2}
A₂ 3
A₃ 4
A_{4 5}
CE ₆
I/O_{0 7}
I/O₁ 8
V_CC 9
GND 10
I/O₂ 11
I/O3 12
WE 13
A₅ 14
A₆ 15
A₇ 16
A_{8 17}
A_{9 18}
36 _NC
NC 1
35 _A18
34 _A17
33 _A16
32 A₁₅
31 _OE
NC 2
A₀ 3
A₁ 4
A₂ 5
A₃ 6
A₄ 7
30 _I/O7 CE 8
29 _I/O6 ^I/O0 9
28
27
26
GND
V_CC
I/O₅
I/O₁
V_CC
V_SS
I/O₂
10
11
12
13
25 I/O_{4 I/O3 14}
24 A₁₄
23 A₁₃
22 A₁₂
21 _A11
20 A₁₀
WE 15
A₅ 16
A₆ ¹⁷
A₇ 18
A₈ 19
A₉ 20
19 NC
NC 21
NC 22
44 _NC
43 NC
42 NC
41 A₁₈
40 A₁₇
39 _A16
38 _A15
37 _OE
36 _I/O7
35 _I/O6
34 _VSS
33 _VCC
32 I/O₅
31 I/O₄
30 A₁₄
29 A₁₃
28 A₁₂
27 A₁₁
26 ^A10
25 NC
24 ^NC
23 ^NC
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document #: 001-06432 Rev. **
Revised February 1, 2006
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