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CY7C1446AV33-250BGXC Datasheet(PDF) 9 Page - Cypress Semiconductor

Part # CY7C1446AV33-250BGXC
Description  36-Mbit (1M x 36/2M x 18/512K x 72) Pipelined Sync SRAM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1446AV33-250BGXC Datasheet(HTML) 9 Page - Cypress Semiconductor

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CY7C1440AV33
CY7C1442AV33
CY7C1446AV33
Document #: 38-05383 Rev. *E
Page 9 of 31
Interleaved Burst Address Table
(MODE = Floating or VDD)
First
Address
A1: A0
Second
Address
A1: A0
Third
Address
A1: A0
Fourth
Address
A1: A0
00
01
10
11
01
00
11
10
10
11
00
01
11
10
01
00
Linear Burst Address Table (MODE = GND)
First
Address
A1: A0
Second
Address
A1: A0
Third
Address
A1: A0
Fourth
Address
A1: A0
00
01
10
11
01
10
11
00
10
11
00
01
11
00
01
10
ZZ Mode Electrical Characteristics
Parameter
Description
Test Conditions
Min.
Max.
Unit
IDDZZ
Sleep mode standby current
ZZ > VDD – 0.2V
100
mA
tZZS
Device operation to ZZ
ZZ > VDD – 0.2V
2tCYC
ns
tZZREC
ZZ recovery time
ZZ < 0.2V
2tCYC
ns
tZZI
ZZ Active to sleep current
This parameter is sampled
2tCYC
ns
tRZZI
ZZ Inactive to exit sleep current
This parameter is sampled
0
ns
Truth Table [2, 3, 4, 5, 6, 7]
Operation
Add. Used
CE1
CE2 CE3 ZZ ADSP ADSC
ADV
WRITE
OE CLK
DQ
Deselect Cycle, Power Down
None
H
X
X
L
X
L
X
X
X
L-H
Tri-State
Deselect Cycle, Power Down
None
L
L
X
L
L
X
X
X
X
L-H
Tri-State
Deselect Cycle, Power Down
None
L
X
H
L
L
X
X
X
X
L-H
Tri-State
Deselect Cycle, Power Down
None
L
L
X
L
H
L
X
X
X
L-H
Tri-State
Deselect Cycle, Power Down
None
L
X
H
L
H
L
X
X
X
L-H
Tri-State
Sleep Mode, Power Down
None
X
X
X
H
X
X
X
X
X
X
Tri-State
READ Cycle, Begin Burst
External
L
H
L
L
L
X
X
X
L
L-H
Q
READ Cycle, Begin Burst
External
L
H
L
L
L
X
X
X
H
L-H
Tri-State
WRITE Cycle, Begin Burst
External
L
H
L
L
H
L
X
L
X
L-H
D
READ Cycle, Begin Burst
External
L
H
L
L
H
L
X
H
L
L-H
Q
READ Cycle, Begin Burst
External
L
H
L
L
H
L
X
H
H
L-H
Tri-State
READ Cycle, Continue Burst
Next
X
X
X
L
H
H
L
H
L
L-H
Q
READ Cycle, Continue Burst
Next
X
X
X
L
H
H
L
H
H
L-H
Tri-State
READ Cycle, Continue Burst
Next
H
X
X
L
X
H
L
H
L
L-H
Q
READ Cycle, Continue Burst
Next
H
X
X
L
X
H
L
H
H
L-H
Tri-State
WRITE Cycle, Continue Burst
Next
X
X
X
L
H
H
L
L
X
L-H
D
WRITE Cycle, Continue Burst
Next
H
X
X
L
X
H
L
L
X
L-H
D
READ Cycle, Suspend Burst
Current
X
X
X
L
H
H
H
H
L
L-H
Q
Notes:
2. X = “Don't Care.” H = Logic HIGH, L = Logic LOW.
3. WRITE = L when any one or more Byte Write enable signals and BWE = L or GW = L. WRITE = H when all Byte write enable signals, BWE, GW = H.
4. The DQ pins are controlled by the current cycle and the OE signal. OE is asynchronous and is not sampled with the clock.
5. CE1, CE2, and CE3 are available only in the TQFP package. BGA package has only 2 chip selects CE1 and CE2.
6. The SRAM always initiates a read cycle when ADSP is asserted, regardless of the state of GW, BWE, or BWX. Writes may occur only on subsequent clocks
after the ADSP or with the assertion of ADSC. As a result, OE must be driven HIGH prior to the start of the write cycle to allow the outputs to tri-state. OE is a
don't care for the remainder of the write cycle.
7. OE is asynchronous and is not sampled with the clock rise. It is masked internally during write cycles. During a read cycle all data bits are Tri-State when OE is
inactive or when the device is deselected, and all data bits behave as output when OE is active (LOW).
[+] Feedback
[+] Feedback


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