128K x 36 Bit Flow–Through
BurstRAM Synchronous
Fast Static RAM
The MCM69F735 is a 4M bit synchronous fast static RAM designed to provide
a burstable, high performance, secondary cache for the PowerPC and other
high performance microprocessors. It is organized as 128K words of 36 bits
each. This device integrates input registers, a 2–bit address counter, and high
speed SRAM onto a single monolithic circuit for reduced parts count in cache
data RAM applications. Synchronous design allows precise cycle control with the
use of an external clock (K).
Addresses (SA), data inputs (DQx), and all control signals except output
enable (G
edge–triggered noninverting registers.
addresses can be generated internally by the MCM69F735 (burst sequence
operates in linear or interleaved mode dependent upon the state of LBO
controlled by the burst address advance (ADV
clock (K) input. This feature eliminates complex off–chip write pulse generation
and provides increased timing flexibility for incoming signals.
nous write enable (SW
to all bytes. The four bytes are designated as “a”, “b”, “c”, and “d”. SBa
DQa, SBb
writes SBx
or if all SBx
from the memory array .
operate on a 3.3 V or 2.5 V power supply . All inputs and outputs are JEDEC stan-
dard JESD8–5 compatible.
• MCM69F735 Speed Options
• 3.3 V + 10%, – 5% Core Power Supply , Operates with a 3.3 V or 2.5 V I/O
• ADSP
• Selectable Burst Sequencing Order (Linear/Interleaved)
• Single–Cycle Deselect Timing
• Internally Self–Timed Write Cycle
• Byte Write and Global Write Control
• PB1 Version 2.0 Compatible
• JEDEC Standard 119–Pin PBGA Package
) and linear burst order (LBO) are clock (K) controlled through positive–
Bursts can be initiated with either ADSP
Write cycles are internally self–timed and are initiated by the rising edge of the
Synchronous byte write (SBx
) are provided to allow writes to either individual bytes or
controls DQb, etc. Individual bytes are written if the selected byte
are asserted with SW. All bytes are written if either SGW is asserted
and SW are asserted.
For read cycles, a flow–through SRAM allows output data to simply flow freely
The MCM69F735 operates from a 3.3 V core power supply and all outputs
Speedt
150 MHz6.7 ns6 ns0.5 ns1 ns400 mA
133 MHz7.5 ns6.5 ns0.5 ns1 ns375 mA
117 MHz8.5 ns7 ns0.5 ns1 ns350 mA
Supply
, ADSC, and ADV Burst Control Pins
KHKH
), synchronous global write (SGW), and synchro-
Flow–Through
t
or ADSC input pins. Subsequent burst
) input pin.
KHQV
SetupHoldI
) and
controls
DD
MCM69F735
ZP PACKAGE
PBGA
CASE 999–01
BurstRAM is a trademark of Motorola, Inc.
The PowerPC name is a trademark of IBM Corp., used under license therefrom.
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
5/23/97
Motorola, Inc. 1997
MOTOROLA FASTSRAM
MCM69F735
1
Page 2
LBO
ADV
K
ADSC
ADSP
SA
SA1
SA0
SGW
FUNCTIONAL BLOCK DIAGRAM
K2
ADDRESS
REGISTER
17
BURST
COUNTER
CLR
2
15
2
17
128K x 36
ARRAY
SW
SBa
SBb
SBc
SBd
SE1
SE2
SE3
WRITE
REGISTER
a
WRITE
REGISTER
b
WRITE
REGISTER
c
WRITE
REGISTER
d
K2
ENABLE
REGISTER
4
DATA–IN
REGISTER
K
36
36
G
MCM69F735
2
DQa – DQd
MOTOROLA FAST SRAM
Page 3
PIN ASSIGNMENT
6543217
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
SASASASA
V
DDQ
NCSE2SAADSC
SASASASA
NC
DQcDQcVSSNCDQb
DQcDQc
V
DQcV
DDQ
DQc
DQcVSSSGW
V
V
V
DD
DDQ
DQdDQdV
DQdV
DDQ
DQdDQd
DQdDQdVSSSA0
SASA
NC
NCSASANC
NC
DDQ
SS
SS
SBcDQcDQc
NCV
SS
SBdDQdDQd
SS
SS
LBO
NCNC
ADSP
SE3
SA
V
DD
V
SS
V
DQbSE1V
SS
DQb
V
G
SS
DQbADV
SBb
V
DQb
SS
V
NCV
DD
KV
NC
SW
DD
SA
NC
V
V
V
SS
SS
SS
SS
NCV
NC
DQa
DQaSBa
DQa
DQaSA1V
DQa
NC
DD
V
V
V
V
V
DDQ
NC
NC
DQb
DQb
DDQ
DQb
DQb
DDQ
DQa
DQa
DDQ
DQa
DQa
NC
NC
DDQ
TOP VIEW 119 BUMP PBGA
Not to Scale
MOTOROLA FAST SRAM
MCM69F735
3
Page 4
PBGA PIN DESCRIPTIONS
Pin LocationsSymbol
4BADSCInputSynchronous Address Status Controller: Active low, interrupts any
4AADSPInputSynchronous Address Status Processor: Active low, interrupts any
4GADVInputSynchronous Address Advance: Increments address count in
(a) 6K, 7K, 6L, 7L, 6M, 6N, 7N, 6P, 7P
(b) 6D, 7D, 6E, 7E, 6F, 6G, 7G, 6H, 7H
(c) 1D, 2D, 1E, 2E, 2F, 1G, 2G, 1H, 2H
(d) 1K, 2K, 1L, 2L, 2M, 1N, 2N, 1P, 2P
4FGInputAsynchronous Output Enable Input:
4KKInputClock: This signal registers the address, data in, and all control signals
3RLBOInputLinear Burst Order Input: This pin must remain in steady state (this
2A, 3A, 5A, 6A, 3B, 5B, 2C, 3C,
5C, 6C, 2R, 6R, 3T, 4T, 5T
4N, 4PSA1, SA0InputSynchronous Address Inputs: These pins must be wired to the two
5L, 5G, 3G, 3L
(a) (b) (c) (d)
4ESE1InputSynchronous Chip Enable: Active low to enable chip.
2BSE2InputSynchronous Chip Enable: Active high for depth expansion.
6BSE3InputSynchronous Chip Enable: Active low for depth expansion.
4HSGWInputSynchronous Global Write: This signal writes all bytes regardless of the
4MSWInputSynchronous Write: This signal writes only those bytes that have been
4C, 2J, 4J, 6J, 4RV
1A, 7A, 1F, 7F, 1J, 7J, 1M, 7M, 1U, 7UV
3D, 5D, 3E, 5E, 3F, 5F, 3H, 5H,
3K, 5K, 3M, 5M, 3N, 5N, 3P, 5P
1B, 7B, 1C, 7C, 4D, 3J, 5J, 4L, 1R, 5R,
7R, 1T, 2T, 6T, 7T, 2U, 3U, 4U, 5U, 6U
TypeDescription
ongoing burst and latches a new external address. Used to initiate a
READ, WRITE, or chip deselect.
ongoing burst and latches a new external address used to initiate a new
READ or chip deselect (exception — chip deselect does not occur
when ADSP
accordance with counter type selected (linear/interleaved).
DQxI/OSynchronous Data I/O: “x” refers to the byte being read or written
SAInputSynchronous Address Inputs: These inputs are registered and must
SBxInputSynchronous Byte Write Inputs: “x” refers to the byte being written (byte
DD
DDQ
V
SS
NC—No Connection: There is no connection to the chip.
SupplyCore Power Supply.
SupplyI/O Power Supply.
SupplyGround.
(byte a, b, c, d).
Low — enables output buffers (DQx pins).
High — DQx pins are high impedance.
except G
signal not registered or latched). It must be tied high or low.
Low — linear burst counter (68K/PowerPC).
High — interleaved burst counter (486/i960/Pentium).
meet setup and hold times.
LSBs of the address bus for proper burst operation. These inputs are
registered and must meet setup and hold times.
a, b, c, d). SGW
Negated high — blocks ADSP
asserted.
status of the SBx
being used, tie this pin high.
selected using the byte write SBx
are being used, tie this pin low.
is asserted and SE1 is high).
and LBO.
overrides SBx.
or deselects chip when ADSC is
and SW signals. If only byte write signals SBx are
ReadHHXXXX
ReadHLHHHH
Write Byte aHLLHHH
Write Byte bHLHLHH
Write Byte cHLLHLH
Write Byte dHLHLHL
Write All BytesHLLLLL
Write All BytesLXXXXX
4
5
5
MOTOROLA FAST SRAM
MCM69F735
5
Page 6
ABSOLUTE MAXIMUM RATINGS (See Note 1)
RatingSymbolValueUnit
Power Supply VoltageV
I/O Supply Voltage (See Note 2)V
Input Voltage Relative to VSS for Any
Pin Except VDD (See Note 2)
Input Voltage (Three–State I/O)
(See Note 2)
Output Current (per I/O)I
Package Power Dissipation (See Note 3)P
Temperature Under BiasT
Storage TemperatureT
NOTES:
1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are
exceeded. Functional operation should be restricted to RECOMMENDED OPERATING CONDITIONS. Exposure to higher than recommended voltages for extended
periods of time could affect device reliability.
2. This is a steady–state DC parameter that is in effect after the power supply has
achieved its nominal operating level. Power sequencing can not be controlled and
is not allowed.
3. Power dissipation capability is dependent upon package characteristics and use
environment. See Package Thermal Characteristics.
DD
DDQ
Vin, V
V
out
bias
stg
VSS – 0.5 to + 4.6V
VSS – 0.5 to V
out
IT
D
VSS – 0.5 to
VDD + 0.5
VSS – 0.5 to
V
DDQ
– 10 to 85°C
– 55 to 125°C
DD
+ 0.5
± 20mA
1.6W
V
V
V
This device contains circuitry to protect the
inputs against damage due to high static voltages or electric fields; however, it is advised
that normal precautions be taken to avoid
application of any voltage higher than maximum rated voltages to this high–impedance
circuit.
PACKAGE THERMAL CHARACTERISTICS — PBGA
RatingSymbolMaxUnitNotes
Junction to Ambient (@ 200 lfm)Single Layer Board
Four Layer Board
Junction to Board (Bottom)R
Junction to Case (Top)R
NOTES:
1. Junction temperature is a function of on–chip power dissipation, package thermal resistance, mounting site (board) temperature, ambient
temperature, air flow, board population, and board thermal resistance.
2. Per SEMI G38–87.
3. Indicates the average thermal resistance between the die and the printed circuit board.
4. Indicates the average thermal resistance between the die and the case top surface via the cold plate method (MIL SPEC–883 Method 1012.1).
R
θJA
θJB
θJC
41
19
11°C/W3
9°C/W4
°C/W1, 2
MCM69F735
6
MOTOROLA FAST SRAM
Page 7
DC OPERA TING CONDITIONS AND CHARACTERISTICS
(3.6 V ≥ VDD ≥ 3.135 V, 70°C ≥ TA ≥ 0°C, Unless Otherwise Noted)
RECOMMENDED OPERATING CONDITIONS
ParameterSymbolMinTypMaxUnit
Supply VoltageV
I/O Supply VoltageV
Ambient TemperatureT
Input Low VoltageV
Input High VoltageV
Input High Voltage I/O PinsV
VSS – 1.0 V
(Voltages Referenced to VSS = 0 V)
V
IH
V
SS
DD
DDQ
A
IL
IH
IH2
20% t
3.1353.33.6V
2.3753.3V
0—70°C
– 0.3—0.8V
2.0—VDD + 0.3V
2.0—V
(MIN)
KHKH
Figure 1. Undershoot Voltage
DC CHARACTERISTICS AND SUPPLY CURRENTS
ParameterSymbolMinTypMaxUnitNotes
Input Leakage Current (0 V ≤ Vin ≤ VDD)I
Output Leakage Current (0 V ≤ Vin ≤ VDD)I
AC Supply Current (Device Selected,MCM69F735–6
All Outputs Open, Freq = Max)MCM69F735–6.5
Includes VDD and V
CMOS Standby Supply Current (Device Deselected, Freq = 0,
VDD = Max, All Inputs Static at CMOS Levels Vin ≤ VSS + 0.2 V
or ≥ VDD – 0.2 V)
TTL Standby Supply Current (Device Deselected, Freq = 0,
VDD = Max, All Inputs Static at Vin ≤ VIL or ≥ VIH)
Clock Running (Device Deselected, Freq = Max,MCM69F735–6
VDD = Max, All Inputs Toggling at CMOS Levels
Vin ≤ VSS + 0.2 or ≥ VDD – 0.2)
Static Clock Running (Device Deselected,MCM69F735–6
Freq = Max, VDD = Max, All Inputs Static at ≤ VIL or ≥ VIH)
Output Low Voltage (IOL = 2 mA) V
Output High Voltage (IOH = – 2 mA) V
Output Low Voltage (IOL = 8 mA) V
Output High Voltage (IOH = – 4 mA) V
NOTES:
1. LBO
pin has an internal pullup and will exhibit leakage currents of ± 5 µA.
2. Reference AC Operating Conditions and Characteristics for input and timing (VIH/VIL, tr/tf, pulse level 0 to 3.0 V).
3. All addresses transition simultaneously low (LSB) and then high (MSB).
4. Data states are all zero.
5. Device in Deselected mode as defined by the Truth Table.
DDQ
= 2.5 VV
DDQ
DDQ
= 3.3 VV
DDQ
DDQ
MCM69F735–7
= 2.5 VV
= 3.3 VV
(I)——± 1µA1
lkg
(O)——± 1µA
lkg
I
DDA
I
SB2
I
SB3
I
SB4
I
SB5
OL1
OH1
OL2
OH2
—
—
—
——TBDmA5
——TBDmA5
——TBDmA5
——TBDmA5
——0.7V
1.7——V
——0.4V
2.4——V
—
—
—
400
375
350
DD
+ 0.3V
DDQ
V
mA2, 3, 4
CAPACITANCE (f = 1.0 MHz, dV = 3.0 V, 70°C ≥ T
ParameterSymbolMinTypMaxUnit
Input CapacitanceC
Input/Output CapacitanceC
≥ 0°C, Periodically Sampled Rather Than 100% Tested)
A
MOTOROLA FAST SRAM
in
I/O
—45pF
—78pF
MCM69F735
7
Page 8
AC OPERA TING CONDITIONS AND CHARACTERISTICS
(3.6 V ≥ VDD ≥ 3.135 V, 70°C ≥ TA ≥ 0°C, Unless Otherwise Noted)
Cycle Timet
Clock High Pulse Widtht
Clock Low Pulse Widtht
Clock Access Timet
Output Enable to Output Validt
Clock High to Output Activet
Clock High to Output Changet
Output Enable to Output Activet
Output Disable to Q High–Zt
Clock High to Q High–Zt
Setup Times:Address
ADSP
Hold Times: Address
NOTES:
1. Write is defined as either any SBx
or ADSC is asserted.
2. All read and write cycle timings are referenced from K or G
3. Tested per AC Test Load, Figure 2.
4. Measured at
5. This parameter is sampled and not 100% tested.
± 200 mV from steady state.
ADSP
Data In
Write
Chip Enable
, ADSC, ADV
, ADSC, ADV
Data In
Write
Chip Enable
and SW low or SGW is low. Chip Enable is defined as SE1 low , SE2 high, and SE3 low whenever ADSP
2. Rise time is measured from 0.4 to 2.4 V unloaded.
3. Fall time is measured from 2.4 to 0.4 V unloaded.
2.42.4
0.40.4
2.4
0.40.4
t
r
Figure 3. Unloaded Rise and Fall Time Characterization
TEST POINT
2.4
t
f
MOTOROLA FAST SRAM
MCM69F735
9
Page 10
VOLTAGE (V)
– 0.5
0
1.4
1.65
2.0
3.135
3.6
VOLTAGE (V)
– 0.5
0
0.8
1.25
1.5
2.3
2.7
2.9
PULL–UP
I (mA) MINI (mA) MAX
– 40
– 40
– 40
– 37
– 28
0
0
– 120
– 120
– 120
– 104
– 81
– 20
0
(a) Pull–Up for 3.3 V I/O Supply
PULL–UP
I (mA) MINI (mA) MAX
– 26
– 26
– 26
– 18
– 14
0
0
0
– 75
– 75
– 75
– 58
– 49
– 21
– 7
0
(b) Pull–Up for 2.5 V I/O Supply
3.6
3.135
2.8
1.65
VOLTAGE (V)
1.4
0
0– 40
CURRENT (mA)
2.9
2.5
2.3
2.1
1.25
VOLTAGE (V)
0.8
0
0– 26– 75
CURRENT (mA)
– 120
VOLTAGE (V)
MCM69F735
10
– 0.5
0
0.5
1
1.65
1.8
3.6
4
PULL–DOWN
I (mA) MINI (mA) MAX
– 34
0
17
35
45
46
46
46
– 126
0
47
90
114
120
120
120
(c) Pull–Down for 3.3 V and 2.5 V I/O Supply
Figure 4. T ypical Output Buffer Characteristics
V
DD
1.8
1.65
VOLTAGE (V)
0.3
0
046120
CURRENT (mA)
MOTOROLA FAST SRAM
Page 11
CD
READ/WRITE CYCLES
GLQV
t
Q(B)D(C)D(C+1)D(C+2)D(C+3)Q(D)
GLQX
t
SE2, SE3
ADSP, SA
GHQZ
t
BURST WRITE
IGNORED
KLKH
t
KHKL
t
KHKH
t
Q(B+2)Q(B+3)
BURST WRAPS AROUND
KHQX2
Q(B)Q(B+1)
t
KHQV
t
AB
K
SA
ADSP
ADSC
ADV
SE1
E
W
G
Q(A)Q(n)
DQx
KHQX1
t
KHQZ
t
BURST READSINGLE READ
DESELECTEDSINGLE READ
W low = SGW low and/or SW and SBx low.
NOTE: E low = SE2 high and SE3 low.
MOTOROLA FAST SRAM
MCM69F735
11
Page 12
APPLICATION INFORMATION
STOP CLOCK OPERATION
In the stop clock mode of operation, the SRAM will hold all
state and data values even though the clock is not running
(full static operation). The SRAM design allows the clock to
start with ADSP
and ADSC, and stops the clock after the last
write data is latched, or the last read data is driven out.
When starting and stopping the clock, the AC clock timing
and parametrics must be strictly maintained. For example,
clock pulse width and edge rates must be guaranteed when
STOP CLOCK WITH READ TIMING
K
ADSP
ADDRESS
A1A2
starting and stopping the clocks.
To achieve the lowest power operation for all three stop
clock modes, stop read, stop write, and stop deselect:
1. Force the clock to a low state.
2. Force the control signals to an inactive state (this guarantees any potential source of noise on the clock input
will not start an unplanned on activity).
3. Force the address inputs to a low state (VIL), preferably
< 0.2 V.
ADV
DQx
ADSP
(INITIATES
BURST READ)
NOTE: For lowest possible power consumption during stop clock, the addresses should be driven to a low state (VIL).
Best results are obtained if VIL < 0.2 V.
CLOCK STOP
(CONTINUE
BURST READ)
WAKE UP ADSP
(INITIATES BURST READ)
Q(A2)Q(A2+1)Q(A1)
MCM69F735
12
MOTOROLA FAST SRAM
Page 13
K
ADSC
STOP CLOCK WITH WRITE TIMING
ADDRESS
WRITE
ADV
DATA IN
DQx
NOTE: While the clock is stopped, DAT A IN must be fixed in a high (VIH) or low (VIL) state to reduce the DC current of the input
buffers. For lowest power operation, all data and address lines should be held in a low (VIL) state and control lines held
in an inactive state.
A1
D(A1)
ADSC
(INITIATES
BURST WRITE)
D(A1+1)
CLOCK STOP
(CONTINUE
BURST WRITE)
VIH OR VIL FIXED (SEE NOTE)
HIGH–Z
A2
D(A2)
WAKE UP ADSC
(INITIATES BURST WRITE)
MOTOROLA FAST SRAM
MCM69F735
13
Page 14
K
ADSC
SE1
STOP CLOCK WITH DESELECT OPERATION TIMING
DATA IN
DQx
NOTE: While the clock is stopped, DATA IN must be fixed in a high (VIH) or low (VIL) state to reduce the DC current of
DATADATA
CONTINUE
BURST READ
the input buffers. For lowest power operation, all data and address lines should be held in a low (VIL) state and
control lines held in an inactive state.
CLOCK STOP
(DESELECTED)
VIH OR VIL FIXED (SEE NOTE)
HIGH–Z
WAKE UP
(DESELECTED)
MCM69F735
14
MOTOROLA FAST SRAM
Page 15
NON–BURST SYNCHRONOUS OPERATION
Although this BurstRAM has been designed for PowerPC–
based and other high end MPU–based systems, these
SRAMs can be used in other high speed L2 cache or
memory applications that do not require the burst address
feature. Most L2 caches designed with a synchronous interface can make use of the MCM69F735. The burst counter
CONTROL PIN TIE VALUES
Non–BurstADSP ADSCADVSE1LBO
Sync Non–Burst,
Flow–Through SRAM
NOTE: Although X is specified in the table as a don’t care, the pin
must be tied either high or low.
(H ≥ VIH, L ≤ VIL)
HLHLX
feature of the BurstRAM can be disabled, and the SRAM can
be configured to act upon a continuous stream of addresses.
See Figure 5.
K
ADDRABCDEFGH
W
G
DQ
Motorola Memory Prefix
Part Number
Full Part Numbers — MCM69F735ZP6MCM69F735ZP6.5MCM69F735ZP7
Q(B)Q(A)
Q(D)Q(C)D(E)
D(F)D(G)D(H)
Figure 5. Configured as Non–Burst Synchronous SRAM
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
How to reach us:
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MCM69F73516
◊
MOTOROLA FASTSRAM
MCM69F735/D
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