CY7C106B Datasheet, PDF (1/10 Pages) Cypress Semiconductor – 256K x 4 Static RAM

1CY7C1006B
CY7C106B
CY7C1006B
Features
• High speed
— t_AA = 12 ns
• CMOS for optimum speed/power
• Low active power
— 495 mW
• Low standby power
— 275 mW
• 2.0V data retention (optional)
— 100 µW
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
Functional Description
The CY7C106B and CY7C1006B are high-performance
CMOS static RAMs organized as 262,144 words by 4 bits.
Easy memory expansion is provided by an active LOW Chip
256K x 4 Static RAM
Enable (CE), an active LOW Output Enable (OE), and
three-state drivers. These devices have an automatic pow-
er-down feature that reduces power consumption by more
than 65% when the devices are deselected.
Writing to the devices 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 speci-
fied on the address pins (A₀ through A₁₇).
Reading from the devices 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 four I/O pins.
The four input/output pins (I/O₀ through I/O₃) are placed in a
high-impedance state when the devices are deselected (CE
HIGH), the outputs are disabled (OE HIGH), or during a write
operation (CE and WE LOW).
The CY7C106B is available in a standard 400-mil-wide SOJ;
the CY7C1006B is available in a standard 300-mil-wide SOJ.
Logic Block Diagram
INPUT BUFFER
A₁
A₂
A₃
A₄
A₅
512 x 512 x 4
A₆
ARRAY
A₇
A₈
A₉
Pin Configuration
I/O₃
I/O₂
I/O₁
I/O₀
SOJ
Top View
A₀ 1
A₁ 2
A₂ 3
A₃ 4
A₄ 5
A₅ 6
A_{6 7}
A₇ 8
A₈ 9
A₉ 10
A₁₀ 11
CE ¹²
OE ¹³
GND ¹⁴
28 _VCC
27 _A17
26 _A16
25
24
23
22
A₁₅
A₁₄
A₁₃
A₁₂
21 _A11
20 _NC
19 _I/O3
18
17
16
I/O₂
I/O₁
I/O₀
15 _WE
C106B–2
COLUMN
DECODER
POWER
DOWN
Selection Guide
Maximum Access Time (ns)
Maximum Operating
Current (mA)
Maximum Standby
Current (mA)
7C106B-12
7C1006B-12
12
90
50
CE
WE
OE
C106B–1
7C106B-15
7C1006B-15
15
80
30
7C106B-20
7C1006B-20
20
75
30
7C106B-25
7C1006B-25
25
70
30
7C106B-35
35
60
25
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-05037 Rev. **
Revised August 24, 2001