7025ERPQS-35 [MAXWELL]

(8K x 16-Bit) Dual Port RAM High-Speed CMOS; ( 8K ×16位),双端口RAM的高速CMOS
7025ERPQS-35
型号: 7025ERPQS-35
厂家: MAXWELL TECHNOLOGIES    MAXWELL TECHNOLOGIES
描述:

(8K x 16-Bit) Dual Port RAM High-Speed CMOS
( 8K ×16位),双端口RAM的高速CMOS

存储 内存集成电路 静态存储器
文件: 总20页 (文件大小:524K)
中文:  中文翻译
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7025E  
(8K x 16-Bit) Dual Port RAM  
High-Speed CMOS  
Logic Diagram  
FEATURES:  
DESCRIPTION:  
8K x 16-bit dual port RAM  
- Stand Alone  
- Master Slave  
RAD-PAK® radiation-hardened against natural space  
radiation  
Maxwell Technologies’ 7025E Dual Port RAM High Speed  
CMOS® microcircuit features a greater than 100 krad (Si) total  
dose tolerance, depending upon space mission. The 7025E is  
designed to be used as a stand-alone 128k-bit Dual Port RAM  
or as a combination MASTER/SLAVE Dual-Port RAM for 32-  
bit or more word systems. This design results in full-speed,  
error-free operation without the need for additional discrete  
logic. The 7025E provides two independent ports with sepa-  
rate control, address, and I/O pins that permit independent,  
asynchronous access for reads or writes to any location in  
memory. An automatic power down feature controlled by CS  
permits the on-chip circuitry of each port to enter a very low  
standby power mode.  
Total dose hardness:  
- > 100 krad (Si), depending upon space mission  
Excellent Single Event Effects:  
-SELTH LET = >100 MeV/mg/cm2  
-SEUTH LET = 7 MeV/mg/cm2  
Package:  
-84 Pin RAD-PAK® quad flat pack  
Separate upper byte and lower byte control for multiplexed  
bus compatibility  
High speed access time: 35/45 ns  
Expandable to 32 bits or more using master/slave select  
when cascading  
High speed CMOS technology  
-TTL compatible, single 5V power supply  
-Interrupt flag for port-to-port communication  
-On chip port arbitration logic  
-Asynchronous operation from either port  
Maxwell Technologies' patented RAD-PAK® packaging technol-  
ogy incorporates radiation shielding in the microcircuit pack-  
age. It eliminates the need for box shielding while providing  
the required radiation shielding for a lifetime in orbit or space  
mission. In a GEO orbit, RAD-PAK provides greater than 100  
krad (Si) radiation dose tolerance. This product is available  
with screening up to Class S.  
08.15.02 Rev 2  
1
All data sheets are subject to change without notice  
(619) 503-3300- Fax: (619) 503-3301- www.maxwell.com  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
TABLE 1. 7025E PINOUT DESCRIPTION  
NAMES  
LEFT PORT  
RIGHT PORT  
Chip Select  
CSL  
R/WL  
CSR  
R/WR  
Read/Write Select  
Output Select  
Address  
OSL  
OSR  
AOL-A12L  
I/OOL-I/O15L  
SEML  
AOR-A12R  
I/OOR-I/O15R  
SEMR  
Data Input/Output  
Semaphore Select  
Upper Byte Select  
Lower Byte Select  
Interrupt Flag  
UBL  
UBR  
LBL  
LBR  
INTL  
INTR  
Busy Flag  
BUSYL  
BUSYR  
M/S  
VCC  
Master or Slave Select  
Power  
GND  
Ground  
TABLE 2. 7025E ABSOLUTE MAXIMUM RATINGS  
PARAMETER  
SYMBOL  
MIN  
MAX  
UNITS  
Supply Voltage (Relative to VSS)  
Operating Temperature Range  
Input or Output Voltage Applied  
Storage Temperature Range  
VCC  
TA  
-0.3  
-55  
7.0  
125  
V
°C  
V
--  
GND -0.3V  
-65  
V
CC+ 0.3  
150  
TSTG  
°C  
TABLE 3. DELTA LIMITS  
PARAMETER  
VARIATION  
ICCOP  
ICCOP1  
ICCSB  
ICCSB1  
± 10% AS STATED I TABLE 6  
± 10% AS STATED I TABLE 6  
± 10% AS STATED I TABLE 6  
± 10% AS STATED I TABLE 6  
TABLE 4. 7025E RECOMMENDED OPERATING CONDITIONS  
PARAMETER  
SYMBOL  
MIN  
MAX  
UNITS  
Supply Voltage Positive  
Input Voltage  
VCC  
4.5  
5.5  
V
V
VIL  
VIH  
-0.5  
2.2  
0.8  
6.0  
08.15.02 Rev 2  
All data sheets are subject to change without notice  
2
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
TABLE 4. 7025E RECOMMENDED OPERATING CONDITIONS  
PARAMETER  
SYMBOL  
MIN  
MAX  
UNITS  
Thermal Impedance  
ΘJC  
--  
1.02  
125  
°C/W  
°C  
Operating Temperature Range  
TA  
-55  
TABLE 5. 7025E CAPACITANCE  
PARAMETER  
SYMBOL  
MIN  
MAX  
UNITS  
Input Capacitance: VIN = 0V1  
Output Capacitance: VOUT = 0V1  
CIN  
--  
--  
5
7
pF  
pF  
COUT  
1. Guaranteed by design.  
TABLE 6. 7025E DC ELECTRICAL CHARACTERISTICS  
(VCC = 5V ± 10%, TA = -55 TO 125 °C UNLESS OTHERWISE)  
PARAMETER  
SYMBOL  
SUBGROUPS  
MIN  
MAX  
UNITS  
Input Leakage Current 1  
Output Leakage Current 2  
ILI  
ILO  
1, 2, 3  
1, 2, 3  
1, 2, 3  
--  
--  
±10  
±10  
µA  
µA  
mA  
Standby Supply Current, Both ports TTL level inputs  
ICCSB  
-35  
-45  
--  
--  
50  
50  
Standby Supply Current, Both ports CMOS level inputs  
-35  
-45  
ICCSB1  
1, 2, 3  
1, 2, 3  
1, 2, 3  
mA  
mA  
mA  
--  
--  
5
5
Operating Supply Current, Both ports Active  
-35  
-45  
ICCOP  
--  
--  
320  
280  
Operating Supply Current, One Port Active, One Port Standby  
ICCOP1  
-35  
-45  
--  
--  
190  
180  
Input Low Voltage3  
Input High Voltage  
Output Low Voltage 4  
Output High Voltage  
VIL  
VIH  
1, 2, 3  
1, 2, 3  
--  
2.2  
0.8  
--  
V
V
VOL  
VOH  
--  
2.4  
0.4  
--  
1. VCC = 5.5V, VIN = GND to VCC, CS = VIH, VOUT = 0 to VCC.  
2. Vcc=5.5V; Vout = GND to Vcc  
3. VIH max = VCC + 0.3V, VIL min = -0.3V or -1V pulse width 50 ns  
4. VCC min, IOL = 4 mA, IOH = -4 mA.  
08.15.02 Rev 2  
All data sheets are subject to change without notice  
3
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
TABLE 7. 7025E AC ELECTRICAL CHARACTERISTICS FOR READ CYCLE  
(VCC = 5V ± 10%, VSS = 0V, TA = -55 TO 125 °C)  
PARAMETER  
SYMBOL  
SUBGROUPS  
MIN  
MAX  
UNIT  
Read Cycle Time  
-35  
-45  
tRC  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
ns  
35  
45  
--  
--  
Address Access Time  
-35  
-45  
tAA  
tACS  
tABE  
tAOE  
tLZ  
ns  
ns  
ns  
ns  
ns  
--  
--  
35  
45  
Chip Select Access Time 1  
-35  
-45  
--  
--  
35  
45  
Byte Select Access Time 1  
-35  
-45  
--  
--  
35  
45  
Output Select to Output Valid  
-35  
-45  
--  
--  
20  
25  
Output Low Z Time 2,3  
-35  
-45  
3
3
--  
--  
Output High Z Time 2,3  
tHZ  
-35  
-45  
--  
--  
20  
20  
ns  
Chip Enable to Power Up Time 2  
tPU  
tPD  
9, 10, 11  
9, 10, 11  
9, 10, 11  
0
--  
--  
50  
--  
ns  
ns  
ns  
Chip Disable to Power Up Time 2  
Semaphore Flag Update Pulse (OE or SEM)  
tSOP  
15  
1. To access RAM, CS = VIL, UB or LB = VIL, SEM = VIH. To access semaphore, CS = VIN and SEM = VIL. Either condition must be  
valid for the entire tEW time.  
2. Guaranteed by design.  
3. Transition is measured ± 500 mV from low or high impedance voltage with load.  
TABLE 8. 7025E AC ELECTRICAL CHARACTERISTICS FOR WRITE CYCLE  
(VCC = 5V ± 10%, VSS = 0V, TA = -55 TO 125 °C)  
PARAMETER  
SYMBOL  
SUBGROUPS  
MIN  
MAX  
UNIT  
Write Cycle Time  
tWC  
9, 10, 11  
ns  
-35  
-45  
35  
45  
--  
--  
Address Valid to End of Write  
tAW  
9, 10, 11  
ns  
-35  
-45  
30  
40  
--  
--  
08.15.02 Rev 2  
All data sheets are subject to change without notice  
4
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
TABLE 8. 7025E AC ELECTRICAL CHARACTERISTICS FOR WRITE CYCLE  
(VCC = 5V ± 10%, VSS = 0V, TA = -55 TO 125 °C)  
PARAMETER  
SYMBOL  
SUBGROUPS  
MIN  
MAX  
UNIT  
Chip Select to End of Write 1  
-35  
-45  
tSW  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
9, 10, 11  
ns  
30  
40  
--  
--  
Address Setup Time  
-35  
-45  
tAS  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
0
0
--  
--  
Write Pulse Width  
-35  
-45  
tWP  
30  
35  
--  
--  
Write Recovery Time  
-35  
-45  
tWR  
tDW  
tHZ  
0
0
--  
--  
Data Valid to End of Write  
-35  
-45  
Output High Z Time 2,3  
-35  
-45  
25  
25  
--  
--  
--  
--  
20  
20  
Data Hold Time  
-35  
-45  
Write Select to Output in High Z 2,3  
-35  
-45  
tDH  
0
0
--  
--  
tWZ  
--  
--  
20  
20  
2,3,4  
Output Active from End of Write  
-35  
-45  
tOW  
tSWRD  
tSPS  
0
0
--  
--  
SEM Flag Write to Read Time  
-35  
-45  
10  
10  
--  
--  
SEM Flag Contention Window  
-35  
-45  
10  
10  
--  
--  
1. To access RAM, CS = VIL, UB or LB = VIL, SEM = VIH. To access semaphore, CS = VIN and SEM = VIL. Either condition must be  
valid for the entire tEW time.  
2. Guaranteed by design.  
3. Transition is measured ± 500 mV from low or high impedance voltage with load.  
4. The specification for tDH must be met by the device supplying write data to the RAM under all operating conditions. Although tDH  
and tDW  
.
08.15.02 Rev 2  
All data sheets are subject to change without notice  
5
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
TABLE 9. 7025E AC ELECTRICAL CHARACTERISTICS FOR WRITE MASTER/SLAVE CONFIGURATION  
(VCC = 5V ± 10%, VSS = 0V, TA = -55 TO 125 °C)  
PARAMETER  
SYMBOL  
MIN  
MAX  
UNIT  
For Master Only  
BUSY Access Time to Address Match  
tBAA  
ns  
-35  
-45  
--  
--  
35  
35  
BUSY Disable Time to Address Not Matched  
-35  
-45  
tBDA  
tBAC  
tBDC  
tWDD  
tDDD  
tAPS  
tBDD  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
--  
--  
30  
30  
BUSY Access Time to Chip Select Low  
-35  
-45  
--  
--  
30  
30  
BUSY Disable Time to Chip Select High  
-35  
-45  
Write Pulse to Data Delay 1  
-35  
-45  
Write Data Valid to Read Data Delay 1  
-35  
-45  
Arbitration Priority Setup Time 2  
-35  
-45  
--  
--  
25  
25  
--  
--  
60  
70  
--  
--  
45  
55  
5
5
--  
--  
BUSY Disable to Valid Data  
-35  
-45  
3
3
--  
--  
For Slave Only  
Write to BUSY Input 4  
Write Hold after BUSY 5  
Write Pulse to Data Delay 1  
tWB  
tWH  
0
--  
--  
ns  
ns  
ns  
25  
tWDD  
-35  
-45  
--  
--  
60  
70  
Write Data Valid to Read Data Delay 1  
tDDD  
ns  
-35  
-45  
--  
--  
45  
55  
1. Port to port timing delay through RAM cells from writing port to reading port.  
2. To ensure that the earlier of the two ports wins.  
3. tBDD is a calculated parameter and is the greater of 0, tWDD - tWP (actual) or tDDD - tWD (actual).  
4. To ensure that the write cycle is inhibited during contention.  
5. To ensure that a write cycle is completed after contention.  
08.15.02 Rev 2  
All data sheets are subject to change without notice  
6
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
TABLE 10. 7025E AC PARAMETERS FOR INTERRUPT TIMING  
(VCC = 5V ± 10%, TA = -55 TO 125 °C, f = 1 MHZ)  
PARAMETER  
SYMBOL  
MIN  
MAX  
UNITS  
Address Setup Time  
Write Recovery Time  
tAS  
tWR  
tINS  
0
0
--  
--  
ns  
ns  
ns  
Interrupt Set Time  
-35  
-45  
--  
--  
30  
35  
Interrupt Reset Time  
tINR  
ns  
-35  
-45  
--  
--  
30  
35  
1
TABLE 11. 7025E TRUTH TABLE FOR INTERRUPT FLAG CONTROL  
A0-A12  
FUNCTION  
R/W  
CS  
OS  
INT  
Left Port  
Set right INTL flag  
Reset right INTL flag  
Set left INTL flag  
Reset left INTL flag  
Right Port  
L
X
X
X
L
X
X
L
X
X
X
L
1FFF  
X
X
X
X
L 2  
H 3  
1FFE  
Set right INTR flag  
Reset right INTR flag  
Set left INTR flag  
Reset left INTR flag  
X
X
L
X
L
L
X
X
L
X
L 3  
H 2  
X
1FFF  
1FFE  
X
X
X
X
X
1. Assumes BUSYL = BUSYR = H.  
2. If BUSYR = L, then no change.  
3. If BUSYL = L, then no change.  
08.15.02 Rev 2  
All data sheets are subject to change without notice  
7
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
TABLE 12. 7025E TRUTH TABLE FOR ARBITRATION OPTIONS  
OPTIONS  
INPUTS  
OUTPUTS  
CS  
UB  
LB  
M/S  
SEM  
BUSY  
INT  
--  
Busy Logic Master  
Busy Logic Slave  
Interrupt Logic  
L
L
X
L
L
X
H
H
H
H
Output Signal  
L
L
X
L
L
X
L
L
H
H
Input Signal  
--  
--  
L
L
X
L
L
X
X
X
H
H
Output Signal  
--  
Semaphore Logic  
H
H
X
X
X
X
H
L
L
L
H
HI-Z  
TABLE 13. 7025E NON-CONTENTION READ/WRITE CONTROL  
1
MODE  
OUTPUTS  
INPUTS  
CS  
R/W  
OE  
UB  
LB  
SEM  
I/O8-I/O15  
I/O0-I/O7  
H
X
X
X
X
X
X
H
X
H
H
H
HI-Z  
HI-Z  
HI-Z  
HI-Z  
Deselected power down  
Both bytes deselected:  
Power down  
L
L
L
L
L
L
X
L
L
X
X
X
L
L
H
L
H
L
H
H
H
H
H
H
X
DATAIN  
HI-Z  
HI-Z  
DATAIN  
DATAIN  
HI-Z  
Write to upper byte only  
Write to lower byte only  
Write to both bytes  
L
L
DATAIN  
DATAOUT  
HI-Z  
H
H
H
X
L
H
L
Read upper byte only  
L
H
L
DATAOUT Read lower byte only  
DATAOUT Read both bytes  
L
L
DATAOUT  
HI-Z  
H
X
X
HI-Z  
Outputs disabled  
1. AOL - A12L = AOR-A12R.  
08.15.02 Rev 2  
All data sheets are subject to change without notice  
8
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
1
TABLE 14. 7025E SEMAPHORE READ/WRITE CONTROL  
INPUTS  
OUTPUTS  
MODE  
CS  
H
R/W  
H
OE  
L
UB  
X
LB  
X
SEM  
L
I/O8-I/O15  
DATAOUT  
I/O0-I/O7  
DATAOUT Read data in semaphore  
flag  
X
H
X
H
L
X
X
H
X
H
H
X
H
L
L
L
DATAOUT  
DATAIN  
DATAOUT Read data in semaphore  
flag  
DATAIN  
Write DinO into semaphore  
flagf  
DATAIN  
DATAIN  
Write DinO into semaphore  
flag  
L
L
X
X
X
X
L
X
L
L
L
--  
--  
--  
--  
Not allowed  
Not allowed  
X
1. AOL - A12L = AOR-A12R.  
08.15.02 Rev 2  
All data sheets are subject to change without notice  
9
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
1,2,3  
FIGURE 1. TIMING WAVEFORM OF READ CYCLE NO. 1, EITHER SIDE  
1,4,5  
FIGURE 2. TIMING WAVEFORM OF READ CYCLE NO. 2, EITHER SIDE  
1. F/W is high for read cycles.  
2. Device is continuously enabled, CS = VIL, UB or LB = VL. This waveform cannot be used for semaphore reads.  
3. CE = VIL.  
4. Addresses valid prior to or coincident with CS transition.  
5. To access RAM, CS = VL, UB or LB = VIL, SEM = VIH. To access semaphore, CS = VIH, SEM = VIL.  
08.15.02 Rev 2  
All data sheets are subject to change without notice 10  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
1,3,4,5  
FIGURE 3. TIMING WAVEFORM OF READ CYCLE NO. 3, EITHER SIDE  
FIGURE 4. TIMING WAVEFORM OF READ WITH BUSY 2,3,4 (FOR MASTER)  
1. To ensure math, the earlier of the two ports wins.  
2. Write cycle parameters should be adhered to, to ensure proper writing.  
3. Device is continuously enable for both ports.  
4. OE = L for the reading port.  
08.15.02 Rev 2  
All data sheets are subject to change without notice 11  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
FIGURE 5. TIMING WAVEFORM OF WRITE WITH PORT-TO-PORT 1,2,3 (FOR SLAVE ONLY)  
1. Assume BUSY Input = H or the writing port, and OE = L for the reading port.  
2. Write cycle parameters should be adhered to, to ensure proper writing.  
3. Device is continuously enable for both ports.  
1,2,3,7  
FIGURE 6. TIMING WAVEFORM OF WRITE CYCLE NO. 1, R/W CONTROLLED TIMING  
08.15.02 Rev 2  
All data sheets are subject to change without notice 12  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
1,2,3,5  
FIGURE 7. TIMING WAVEFORM OF WRITE CYCLE NO. 2, CS CONTROLLED TIMING  
FIGURE 8. TIMING WAVEFORM OF WRITE WITH BUSY (FOR SLAVE)  
1. R/W must be high during all address transitions.  
2. A write occurs during the overlap (tSW to tWF) of a low CS or SEM and a low R/W.  
3. T.WF is measured from the earlier of CS or R/W (or SEM or R/W) going high to the end of write cycle.  
4. During this period, the I/O pins are in the output state, and input signals must not be applied.  
5. If the CS or SEM low transition occurs simultaneously with or after the R/W low transition, the outputs remain in the  
high impedance state.  
6. Transitions measured = 500 mV from steady state with a 5 pF load (including scope and jig). This parameter is sam-  
ple and not 100% tested.  
7. If OE is low during a R/W controlled write cycle, the write pulse width must be the larger of two or (tWZ +tDW) to allow  
the I/O driver to turn off and data to be placed on the bus for the required tDW. If OE is high during an R/W controlled  
write cycle, this requirement does not apply and the write pulse can be as short as the specified tWP  
.
8. To access RAM, CS = VIL, SEM = VIH.  
9. To access upper byte, CS = VIL, UB = VIL, SEM = VIH.  
To access lower byte, CS = VIL, LB = VIL, SEM = VIH.  
08.15.02 Rev 2  
All data sheets are subject to change without notice 13  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
FIGURE 9. TIMING WAVEFORM OF CONTENTION CYCLE NO. 1, CS ARBITRATION (FOR MASTER)  
FIGURE 10. TIMING WAVEFORM OF CONTENTION CYCLE NO. 2, ADDRESS VALID ARBITRATION (FOR MASTER  
ONLY) 1  
LEFT ADDRESS VALID FIRST  
08.15.02 Rev 2  
All data sheets are subject to change without notice 14  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
RIGHT ADDRESS VALID FIRST  
1. CSL = CSR = VIL.  
1
FIGURE 11. WAVEFORM OF INTERRUPT TIMING  
SET ADDRESS  
CLEAR ADDRESS  
1. All timing is the same for left and right ports. Port “A” may be either the left or right port. Port “B” is the port opposite  
from “A”.  
2. See interrupt truth table.  
3. Timing depends on which enable signal is asserted last.  
4. Timing depends on which enable signal is de-asserted first.  
08.15.02 Rev 2  
All data sheets are subject to change without notice 15  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
FIGURE 12. 32-BIT MASTER/SLAVE DUAL-PORT MEMORY SYSTEMS  
1. No arbitration in Master/Slave. BUSY - IN inhibits write in Master/Slave.  
1
FIGURE 13. TIMING WAVEFORM OF SEMAPHORE READ AFTER WRITE TIMING, EITHER SIDE  
1. CS = VIH for the duration of the above timing (both write and read cycle).  
08.15.02 Rev 2  
All data sheets are subject to change without notice 16  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
1,3,4  
FIGURE 14. TIMING WAVEFORM OF SEMAPHORE CONTENTION  
1. DOR = DOL = VIL, CSR = CSL = VIH, semaphore Flag is released from both sides (reads as ones from both sides) at  
cycle start.  
2. Either side “A” = left and side “B” = right, or side “A” = right and side “B” = left.  
3. This parameter is measured from the point where R/WA or SEMA goes high until R/WB or SEMB goes high.  
4. If tSPS is violated, the semaphore will fall positively to one side or the other, but there is no guaranty which side will  
obtain the flag.  
08.15.02 Rev 2  
All data sheets are subject to change without notice 17  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
84 PIN RAD-PAK® FLAT PACKAGE  
SYMBOL  
DIMENSION  
MIN  
NOM  
MAX  
A
A1  
b
0.163  
0.113  
0.006  
0.004  
0.635  
0.176  
0.123  
0.189  
0.133  
0.014  
0.010  
0.665  
0.010  
c
0.006  
D
0.650  
D1  
e
0.500 BSC  
0.025 BSC  
0.070  
S1  
F1  
F2  
F3  
F4  
L
0.013  
0.540  
0.415  
0.412  
0.560  
--  
--  
0.545  
0.550  
0.425  
0.418  
0.570  
1.635  
1.615  
0.960  
0.420  
0.415  
0.565  
1.620  
L1  
L2  
N
1.595  
0.940  
1.600  
0.950  
84  
08.15.02 Rev 2  
All data sheets are subject to change without notice 18  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
Q84-01  
Note: All dimensions in inches  
Important Notice:  
These data sheets are created using the chip manufacturers published specifications. Maxwell Technologies verifies  
functionality by testing key parameters either by 100% testing, sample testing or characterization.  
The specifications presented within these data sheets represent the latest and most accurate information available to  
date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no  
responsibility for the use of this information.  
Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems  
without express written approval from Maxwell Technologies.  
Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Tech-  
nologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.  
08.15.02 Rev 2  
All data sheets are subject to change without notice 19  
©2002 Maxwell Technologies  
All rights reserved.  
(8K x 16-Bit) Dual Port RAM High-Speed CMOS  
7025E  
Product Ordering Options  
Model Number  
7025E  
RP  
Q
X
-XX  
Option Details  
Feature  
Access Time  
35 = 35 ns  
45 = 45 ns  
Monolithic  
Screening Flow  
S = Maxwell Class S  
B = Maxwell Class B  
I = Industrial (testing @ -55°C,  
+25°C, +125°C)  
E = Engineering (testing @ +25°C)  
Q = Quad Flat Pack  
Package  
RP = RAD-PAK® package  
Radiation Feature  
(8K x 16-Bit) Dual Port RAM High-  
Speed CMOS  
Base Product  
Nomenclature  
08.15.02 Rev 2  
All data sheets are subject to change without notice 20  
©2002 Maxwell Technologies  
All rights reserved.  

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