CYPRESS CY7C1214F

CY7C1214F
1-Mb (32K x 32) Flow-Through Sync SRAM
Features
• 32K X 32 common I/O
• 3.3V –5% and +10% core power supply (VDD)
• 3.3V I/O supply (VDDQ)
• Fast clock-to-output times
— 7.5 ns (117-MHz version)
— 8.5 ns (100-MHz version)
• Provide high-performance 2-1-1-1 access rate
• User-selectable burst counter supporting Intel
Pentium interleaved or linear burst sequences
• Separate processor and controller address strobes
• Synchronous self-timed write
• Asynchronous output enable
• Supports 3.3V I/O level
• Offered in JEDEC-standard 100-pin TQFP package
• “ZZ” Sleep Mode option
Functional Description[1]
The CY7C1214F is a 32,768 x 32 synchronous cache RAM
designed to interface with high-speed microprocessors with
minimum glue logic. Maximum access delay from clock rise is
7.5 ns (117-MHz version). A 2-bit on-chip counter captures the
first address in a burst and increments the address automatically for the rest of the burst access. All synchronous inputs
are gated by registers controlled by a positive-edge-triggered
Clock Input (CLK). The synchronous inputs include all
addresses, all data inputs, address-pipelining Chip Enable
(CE1), depth-expansion Chip Enables (CE2 and CE3), Burst
Control inputs (ADSC, ADSP, and ADV), Write Enables
(BW[A:D], and BWE), and Global Write (GW). Asynchronous
inputs include the Output Enable (OE) and the ZZ pin.
The CY7C1214F allows either interleaved or linear burst
sequences, selected by the MODE input pin. A HIGH selects
an interleaved burst sequence, while a LOW selects a linear
burst sequence. Burst accesses can be initiated with the
Processor Address Strobe (ADSP) or the cache Controller
Address Strobe (ADSC) inputs. Address advancement is
controlled by the Address Advancement (ADV) input.
Addresses and chip enables are registered at rising edge of
clock when either Address Strobe Processor (ADSP) or
Address Strobe Controller (ADSC) are active. Subsequent
burst addresses can be internally generated as controlled by
the Advance pin (ADV).
The CY7C1214F operates from a +3.3V core power supply
while all outputs may operate with a +3.3V supply. All inputs
and outputs are JEDEC-standard JESD8-5-compatible.
Logic Block Diagram
ADDRESS
REGISTER
A0, A1, A
A[1:0]
MODE
BURST Q1
COUNTER
AND LOGIC
Q0
CLR
ADV
CLK
ADSC
ADSP
DQD
DQD
BWD
BYTE
BYTE
WRITE REGISTER
WRITE REGISTER
DQC
DQC
BWC
BYTE
BYTE
WRITE REGISTER
WRITE REGISTER
DQB
DQB
BWB
MEMORY
ARRAY
SENSE
AMPS
OUTPUT
BUFFERS
DQs
BYTE
BYTE
WRITE REGISTER
WRITE REGISTER
DQA
BWA
BWE
DQA
BYTE
BYTE
WRITE REGISTER
WRITE REGISTER
INPUT
REGISTERS
GW
ENABLE
REGISTER
CE1
CE2
CE3
OE
ZZ
SLEEP
CONTROL
Note:
1. For best-practices recommendations, please refer to the Cypress application note System Design Guidelines on www.cypress.com
Cypress Semiconductor Corporation
Document #: 38-05434 Rev. *A
•
3901 North First Street
•
San Jose, CA 95134
•
408-943-2600
Revised March 24, 2004
CY7C1214F
Selection Guide
117 MHz
100 MHz
Unit
Maximum Access Time
7.5
8.0
ns
Maximum Operating Current
220
205
mA
Maximum Standby Current
35
35
mA
Shaded area contain advance information. Please contact your local Cypress sales representative for availability of this part.
Pin Configurations
Document #: 38-05434 Rev. *A
A
A
81
82
83
84
BWE
OE
ADSC
ADSP
ADV
85
86
GW
89
87
CLK
91
88
VDD
VSS
93
90
BWA
CE3
94
92
BWC
BWB
95
CE2
BWD
96
98
97
A
CE1
99
35
36
37
38
39
40
41
42
45
46
47
48
49
50
A1
A0
NC
NC
VSS
VDD
NC
NC
A
A
A
A
A
NC
NC
44
34
A
43
A
31
VSSQ
VDDQ
DQD
DQD
NC
A
VSS
DQD
DQD
VDDQ
VSSQ
DQD
DQD
DQD
DQD
CY7C1214F
33
BYTE D
DQC
DQC
VSSQ
VDDQ
DQC
DQC
NC
VDD
NC
A
BYTE C
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
32
VDDQ
VSSQ
DQC
DQC
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
A
NC
DQC
DQC
100
100-Pin TQFP
NC
DQB
DQB
VDDQ
VSSQ
DQB
DQB
DQB
DQB
VSSQ
VDDQ
DQB
DQB
VSS
NC
BYTE B
VDD
ZZ
DQA
DQA
VDDQ
VSSQ
DQA
DQA
DQA
DQA
BYTE A
VSSQ
VDDQ
DQA
DQA
NC
Page 2 of 15
CY7C1214F
Pin Descriptions
Name
A0, A1, A
BWA,BWB
BWC,BWD
GW
TQFP
I/O
Description
InputAddress Inputs used to select one of the 32K address locations. Sampled at the
37,36,32,
33,34,35, Synchronous rising edge of the CLK if ADSP or ADSC is active LOW, and CE1, CE2, and CE3 are
44,45,46,
sampled active. A[1:0] feed the 2-bit counter.
47,48,81,
82,99,100
93,94,
95,96
InputByte Write Select Inputs, active LOW. Qualified with BWE to conduct Byte Writes
Synchronous to the SRAM. Sampled on the rising edge of CLK.
88
InputGlobal Write Enable Input, active LOW. When asserted LOW on the rising edge of
Synchronous CLK, a global write is conducted (ALL bytes are written, regardless of the values on
BW[A:D] and BWE).
BWE
87
InputByte Write Enable Input, active LOW. Sampled on the rising edge of CLK. This
Synchronous signal must be asserted LOW to conduct a Byte Write.
CLK
89
CE1
98
CE2
97
CE3
92
OE
86
ADV
83
InputAdvance Input signal, sampled on the rising edge of CLK. When asserted, it
Synchronous automatically increments the address in a burst cycle.
ADSP
84
ADSC
85
ZZ
64
InputAddress Strobe from Processor, sampled on the rising edge of CLK, active
Synchronous LOW. When asserted LOW, addresses presented to the device are captured in the
address registers. A[1:0] are also loaded into the burst counter. When ADSP and ADSC
are both asserted, only ADSP is recognized. ASDP is ignored when CE1 is deasserted
HIGH
InputAddress Strobe from Controller, sampled on the rising edge of CLK, active LOW.
Synchronous When asserted LOW, addresses presented to the device are captured in the address
registers. A[1:0] are also loaded into the burst counter. When ADSP and ADSC are
both asserted, only ADSP is recognized.
InputZZ “sleep” Input, active HIGH. When asserted HIGH places the device in a
Asynchronous non-time-critical “sleep” condition with data integrity preserved. For normal operation,
this pin has to be LOW or left floating. ZZ pin has an internal pull-down.
Input-Clock
Clock Input. Used to capture all synchronous inputs to the device. Also used to
increment the burst counter when ADV is asserted LOW, during a burst operation.
InputChip Enable 1 Input, active LOW. Sampled on the rising edge of CLK. Used in
Synchronous conjunction with CE2 and CE3 to select/deselect the device. ADSP is ignored if CE1
is HIGH.
InputChip Enable 2 Input, active HIGH. Sampled on the rising edge of CLK. Used in
Synchronous conjunction with CE1 and CE3 to select/deselect the device.
InputChip Enable 3 Input, active LOW. Sampled on the rising edge of CLK. Used in
Synchronous conjunction with CE and CE to select/deselect the device.
1
2
InputOutput Enable, asynchronous input, active LOW. Controls the direction of the I/O
Asynchronous pins. When LOW, the I/O pins behave as outputs. When deasserted HIGH, I/O pins
are three-stated, and act as input data pins. OE is masked during the first clock of a
Read cycle when emerging from a deselected state.
I/OBidirectional Data I/O lines. As inputs, they feed into an on-chip data register that
Synchronous is triggered by the rising edge of CLK. As outputs, they deliver the data contained in
the memory location specified by the addresses presented during the previous clock
rise of the read cycle. The direction of the pins is controlled by OE. When OE is
asserted LOW, the pins behave as outputs. When HIGH, DQs are placed in a
three-state condition.
DQs
52,53,56,
57,58,59,
62,63,68,
69,72,73,
74,75,78,
79,2,3,6,
7,8,9,12,
13,18,19,
22,23,24,
25,28,29,
VDD
15,41,
65, 91
Power
Supply
Power supply inputs to the core of the device.
VSS
17,40,
67,90
Ground
Ground for the core of the device.
Document #: 38-05434 Rev. *A
Page 3 of 15
CY7C1214F
Pin Descriptions (continued)
TQFP
I/O
VDDQ
Name
4,11,20,
27,54,61,
70,77,
I/O Power
Supply
Power supply for the I/O circuitry.
VSSQ
5,10,21,55
,60,71,76
I/O Ground
Ground for the I/O circuitry.
31
InputStatic
MODE
NC
1,14,16,30
,38,39,42,
43,49,50,
51,66,80
Description
Selects Burst Order. When tied to GND selects linear burst sequence. When tied to
VDD or left floating selects interleaved burst sequence. This is a strap pin and should
remain static during device operation. Mode Pin has an internal pull-up.
No Connects. Not Internally connected to the die.
Functional Overview
All synchronous inputs pass through input registers controlled
by the rising edge of the clock. Maximum access delay from
the clock rise (t CDV) is 7.5 ns (117-MHz device).
The CY7C1214F supports secondary cache in systems
utilizing either a linear or interleaved burst sequence. The
interleaved burst order supports Pentium and i486™
processors. The linear burst sequence is suited for processors
that utilize a linear burst sequence. The burst order is
user-selectable, and is determined by sampling the MODE
input. Accesses can be initiated with either the Processor
Address Strobe (ADSP) or the Controller Address Strobe
(ADSC). Address advancement through the burst sequence is
controlled by the ADV input. A two-bit on-chip wraparound
burst counter captures the first address in a burst sequence
and automatically increments the address for the rest of the
burst access.
Byte Write operations are qualified with the Byte Write Enable
(BWE) and Byte Write Select (BW[A:D]) inputs. A Global Write
Enable (GW) overrides all Byte Write inputs and writes data to
all four bytes. All Writes are simplified with on-chip
synchronous self-timed write circuitry.
Three synchronous Chip Selects (CE1, CE2, CE3) and an
asynchronous Output Enable (OE) provide for easy bank
selection and output three-state control. ADSP is ignored if
CE1 is HIGH.
Single Read Accesses
A single read access is initiated when the following conditions
are satisfied at clock rise: (1) CE1, CE2, and CE3 are all
asserted active, and (2) ADSP or ADSC is asserted LOW (if
the access is initiated by ADSC, the write inputs must be
deasserted during this first cycle). The address presented to
the address inputs is latched into the address register and the
burst counter/control logic and presented to the memory core.
If the OE input is asserted LOW, the requested data will be
available at the data outputs a maximum to tCDV after clock
rise. ADSP is ignored if CE1 is HIGH.
Single Write Accesses Initiated by ADSP
This access is initiated when the following conditions are
satisfied at clock rise: (1) CE1, CE2, CE3 are all asserted
active, and (2) ADSP is asserted LOW. The addresses
Document #: 38-05434 Rev. *A
presented are loaded into the address register and the burst
inputs (GW, BWE, and BW[A:D]) are ignored during this first
clock cycle. If the write inputs are asserted active (see Write
Cycle Descriptions table for appropriate states that indicate a
write) on the next clock rise, the appropriate data will be
latched and written into the device. Byte Writes are allowed.
During byte writes, BWA controls DQA and BWB controls
DQB, BWC controls DQC, and BWD controls DQD. All I/Os
are three-stated during a Byte Write. Since this is a common
I/O device, the asynchronous OE input signal must be
deasserted and the I/Os must be three-stated prior to the
presentation of data to DQs. As a safety precaution, the data
lines are three-stated once a Write cycle is detected,
regardless of the state of OE.
Single Write Accesses Initiated by ADSC
This write access is initiated when the following conditions are
satisfied at clock rise: (1) CE1, CE2, and CE3 are all asserted
active, (2) ADSC is asserted LOW, (3) ADSP is deasserted
HIGH, and (4) the Write input signals (GW, BWE, and
BW[A:D]) indicate a write access. ADSC is ignored if ADSP is
active LOW.
The addresses presented are loaded into the address register
and the burst counter/control logic and delivered to the
memory core. The information presented to DQs will be written
into the specified address location. Byte Writes are allowed.
During Byte Writes, BWA controls DQA, BWB controls DQB,
BWC controls DQC, and BWD controls DQD. All I/Os are
three-stated when a write is detected, even a byte write. Since
this is a common I/O device, the asynchronous OE input signal
must be deasserted and the I/Os must be three-stated prior to
the presentation of data to DQs. As a safety precaution, the
data lines are three-stated once a write cycle is detected,
regardless of the state of OE.
Burst Sequences
The CY7C1214F provides an on-chip two-bit wraparound
burst counter inside the SRAM. The burst counter is fed by
A[1:0], and can follow either a linear or interleaved burst order.
The burst order is determined by the state of the MODE input.
A LOW on MODE will select a linear burst sequence. A HIGH
on MODE will select an interleaved burst order. Leaving
MODE unconnected will cause the device to default to a interleaved burst sequence.
Page 4 of 15
CY7C1214F
Sleep Mode
Linear Burst Address Table (MODE = GND)
The ZZ input pin is an asynchronous input. Asserting ZZ
places the SRAM in a power conservation “sleep” mode. Two
clock cycles are required to enter into or exit from this “sleep”
mode. While in this mode, data integrity is guaranteed.
Accesses pending when entering the “sleep” mode are not
considered valid nor is the completion of the operation
guaranteed. The device must be deselected prior to entering
the “sleep” mode. CEs, ADSP, and ADSC must remain
inactive for the duration of tZZREC after the ZZ input returns
LOW.
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
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
ZZ Mode Electrical Characteristics
Parameter
Description
Test Conditions
IDDZZ
Snooze mode standby current
ZZ > VDD – 0.2V
Min.
tZZS
Device operation to ZZ
ZZ > VDD – 0.2V
tZZREC
ZZ Recovery time
ZZ < 0.2V
tZZI
ZZ Active to snooze current
This parameter is sampled
tRZZI
ZZ Inactive to exit snooze current
This parameter is sampled
Max.
Unit
40
mA
2tCYC
ns
2tCYC
ns
2tCYC
ns
0
ns
Truth Table [2, 3, 4, 5, 6]
Cycle Description
Address
Used
CE1 CE3 CE2 ZZ ADSP
ADSC
ADV WRITE
OE
CLK
DQ
Deselected Cycle,
Power-down
None
H
X
X
L
X
L
X
X
X
L-H Three-State
Deselected Cycle,
Power-down
None
L
X
L
L
L
X
X
X
X
L-H Three-State
Deselected Cycle,
Power-down
None
L
H
X
L
L
X
X
X
X
L-H Three-State
Deselected Cycle,
Power-down
None
L
X
L
L
H
L
X
X
X
L-H Three-State
Deselected Cycle,
Power-down
None
X
X
X
L
H
L
X
X
X
L-H Three-State
Snooze Mode, Power-down
None
X
X
X
H
X
X
X
X
X
X
Three-State
Read Cycle, Begin Burst
External
L
L
H
L
L
X
X
X
L
L-H Q
Read Cycle, Begin Burst
External
L
L
H
L
L
X
X
X
H
L-H Three-State
Write Cycle, Begin Burst
External
L
L
H
L
H
L
X
L
X
L-H D
Notes:
2. X = “Don't Care.” H = Logic HIGH, L = Logic LOW.
3. WRITE = L when any one or more Byte Write enable signals (BWA, BWB, BWC, BWD) and BWE = L or GW= L. WRITE = H when all Byte Write enable signals
(BWA, BWB, BWC, BWD), 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. The SRAM always initiates a read cycle when ADSP is asserted, regardless of the state of GW, BWE, or BW[A: D]. 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 three-state. OE is
a don't care for the remainder of the Write cycle
6. 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 three-state when OE
is inactive or when the device is deselected, and all data bits behave as output when OE is active (LOW)
Document #: 38-05434 Rev. *A
Page 5 of 15
CY7C1214F
Truth Table (continued)[2, 3, 4, 5, 6]
Cycle Description
Address
Used
CE1 CE3 CE2 ZZ ADSP
ADSC
ADV WRITE
OE
CLK
DQ
Read Cycle, Begin Burst
External
L
L
H
L
H
L
X
H
L
L-H Q
Read Cycle, Begin Burst
External
L
L
H
L
H
L
X
H
H
L-H Three-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 Three-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 Three-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
Read Cycle, Suspend Burst
Current
X
X
X
L
H
H
H
H
H
L-H Three-State
Read Cycle, Suspend Burst
Current
H
X
X
L
X
H
H
H
L
L-H Q
Read Cycle, Suspend Burst
Current
H
X
X
L
X
H
H
H
H
L-H Three-State
Write Cycle, Suspend Burst
Current
X
X
X
L
H
H
H
L
X
L-H D
Write Cycle, Suspend Burst
Current
H
X
X
L
X
H
H
L
X
L-H D
Truth Table for Read/Write[2, 3]
Function
Read
GW
H
BWE
H
BWD
X
BWC
X
BWB
X
BWA
X
Read
H
L
H
H
H
H
Write Byte (A, DQA)
H
L
H
H
H
L
Write Byte (B, DQB)
H
L
H
H
L
H
Write Byte (C, DQC)
H
L
H
L
H
H
Write Byte (D, DQD)
H
L
L
H
H
H
Write All Bytes
H
L
L
L
L
L
Write All Bytes
L
X
X
X
X
X
Document #: 38-05434 Rev. *A
Page 6 of 15
CY7C1214F
Maximum Ratings
Current into Outputs (LOW)......................................... 20 mA
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ................................. –65°C to +150°C
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
Static Discharge Voltage........................................... >2001V
(per MIL-STD-883, Method 3015)
Latch-up Current..................................................... >200 mA
Operating Range
Supply Voltage on VDD Relative to GND........ –0.5V to +4.6V
Range
Ambient
Temperature]
DC Voltage Applied to Outputs
in Three-State ..................................... –0.5V to VDDQ + 0.5V
Commercial
0°C to +70°C
VDD
VDDQ
3.3V
−5%/+10%
3.3V –5%
to VDD
DC Input Voltage....................................–0.5V to VDD + 0.5V
Electrical Characteristics Over the Operating Range [7, 8]
CY7C1214F
Parameter
Description
Test Conditions
Min.
Max.
Unit
3.135
3.6
V
3.135
3.6
V
VDD
Power Supply Voltage
VDDQ
I/O Supply Voltage
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
VDDQ = 3.3V, VDD = Min., IOL = 8.0 mA
0.4
V
VIH
Input HIGH Voltage
VDDQ = 3.3V
2.0
VDD + 0.3V
V
VDDQ = 3.3V
Voltage[7]
VDDQ = 3.3V, VDD = Min., IOH = –4.0 mA
2.4
V
VIL
Input LOW
–0.3
0.8
V
IX
Input Load Current
(except ZZ and MODE)
GND ≤ VI ≤ VDDQ
−5
5
µA
Input Current of MODE
Input = VSS
–30
Input Current of ZZ
Input = VSS
IOZ
Output Leakage Current
GND ≤ VI ≤ VDD, Output Disabled
Input = VDD
5
IOS
Output Short Circuit Current
VDD = Max., VOUT = GND
VDD Operating Supply Current
VDD = Max., IOUT = 0 mA,
f = fMAX= 1/tCYC
ISB1
Automatic CE Power-Down
Current—TTL Inputs
Max. VDD, Device Deselected,
VIN ≥ VIH or VIN ≤ VIL, f = fMAX,
inputs switching
ISB2
Automatic CE Power-Down
Current—CMOS Inputs
ISB3
ISB4
–5
µA
µA
–5
Input = VDD
IDD
µA
30
µA
5
µA
–300
mA
8.0-ns cycle, 117 MHz
220
mA
10-ns cycle, 100 MHz
205
mA
8.0-ns cycle, 117 MHz
85
mA
10-ns cycle, 100 MHz
80
mA
All speeds
Max. VDD, Device Deselected,
VIN ≥ VDD – 0.3V or VIN ≤ 0.3V,
f = 0, inputs static
35
mA
Automatic CE Power-Down
Current—CMOS Inputs
Max. VDD, Device Deselected,
8.0-ns cycle, 117 MHz
VIN ≥ VDDQ – 0.3V or VIN ≤ 0.3V, 10-ns cycle, 100 MHz
f = fMAX, inputs switching
70
mA
65
mA
Automatic CE Power-Down
Current—TTL Inputs
Max. VDD, Device Deselected,
VIN ≥ VDD – 0.3V or VIN ≤ 0.3V,
f = 0, inputs static
18
mA
All speeds
Notes:
7. Overshoot: VIH(AC) < VDDQ +1.5V (Pulse width less than tCYC/2), undershoot: VIL(AC) > –2V (Pulse width less than tCYC/2).
8. TPower-up: Assumes a linear ramp from 0v to VDD(min.) within 200 ms. During this time VIH < VDD and VDDQ < VDD.
Document #: 38-05434 Rev. *A
Page 7 of 15
CY7C1214F
Thermal Resistance[9]
Parameter
Description
ΘJA
Thermal Resistance
(Junction to Ambient)
ΘJC
Thermal Resistance
(Junction to Case)
Test Conditions
TQFP Package
Unit
41.83
°C/W
9.99
°C/W
Test conditions follow standard test methods
and procedures for measuring thermal
impedance, per EIA/JESD51
Capacitance[9]
Parameter
Description
Test Conditions
CIN
Input Capacitance
CCLK
Clock Input Capacitance
CI/O
Input/Output Capacitance
TA = 25°C, f = 1 MHz,
VDD = 3.3V.
VDDQ = 3.3V
Max.
Unit
5
pF
5
pF
5
pF
AC Test Loads and Waveforms
3.3V I/O Test Load
R = 317Ω
3.3V
OUTPUT
OUTPUT
Z0 = 50Ω
RL = 50Ω
5 pF
INCLUDING
JIG AND
SCOPE
VL = 1.5V
(a)
ALL INPUT PULSES
VDDQ
R = 351Ω
GND
90%
10%
90%
10%
≤ 1 ns
≤ 1 ns
(b)
(c)
Switching Characteristics Over the Operating Range [10, 11]
117 MHz
Parameter
tPOWER
Description
VDD(Typical) to the First
Access[12]
Min.
Max.
1
100 MHz
Min.
Max.
Unit
1
ms
Clock
tCYC
Clock Cycle Time
8.5
10
ns
tCH
Clock HIGH
3.0
4.0
ns
tCL
Clock LOW
3.0
4.0
ns
Output Times
tCDV
Data Output Valid after CLK Rise
tDOH
Data Output Hold after CLK Rise
[13, 14, 15]
tCLZ
Clock to Low-Z
tCHZ
Clock to High-Z[13, 14, 15]
tOEV
OE LOW to Output Valid
tOELZ
OE LOW to Output Low-Z[13, 14, 15]
7.5
2.0
8.5
2.0
0
3.5
0
ns
0
3.5
0
ns
ns
3.5
ns
3.5
ns
ns
High-Z[13, 14, 15]
tOEHZ
OE HIGH to Output
3.5
3.5
ns
Notes:
9. Tested initially and after any design or process change that may affect these parameters.
10. Timing reference level is 1.5V when VDDQ = 3.3V.
11. Test conditions shown in (a) of AC Test Loads unless otherwise noted.
12. This part has a voltage regulator internally; tPOWER is the time that the power needs to be supplied above VDD(minimum) initially before a Read or Write operation
can be initiated.
13. tCHZ, tCLZ,tOELZ, and tOEHZ are specified with AC test conditions shown in part (b) of AC Test Loads. Transition is measured ± 200 mV from steady-state voltage.
14. At any given voltage and temperature, tOEHZ is less than tOELZ 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.
15. This parameter is sampled and not 100% tested.
Document #: 38-05434 Rev. *A
Page 8 of 15
CY7C1214F
Switching Characteristics Over the Operating Range (continued)[10, 11]
117 MHz
Parameter
Description
Min.
Max.
100 MHz
Min.
Max.
Unit
Set-up Times
tAS
Address Set-up before CLK Rise
2.0
2.0
ns
tADS
ADSP, ADSC Set-up before CLK Rise
2.0
2.0
ns
tADVS
ADV Set-up before CLK Rise
2.0
2.0
ns
tWES
GW, BWE, BW[A:D] Set-up before CLK Rise
Data Input Set-up before CLK Rise
2.0
2.0
ns
tDS
2.0
2.0
ns
tCES
Chip Enable Set-up
2.0
2.0
ns
tAH
Address Hold after CLK Rise
0.5
0.5
ns
tADH
0.5
0.5
ns
tWEH
ADSP, ADSC Hold after CLK Rise
GW,BWE, BW[A:D] Hold after CLK Rise
0.5
0.5
ns
tADVH
ADV Hold after CLK Rise
0.5
0.5
ns
tDH
Data Input Hold after CLK Rise
0.5
0.5
ns
tCEH
Chip Enable Hold after CLK Rise
0.5
0.5
ns
Hold Times
Document #: 38-05434 Rev. *A
Page 9 of 15
CY7C1214F
Timing Diagrams
Read Cycle Timing[16]
tCYC
CLK
t
tADS
CH
t CL
tADH
ADSP
tADS
tADH
ADSC
tAS
tAH
A1
ADDRESS
A2
t
WES
t
WEH
GW, BWE,BW
[A:D]
tCES
Deselect Cycle
t CEH
CE
t
ADVS
t
ADVH
ADV
ADV suspends burst.
OE
t OEV
t OEHZ
t CLZ
Data Out (Q)
High-Z
Q(A1)
t OELZ
tCDV
t CHZ
tDOH
Q(A2)
Q(A2 + 1)
Q(A2 + 2)
Q(A2 + 3)
Q(A2)
Q(A2 + 1)
Q(A2 + 2)
t CDV
Single READ
BURST
READ
DON’T CARE
Burst wraps around
to its initial state
UNDEFINED
Note:
16. On this diagram, when CE is LOW, CE1 is LOW, CE2 is HIGH and CE3 is LOW. When CE is HIGH, CE1 is HIGH or CE2 is LOW or CE3 is HIGH.
Document #: 38-05434 Rev. *A
Page 10 of 15
CY7C1214F
Timing Diagrams (continued)
Write Cycle Timing[16, 17]
t CYC
CLK
t
tADS
t
CH
CL
tADH
ADSP
tADS
ADSC extends burst.
tADH
tADS
tADH
ADSC
tAS
tAH
A1
ADDRESS
A2
A3
Byte write signals are ignored for first cycle when
ADSP initiates burst.
tWES tWEH
BWE,
BW[A:D]
t
t
WES WEH
GW
tCES
tCEH
CE
tADVS tADVH
ADV
ADV suspends burst.
OE
t
Data in (D)
High-Z
t
OEHZ
t
DS DH
D(A1)
D(A2)
D(A2 + 1)
D(A2 + 1)
D(A2 + 2)
D(A2 + 3)
D(A3)
D(A3 + 1)
D(A3 + 2)
Data Out (Q)
BURST READ
Single WRITE
BURST WRITE
DON’T CARE
Extended BURST WRITE
UNDEFINED
Note:
17. Full width write can be initiated by either GW LOW; or by GW HIGH, BWE LOW and BW[A:D] LOW.
Document #: 38-05434 Rev. *A
Page 11 of 15
CY7C1214F
Timing Diagrams (continued)
Read/Write Timing[16, 18, 19]
tCYC
CLK
t
CH
tADS
tADH
tAS
tAH
t
CL
ADSP
ADSC
ADDRESS
A1
A2
A3
A4
A5
A6
D(A5)
D(A6)
t
t
WES WEH
BWE, BW[A:D]
tCES
tCEH
CE
ADV
OE
tDS
Data In (D)
Data Out (Q)
High-Z
t
OEHZ
Q(A1)
tDH
tOELZ
D(A3)
tCDV
Q(A2)
Back-to-Back READs
Q(A4)
Single WRITE
Q(A4+1)
Q(A4+2)
BURST READ
DON’T CARE
Q(A4+3)
Back-to-Back
WRITEs
UNDEFINED
Notes:
18. The data bus (Q) remains in High-Z following a Write cycle unless an ADSP, ADSC, or ADV cycle is performed.
19. GW is HIGH
Document #: 38-05434 Rev. *A
Page 12 of 15
CY7C1214F
Timing Diagrams (continued)
ZZ Mode Timing [20, 21
CLK
t ZZ
ZZ
I
t ZZREC
t ZZI
SUPPLY
I DDZZ
t RZZI
ALL INPUTS
(except ZZ)
DESELECT or READ Only
Outputs (Q)
High-Z
DON’T CARE
Ordering Information
Speed
(MHz)
100
Ordering Code
CY7C1214F-100AC
Package
Name
A101
Package Type
100-Lead Thin Quad Flat Pack
Operating
Range
Commercial
Shaded area contain advance information. Please contact your local Cypress sales representative for availability of this part. Please contact your local Cypress sales
representative for availability of 117-MHz speed grade option.
Notes:
20. Device must be deselected when entering ZZ mode. See Cycle Descriptions table for all possible signal conditions to deselect the device.
21. DQs are in High-Z when exiting ZZ sleep mode.
Document #: 38-05434 Rev. *A
Page 13 of 15
CY7C1214F
Package Diagram
100-Pin Thin Plastic Quad Flatpack (14 x 20 x 1.4 mm) A101
DIMENSIONS ARE IN MILLIMETERS.
16.00±0.20
1.40±0.05
14.00±0.10
100
81
80
1
20.00±0.10
22.00±0.20
0.30±0.08
0.65
TYP.
30
SEE DETAIL
50
0.20 MAX.
1.60 MAX.
STAND-OFF
0.05 MIN.
0.15 MAX.
0.25
GAUGE PLANE
0.10
0° MIN.
0°-7°
A
51
31
R 0.08 MIN.
0.20 MAX.
12°±1°
(8X)
SEATING PLANE
R 0.08 MIN.
0.20 MAX.
0.60±0.15
0.20 MIN.
1.00 REF.
DETAIL
A
51-85050-*A
Intel and Pentium are registered trademarks and i486 is a trademark of Intel Corporation. All product and company names
mentioned in this document may be the trademarks of their respective holders.
Document #: 38-05434 Rev. *A
Page 14 of 15
© Cypress Semiconductor Corporation, 2004. 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.
CY7C1214F
Document History Page
Document Title: CY7C1214F 1-Mb (32K x 32) Flow-Through Sync SRAM
Document Number: 38-05434
Issue Date
Orig. of
Change
REV.
ECN NO.
**
200780
See ECN
NJY
New Data Sheet
*A
213321
See ECN
VBL
Updated Ordering info: shaded part number, added explanation
Shaded selection guide and Characteristics table
Document #: 38-05434 Rev. *A
Description of Change
Page 15 of 15