Cypress CY7C1353B-40AC 256kx18 flow-through sram with nobl architecture Datasheet

353B
CY7C1353B
PRELIMINARY
256Kx18 Flow-Through SRAM with NoBL™ Architecture
Features
Functional Description
• Pin compatible and functionally equivalent to ZBT™
devices MCM63Z819 and MT55L256L18F
• Supports 117-MHz bus operations with zero wait states
— Data is transferred on every clock
• Internally self-timed output buffer control to eliminate
the need to use OE
• Registered inputs for flow-through operation
• Byte Write capability
• 256K x 18 common I/O architecture
• Single 3.3V power supply
• Fast clock-to-output times
— 7.5 ns (for 117- MHz device)
— 8.5 ns (for 100-MHz device)
— 11.0 ns (for 66-MHz device)
— 12. 0 ns (for 50-MHz device)
— 14.0 ns (for 40-MHz device)
• Clock Enable (CEN) pin to suspend operation
• Synchronous self-timed writes
• Asynchronous Output Enable
• JEDEC-standard 100 TQFP package
• Burst Capability—linear or interleaved burst order
• Low standby power
The CY7C1353B is a 3.3V, 256K by 18 Synchronous
Flow-Through Burst SRAM designed specifically to support
unlimited true back-to-back Read/Write operations without the
insertion of wait states. The CY7C1353B is equipped with the
advanced No Bus Latency™ (NoBL™) logic required to enable consecutive Read/Write operations with data being transferred on every clock cycle. This feature dramatically improves
the throughput of data through the SRAM, especially in systems that require frequent Write-Read transitions. The
CY7C1353B is pin/functionally compatible to ZBT SRAMs
MCM63Z819 and MT55L256L18F.
All synchronous inputs pass through input registers controlled
by the rising edge of the clock. The clock input is qualified by
the Clock Enable (CEN) signal, which when deasserted suspends operation and extends the previous clock cycle. Maximum access delay from the clock rise is 7.5 ns (117-MHz device).
Write operations are controlled by the four Byte Write Select
(BWS[1:0]) and a Write Enable (WE) input. All writes are conducted with on-chip synchronous self-timed write circuitry.
Three synchronous Chip Enables (CE1, CE2, CE3) and an
asynchronous Output Enable (OE) provide for easy bank selection and output three-state control. In order to avoid bus
contention, the output drivers are synchronously three-stated
during the data portion of a write sequence.
Logic Block Diagram
CLK
CE
ADV/LD
A[17:0]
18
D
Data-In REG.
Q
18
18
CEN
CE1
CE 2
CE 3
WE
BWS [1:0]
Mode
CONTROL
and WRITE
LOGIC
18
256KX18
MEMORY
ARRAY
18
DQ[15:0]
DP[1:0]
OE
Selection Guide
7C1353B-117
7C1353B-100
Maximum Access Time (ns)
7.5
8.5
11.0
12.0
14.0
Maximum Operating Current (mA) Commercial
375
350
250
200
175
5
5
5
5
5
Maximum CMOS Standby
Current (mA)
Commercial
7C1353B-66 7C1353B-50 7C1353B-40
NoBL and No Bus Latency are trademarks of Cypress Semiconductor Corporation.
ZBT is a trademark of Integrated Device Technology.
Cypress Semiconductor Corporation
Document #: 38-05266 Rev. **
•
3901 North First Street
•
San Jose
•
CA 95134 • 408-943-2600
Revised March 13, 2002
PRELIMINARY
CY7C1353B
Pin Configurations
A7
CE1
CE2
NC
NC
BWS1
BWS0
CE3
VDD
VSS
CLK
WE
CEN
OE
ADV/LD
NC
NC
A8
A9
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
A6
99
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
47
48
49
50
A13
A14
A15
A16
VDD
46
41
VSS
45
40
DNU
A12
39
DNU
A11
38
A0
44
37
A1
A10
36
A2
43
35
DNU
34
A3
DNU
33
A4
Document #: 38-05266 Rev. **
42
32
A5
CY7C1353B
31
VDDQ
VSS
NC
NC
DQ8
DQ9
VSS
VDDQ
DQ10
DQ11
VSS
VDD
VDD
VSS
DQ12
DQ13
VDDQ
VSS
DQ14
DQ15
DP1
NC
VSS
VDDQ
NC
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
MODE
NC
NC
NC
100
100-Pin TQFP
A17
NC
NC
VDDQ
VSS
NC
DP0
DQ7
DQ6
VSS
VDDQ
DQ5
DQ4
VSS
VSS
VDD
VSS
DQ3
DQ2
VDDQ
VSS
DQ1
DQ0
NC
NC
VSS
VDDQ
NC
NC
NC
Page 2 of 15
PRELIMINARY
CY7C1353B
Pin Configurations (continued)
119-Ball BGA
1
2
3
4
5
6
7
A
VDDQ
A
A
ADSP
A
A
VDDQ
B
C
NC
NC
CE2
A
A
A
ADSC
VDD
A
A
CE3
A
NC
NC
D
DQc
DQPc
VSS
NC
VSS
DQPb
DQb
E
F
DQc
VDDQ
DQc
DQc
VSS
VSS
CE1
OE
VSS
VSS
DQb
DQb
DQb
VDDQ
G
H
J
DQc
DQc
VDDQ
DQc
DQc
VDD
BWc
VSS
NC
ADV
GW
VDD
BWb
VSS
NC
DQb
DQb
VDD
DQb
DQb
VDDQ
K
DQd
DQd
VSS
CLK
VSS
DQa
DQa
L
DQd
DQd
BWd
NC
BWa
DQa
DQa
M
N
VDDQ
DQd
DQd
DQd
VSS
VSS
BWE
A1
VSS
VSS
DQa
DQa
VDDQ
DQa
P
DQd
DQPd
VSS
A0
VSS
DQPa
DQa
R
T
NC
NC
A
NC
MODE
A
VDD
A
VDD
A
A
NC
NC
ZZ
U
VDDQ
TMS
TDI
TCK
TDO
NC
VDDQ
ó
Introduction
Pin Definitions
Pin Number
80, 50−44,
81−82, 99–
100, 32−37
94, 93
Name
A[17:0]
I/O
InputSynchronous
Description
Address Inputs used to select one of the 262,144 address locations. Sampled at
the rising edge of the CLK.
BWS[1:0]
InputSynchronous
88
WE
85
ADV/LD
InputSynchronous
InputSynchronous
89
CLK
Input-Clock
98
CE1
97
CE2
92
CE3
InputSynchronous
InputSynchronous
InputSynchronous
Byte Write Select Inputs, active LOW. Qualified with WE to conduct writes to the
SRAM. Sampled on the rising edge of CLK. BWS0 controls DQ[7:0] and DP0, BWS1
controls DQ[15:8] and DP1. See Write Cycle Description table for details.
Write Enable Input, active LOW. Sampled on the rising edge of CLK if CEN is active
LOW. This signal must be asserted LOW to initiate a write sequence.
Advance/Load Input used to advance the on-chip address counter or load a new
address. When HIGH (and CEN is asserted LOW) the internal burst counter is
advanced. When LOW, a new address can be loaded into the device for an access.
After being deselected, ADV/LD should be driven LOW in order to load a new
address.
Clock Input. Used to capture all synchronous inputs to the device. CLK is qualified
with CEN. CLK is only recognized if CEN is active LOW.
Chip Enable 1 Input, active LOW. Sampled on the rising edge of CLK. Used in
conjunction with CE2, and CE3 to select/deselect the device.
Chip Enable 2 Input, active HIGH. Sampled on the rising edge of CLK. Used in
conjunction with CE1 and CE3 to select/deselect the device.
Chip Enable 3 Input, active LOW. Sampled on the rising edge of CLK. Used in
conjunction with CE and CE2 to select/deselect the device.
Document #: 38-05266 Rev. **
Page 3 of 15
PRELIMINARY
CY7C1353B
Pin Definitions (continued)
Pin Number
86
Name
OE
I/O
InputAsynchronous
87
CEN
InputSynchronous
23−22,
DQ[15:0]
19−18,
13−12, 9−8,
73−72,
69−68,
63−62, 59−58
I/OSynchronous
24, 74
DP[1:0]
I/OSynchronous
31
Mode
Input
Strap pin
15, 16, 41, 65,
91
4, 11, 20, 27,
54, 61, 70, 77
5, 10, 14, 17,
21, 26, 40, 55,
60, 64,
66−67, 71,
76, 90
1−3, 6−7, 25,
28−30,51−53,
56−57, 75,
78−79, 95−96
83, 84
VDD
Power Supply
VDDQ
I/O Power
Supply
Ground
VSS
Description
Output Enable, active LOW. Combined with the synchronous logic block inside the
device to control the direction of the I/O pins. When LOW, the I/O pins are allowed
to behave as outputs. When deasserted HIGH, I/O pins are three-stated, and act
as input data pins. OE is masked during the data portion of a write sequence,
during the first clock when emerging from a deselected state, when the device has
been deselected.
Clock Enable Input, active LOW. When asserted LOW the Clock signal is recognized by the SRAM. When deasserted HIGH the Clock signal is masked. Since
deasserting CEN does not deselect the device, CEN can be used to extend the
previous cycle when required.
Bidirectional Data I/O Lines. As inputs, they feed into an on-chip data register that
is triggered by the rising edge of CLK. As outputs, they deliver the data contained
in the memory location specified by A[17:0] during the previous clock rise of the
read cycle. The direction of the pins is controlled by OE and the internal control
logic. When OE is asserted LOW, the pins can behave as outputs. When HIGH,
DQ[15:0] are placed in a three-state condition. The outputs are automatically
three-stated during the data portion of a write sequence, during the first clock when
emerging from a deselected state, and when the device is deselected, regardless
of the state of OE.
Bidirectional Data Parity I/O Lines. Functionally, these signals are identical to
DQ[15:0]. During write sequences, DP0 is controlled by BWS0 and DP1 is controlled
by BWS1.
Mode Input. Selects the burst order of the device. Tied HIGH selects the interleaved
burst order. Pulled LOW selects the linear burst order. MODE should not change
states during operation. When left floating MODE will default HIGH, to an interleaved burst order.
Power supply inputs to the core of the device. Should be connected to 3.3V power
supply.
Power supply for the I/O circuitry. Should be connected to a 3.3V power supply.
Ground for the device. Should be connected to ground of the system.
NC
-
No Connects. These pins are not connected to the internal device.
NC
-
No Connects. Reserved for address inputs for depth expansion. Pin 83 will be used
for 512K depth and pin 84 will be used for 1-Mb depth.
Do Not Use Pins. These pins should be left floating or tied to VSS.
38, 39, 42, 43 DNU
-
Functional Overview
The CY7C1353B is a synchronous flow-through burst SRAM
designed specifically to eliminate wait states during
Write-Read transitions. All synchronous inputs pass through
input registers controlled by the rising edge of the clock. The
clock signal is qualified with the Clock Enable input signal
(CEN). If CEN is HIGH, the clock signal is not recognized and
all internal states are maintained. All synchronous operations
are qualified with CEN. Maximum access delay from the clock
rise (tCDV) is 7.5 ns (117-MHz device).
Accesses can be initiated by asserting all three Chip Enables
(CE1, CE2, CE3) active at the rising edge of the clock. If Clock
Enable (CEN) is active LOW and ADV/LD is asserted LOW, the
address presented to the device will be latched. The access
can either be a read or write operation, depending on the staDocument #: 38-05266 Rev. **
tus of the Write Enable (WE). BWS[1:0] can be used to conduct
byte write operations.
Write operations are qualified by the Write Enable (WE). All
writes are simplified with on-chip synchronous self-timed write
circuitry.
Three synchronous Chip Enables (CE1, CE2, CE3) and an
asynchronous Output Enable (OE) simplify depth expansion.
All operations (Reads, Writes, and Deselects) are pipelined.
ADV/LD should be driven LOW once the device has been deselected in order to load a new address for the next operation.
Single Read Accesses
A read access is initiated when the following conditions are
satisfied at clock rise: (1) CEN is asserted LOW, (2) CE1, CE2,
Page 4 of 15
PRELIMINARY
and CE3 are ALL asserted active, (3) the Write Enable input
signal WE is deasserted HIGH, and 4) ADV/LD is asserted
LOW. The address presented to the address inputs (A[17:0]) is
latched into the Address Register and presented to the memory core and control logic. The control logic determines that a
read access is in progress and allows the requested data to
propagate to the output buffers. The data is available within 7.5
ns (117-MHz device) provided OE is active LOW. After the first
clock of the read access the output buffers are controlled by
OE and the internal control logic. OE must be driven LOW in
order for the device to drive out the requested data. On the
subsequent clock, another operation (Read/Write/Deselect)
can be initiated. When the SRAM is deselected at clock rise
by one of the chip enable signals, its output will be three-stated
immediately.
Burst Read Accesses
The CY7C1353B has an on-chip burst counter that allows the
user the ability to supply a single address and conduct up to
four Reads without reasserting the address inputs. ADV/LD
must be driven LOW in order to load a new address into the
SRAM, as described in the Single Read Access section above.
The sequence of the burst counter is determined by the MODE
input signal. A LOW input on MODE selects a linear burst
mode, a HIGH selects an interleaved burst sequence. Both
burst counters use A0 and A1 in the burst sequence, and will
wrap around when incremented sufficiently. A HIGH input on
ADV/LD will increment the internal burst counter regardless of
the state of chip enable inputs or WE. WE is latched at the
beginning of a burst cycle. Therefore, the type of access (Read
or Write) is maintained throughout the burst sequence.
Single Write Accesses
Write access are initiated when the following conditions are
satisfied at clock rise: (1) CEN is asserted LOW, (2) CE1, CE2,
and CE3 are ALL asserted active, and (3) the write signal WE
is asserted LOW. The address presented to A[17:0] is loaded
into the Address Register. The write signals are latched into
the Control Logic block. The data lines are automatically
Document #: 38-05266 Rev. **
CY7C1353B
three-stated regardless of the state of the OE input signal. This
allows the external logic to present the data on DQ[15:0] and
DP[1:0].
On the next clock rise the data presented to DQ[15:0] and
DP[1:0] (or a subset for byte write operations, see Write Cycle
Description table for details) inputs is latched into the device
and the write is complete. Additional accesses
(Read/Write/Deselect) can be initiated on this cycle.
The data written during the Write operation is controlled by
BWS[1:0] signals. The CY7C1353B provides byte write capability that is described in the Write Cycle Description table.
Asserting the Write Enable input (WE) with the selected Byte
Write Select (BWS[1:0]) input will selectively write to only the
desired bytes. Bytes not selected during a byte write operation
will remain unaltered. A synchronous self-timed write mechanism has been provided to simplify the write operations. Byte
write capability has been included in order to greatly simplify
Read/Modify/Write sequences, which can be reduced to simple byte write operations.
Because the CY7C1353B is a common I/O device, data should
not be driven into the device while the outputs are active. The
Output Enable (OE) can be deasserted HIGH before presenting data to the DQ[15:0] and DP[1:0] inputs. Doing so will
three-state the output drivers. As a safety precaution, DQ[15:0]
and DP[1:0].are automatically three-stated during the data portion of a write cycle, regardless of the state of OE.
Burst Write Accesses
The CY7C1353B has an on-chip burst counter that allows the
user the ability to supply a single address and conduct up to
four Write operations without reasserting the address inputs.
ADV/LD must be driven LOW in order to load the initial address, as described in the Single Write Access section above.
When ADV/LD is driven HIGH on the subsequent clock rise,
the Chip Enables (CE1, CE2, and CE3) and WE inputs are
ignored and the burst counter is incremented. The correct
BWS[1:0] inputs must be driven in each cycle of the burst write
in order to write the correct bytes of data.
Page 5 of 15
PRELIMINARY
CY7C1353B
Cycle Description Truth Table[1, 2, 3, 4, 5, 6]
Address
used
Operation
Deselected
CE
CEN
ADV/
LD
WE
BWSx
1
0
L
X
X
L-H
I/Os three-state following next recognized clock.
X
1
X
X
X
L-H
Clock Ignored, all operations suspended.
External
Suspend
-
CLK
Comments
Begin Read
External
0
0
0
1
X
L-H
Address Latched.
Begin Write
External
0
0
0
0
Valid
L-H
Address Latched, data presented
two valid clocks later.
Burst READ
Operation
Internal
X
0
1
X
X
L-H
Burst Read Operation. Previous
access was a Read operation. Addresses incremented internally in
conjunction with the state of Mode.
Burst WRITE
Operation
Internal
X
0
1
X
Valid
L-H
Burst Write Operation. Previous
access was a Write operation. Addresses incremented internally in
conjunction with the state of Mode.
Bytes written are determined by
BWS[1:0].
Interleaved Burst Sequence
First
Address
Second
Address
Third
Address
Linear Burst Sequence
Fourth
Address
First
Address
Second
Address
Third
Address
Fourth
Address
Ax+1, Ax
Ax+1, Ax
Ax+1, Ax
Ax+1, Ax
Ax+1, Ax
Ax+1, Ax
Ax+1, Ax
Ax+1, Ax
00
01
10
11
00
01
10
11
01
00
11
10
01
10
11
00
10
11
00
01
10
11
00
01
11
10
01
00
11
00
01
10
Write Cycle Description[1, 2]
Function
WE
BWS1
BWS0
Read
1
X
X
Write - No bytes written
0
1
1
Write Byte 0 - (DQ[7:0] and DP0)
0
1
0
Write Byte 1 - (DQ[15:8] and DP1)
0
0
1
Write All Bytes
0
0
0
Notes:
1. X = “Don't Care,” 1 = Logic HIGH, 0 = Logic LOW, CE stands for ALL Chip Enables active. BWSx = 0 signifies at least one Byte Write Select is active, BWSx
= Valid signifies that the desired byte write selects are asserted, see Write Cycle Description table for details.
2. Write is defined by WE and BWS[1:0]. See Write Cycle Description table for details.
3. The DQ and DP pins are controlled by the current cycle and the OE signal.
4. CEN=1 inserts wait states.
5. Device will power-up deselected and the I/Os in a three-state condition, regardless of OE.
6. OE assumed LOW.
Document #: 38-05266 Rev. **
Page 6 of 15
PRELIMINARY
CY7C1353B
Maximum Ratings
Current into Outputs (LOW) ........................................ 20 mA
Static Discharge Voltage .......................................... >2001V
(per MIL-STD-883, Method 3015)
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ..................................... −65°C to +150°C
Latch-Up Current.................................................... >200 mA
Ambient Temperature with
Power Applied.................................................. −55°C to +125°C
Operating Range
Supply Voltage on VDD Relative to GND......... −0.5V to +4.6V
Range
DC Voltage Applied to Outputs
in High Z State[7] ..................................... −0.5V to VDDQ + 0.5V
Com’l
Ambient
Temperature[8]
VDD/VDDQ
0°C to +70°C
3.3V ±5%
DC Input Voltage[7] .................................. −0.5V to VDDQ + 0.5V
Electrical Characteristics Over the Operating Range
Parameter
Description
Test Conditions
VDD
Power Supply Voltage
VDDQ
I/O Supply Voltage
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
IX
Input Load Current
[9]
VDD = Min., IOH = –4.0 mA
Unit
V
3.135
3.465
V
2.4
VDD = Min., IOL = 8.0 mA
0.4
V
VDD +0.3V
V
−0.3
0.8
V
−5
5
mA
−30
30
mA
−5
5
mA
8.5-ns cycle, 117 MHz
375
mA
10-ns cycle, 100 MHz
350
mA
15-ns cycle, 66 MHz
250
mA
20-ns cycle, 50 MHz
200
mA
25-ns cycle, 40 MHz
175
mA
8.5-ns cycle, 117 MHz
90
mA
10-ns cycle, 100 MHz
80
mA
15-ns cycle, 66 MHz
60
mA
20-ns cycle, 50 MHz
40
mA
25-ns cycle, 40 MHz
30
mA
GND ≤ VI ≤ VDDQ
Input Current of MODE
Output Leakage
Current
GND ≤ VI ≤ VDDQ, Output Disabled
ICC
VDD Operating Supply
VDD = Max., IOUT = 0 mA,
f = fMAX = 1/tCYC
Max. VDD, Device Deselected,
VIN ≥ VIH or VIN ≤ VIL
f = fMAX = 1/tCYC
V
2.0
[7]
Automatic CE
Power-Down
Current—TTL Inputs
Max.
3.465
[9]
IOZ
ISB1
Min.
3.135
ISB2
Automatic CE
Power-Down
Current—CMOS
Inputs
Max. VDD, Device Deselected,
VIN ≤ 0.3V or VIN > VDDQ − 0.3V,
f=0
All speed grades
5
mA
ISB3
Automatic CE
Power-Down
Current—CMOS
Inputs
Max. VDD, Device Deselected, or
VIN ≤ 0.3V or VIN > VDDQ − 0.3V
f = fMAX = 1/tCYC
8.5-ns cycle, 117 MHz
80
mA
10-ns cycle, 100 MHz
70
mA
15-ns cycle, 66 MHz
50
mA
20-ns cycle, 50 MHz
40
mA
25-ns cycle, 40 MHz
30
mA
Notes:
7. Minimum voltage equals −2.0V for pulse duration less than 20 ns.
8. TA is the case temperature.
9. The load used for VOH and VOL testing is shown in figure (b) of the AC Test Loads.
Document #: 38-05266 Rev. **
Page 7 of 15
PRELIMINARY
CY7C1353B
Capacitance[10]
Parameter
Description
Test Conditions
CIN
Input Capacitance
TA = 25°C, f = 1 MHz,
VDD = 3.3V
VDDQ = 3.3V
CCLK
Clock Input Capacitance
CI/O
Input/Output Capacitance
Max.
Unit
4
pF
4
pF
4
pF
AC Test Loads and Waveforms
R=317Ω
3.3V
OUTPUT
OUTPUT
Z0 =50Ω
RL =50Ω
VL = 1.5V
(a)
ALL INPUT PULSES
[11]
3.0V
5 pF
INCLUDING
JIG AND
SCOPE
R=351Ω
GND
(b)
Thermal Resistance
Description
Thermal Resistance
(Junction to Ambient)
Test Conditions
Still Air, soldered on a 4.25 x 1.125 inch,
4-layer printed circuit board.
Thermal Resistance
(Junction to Case)
Symbol
TQFP Typ.
Units
Notes
ΘJA
28
°C/W
10
ΘJC
4
°C/W
10
Notes:
10. Tested initially and after any design or process change that may affect these parameters.
11. Unless otherwise noted, test conditions assume signal transition time of 2 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output
loading shown in (a) of AC Test Loads.
Document #: 38-05266 Rev. **
Page 8 of 15
PRELIMINARY
CY7C1353B
Switching Characteristics Over the Operating Range[11, 12, 13]
-117
Parameter
Description
Min.
Max.
Min.
Max.
Min.
-50
Max.
Max.
Max. Unit
Maximum Operating Frequency
tCH
Clock HIGH
1.9
1.9
5.0
6.0
7.0
ns
tCL
Clock LOW
1.9
1.9
5.0
6.0
7.0
ns
tAS
Address Set-Up Before CLK Rise
2.0
2.0
2.0
2.0
2.5
ns
tAH
Address Hold After CLK Rise
0.5
0.5
0.5
1.0
1.0
ns
tCDV
Data Output Valid After CLK Rise
tDOH
Data Output Hold After CLK Rise
1.5
1.5
1.5
1.5
1.5
ns
tCENS
CEN Set-Up Before CLK Rise
2.0
2.0
2.0
2.0
2.5
ns
tCENH
CEN Hold After CLK Rise
0.5
0.5
0.5
1.0
1.0
ns
tWES
WE, BWS[1:0] Set-Up Before CLK
Rise
2.0
2.0
2.0
2.0
2.5
ns
tWEH
WE, BWS[1:0] Hold After CLK Rise
0.5
0.5
0.5
1.0
1.0
ns
tALS
ADV/LD Set-Up Before CLK Rise
2.0
2.0
2.0
2.0
2.5
ns
tALH
ADV/LD Hold after CLK Rise
0.5
0.5
0.5
1.0
1.0
ns
tDS
Data Input Set-Up Before CLK Rise
2.0
2.0
2.0
2.0
2.5
ns
tDH
Data Input Hold After CLK Rise
0.5
0.5
0.5
1.0
1.0
ns
tCES
Chip Select Set-Up
2.0
2.0
2.0
2.0
2.5
ns
tCEH
Chip Select Hold After CLK Rise
0.5
0.5
0.5
1.0
1.0
ns
tCLZ
Clock to Low-Z
7.5
[10, 12, 13, 14]
1.5
[10, 12, 13, 14]
3.0
[10, 12,
tEOHZ
OE HIGH to Output High-Z
tEOLZ
OE LOW to Output Low-Z[10, 12, 13,
tEOV
OE LOW to Output Valid[12]
4.2
1.5
5.0
3.0
0
1.5
5.0
5.0
1.5
5.0
6.0
14.0
1.5
5.0
3.0
7.0
0
6.0
ns
40
12.0
3.0
0
5.0
25.0
50
11
3.0
0
4.2
66
8.5
4.2
13, 14]
14]
100
20.0
Min.
FMAX
117
15.0
Min.
-40
Clock Cycle Time
Clock to High-Z
10
-66
tCYC
tCHZ
8.5
-100
ns
ns
ns
8.0
0
7.0
MHz
ns
ns
8.0
ns
Note:
12. tCHZ, tCLZ, tOEV, tEOLZ, and tEOHZ are specified with AC test conditions shown in part (a) of AC Test Loads. Transition is measured ± 200 mV from steady-state
voltage.
13. At any given voltage and temperature, tEOHZ is less than tEOLZ and tCHZ is less than tCLZ to eliminate bus contention between SRAMs when sharing the same
data bus. These specifications do not imply a bus contention condition, but reflect parameters guaranteed over worst case user conditions. Device is designed
to achieve High-Z prior to Low-Z under the same system conditions.
14. This parameter is sampled and not 100% tested.
Document #: 38-05266 Rev. **
Page 9 of 15
PRELIMINARY
CY7C1353B
Switching Waveforms
DESELECT
DESELECT
Suspend
Read
Read
Write
Read
DESELECT
Read
Read
Write
Read/Write Waveforms
CLK
tCENH
tCENS
tCH tCL
tCENH
tCENS
tCYC
CEN
tAS
ADDRESS
WA2
RA1
RA3
RA4
WA5
RA6
RA7
D5
In
Q6
Out
tAH
WE
tWS tWH
tCES
tCEH
CE
tCLZ
DataIn/Out
Device
originally
deselected
tCHZ
tDOH
Q1
Out
tDOH
tCHZ
D2
In
Q3
Out
Q4
Out
Q7
Out
tCDV
WE is the combination of WE & BWSx to define a Write Cycle (see Write Cycle Description table).
CE is the combination of CE1, CE2, and CE3. All Chip Selects need to be active in order to select
the device. Any Chip Select can deselect the device. RAx stands for Read Address X, WAx stands for
Write Address X, Dx stands for Data-in X, Qx stands for Data-out X.
= DON’T CARE
Document #: 38-05266 Rev. **
= UNDEFINED
Page 10 of 15
PRELIMINARY
CY7C1353B
Burst Read
Burst Read
Begin Read
Burst Write
Burst Write
Burst Write
Begin Write
Burst Read
Burst Read
Burst Read
Burst Sequences
Begin Read
Switching Waveforms
CLK
tALH
tALS
tCH tCL
tCYC
ADV/LD
tAS tAH
ADDRESS
RA1
WA2
RA3
WE
tWS tWH
tWS tWH
BWS[1:0]
tCES tCEH
CE
tCLZ
tCHZ
tDOH
DataIn/Out
tCDV
Device
originally deselected
Q11a
Out
Q1+1
Out
Q1+2
Out
Q1+3
Out
tCDV
tCLZ
tDH
D2
In
D2+1
In
D2+2
In
D2+3
In
Q3
Out
Q3+1
Out
tDS
The combination of WE & BWS[1:0] defines a write cycle (see Write Cycle Description table).
CE is the combination of CE1, CE2, and CE3. All Chip Enables need to be active in order to select
the device. Any Chip Enable can deselect the device. RAx stands for Read Address X, WAx stands for
Write Address X, Dx stands for Data-in for location X, Qx stands for Data-out for location X. CEN held
LOW. During burst writes, byte writes can be conducted by asserting the appropriate BWS[1:0] input signals.
Burst order determined by the state of the MODE input. CEN held LOW. OE held LOW.
= DON’T CARE
Document #: 38-05266 Rev. **
= UNDEFINED
Page 11 of 15
PRELIMINARY
CY7C1353B
Switching Waveforms
OE Timing
OE
tEOV
tEOHZ
I/O’s
Three-state
tEOLZ
Ordering Information
Speed
(MHz)
Ordering Code
Package
Name
Package Type
Operating
Range
117
CY7C1353B-117AC
A101
100-Lead 14 x 20 x 1.4 mm Thin Quad Flat Pack
Commercial
100
CY7C1353B-100AC
A101
100-Lead 14 x 20 x 1.4 mm Thin Quad Flat Pack
Commercial
66
CY7C1353B-66AC
A101
100-Lead 14 x 20 x 1.4 mm Thin Quad Flat Pack
Commercial
119-Lead FBGA (14 x 22 x 2.4 mm)
Commercial
100-Lead 14 x 20 x 1.4 mm Thin Quad Flat Pack
Commercial
119-Lead FBGA (14 x 22 x 2.4 mm)
Commercial
100-Lead 14 x 20 x 1.4 mm Thin Quad Flat Pack
Commercial
CY7C1353B-66BGC
50
CY7C1353B-50AC
CY7C1353B-50BGC
40
CY7C1353B-40AC
BG119
A101
BG119
A101
Shaded areas contain advance information.
Document #: 38-05266 Rev. **
Page 12 of 15
PRELIMINARY
CY7C1353B
Package Diagrams
100-Pin Thin Plastic Quad Flatpack (14 x 20 x 1.4 mm) A101
51-85050-A
Document #: 38-05266 Rev. **
Page 13 of 15
PRELIMINARY
CY7C1353B
Package Diagrams (continued)
119-Lead PBGA (14 x 22 x 2.4 mm) BG119
51-85115-*A
Document #: 38-05266 Rev. **
Page 14 of 15
© Cypress Semiconductor Corporation, 2002. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize
its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.
PRELIMINARY
CY7C1353B
Document Title: CY7C1353B 256Kx18 Flow-Through SRAM with NoBL™ Architecture
Document Number: 38-05266
REV.
ECN NO.
Issue
Date
Orig. of
Change
**
114137
03/18/02
DSG
Document #: 38-05266 Rev. **
Description of Change
Change from Spec number: 38-00950 to 38-05266
Page 15 of 15