as7c252mft18a ETC-unknow, as7c252mft18a Datasheet

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as7c252mft18a

Manufacturer Part Number
as7c252mft18a
Description
Manufacturer
ETC-unknow
Datasheet
January 2005
Features
• Organization: 2,097152 words × 18 bits
• Fast clock to data access: 7.5/8.5/10 ns
• Fast OE access time: 3.5/4.0 ns
• Fully synchronous flow-through operation
• Asynchronous output enable control
• Available in 100-pin TQFP package
• Individual byte write and global write
Logic block diagram
Selection guide
Minimum cycle time
Maximum clock access time
Maximum operating current
Maximum standby current
Maximum CMOS standby current (DC)
1/17/05, v 1.2
A[20:0]
ADSC
ADSP
ADV
CLK
GWE
BWE
BW
BW
CE0
CE1
CE2
OE
ZZ
b
a
2.5V 2M × 18 Flow-through synchronous SRAM
Power
down
Alliance Semiconductor
21
CLK
CS
D
CLK
CS
CLR
D
D
D
D
CLK
CLK
CE
CLK
CLK
Byte Write
Byte Write
Address
register
registers
registers
register
register
Enable
Enable
delay
DQb
DQa
325
130
-75
8.5
7.5
90
Burst logic
Q
Q
Q
Q
Q
LBO
• Multiple chip enables for easy expansion
• 2.5V core power supply
• Linear or interleaved burst control
• Snooze mode for reduced power-standby
• Common data inputs and data outputs
21
®
19
21
OE
CLK
registers
300
130
-85
Output
8.5
10
90
2
18
2M x 18
Memory
18
DQ[a,b]
array
CLK
registers
18
Input
Copyright © Alliance Semiconductor. All rights reserved.
AS7C252MFT18A
275
130
-10
10
12
90
1 of 19
Units
mA
mA
mA
ns
ns

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as7c252mft18a Summary of contents

Page 1

... CLK D Q DQa Byte Write registers CLK D Q Enable register CE CLK D Q Enable Power delay down register CLK -75 8.5 7.5 325 130 90 Alliance Semiconductor AS7C252MFT18A Memory 21 array Input Output registers registers CLK CLK 18 DQ[a,b] -85 - 8.5 10 300 275 130 130 90 ...

Page 2

... Mode PL-SCD PL-SCD PL-SCD PL-DCD PL-DCD PL-DCD NTD-PL NTD-PL NTD-PL NTD-FT NTD-FT NTD- Alliance Semiconductor AS7C252MFT18A Speed 200/166/133 MHz 200/166/133 MHz 200/166/133 MHz 200/166/133 MHz 200/166/133 MHz 200/166/133 MHz 7.5/8.5/10 ns 7.5/8.5/10 ns 7.5/8.5/10 ns 200/166/133 MHz 200/166/133 MHz 200/166/133 MHz 7.5/8.5/10 ns 7.5/8.5/10 ns 7.5/8.5/ ...

Page 3

... V 20 DDQ V 21 SSQ DQb6 22 DQb7 23 24 DQPb SSQ V 27 DDQ 1/17/05, v 1.2 ® TQFP 14 x 20mm Alliance Semiconductor AS7C252MFT18A DDQ 76 V SSQ DQPa DQa7 73 72 DQa6 V 71 SSQ 70 V DDQ 69 DQa5 68 DQa4 ...

Page 4

... WE signals are sampled on the clock edge that samples ADSC low (and ADSP high). • Master chip enable CE0 blocks ADSP, but not ADSC. The AS7C252MFT18A family operates from a core 2.5V power supply. These devices are available in 100-pin TQFP package. TQFP capacitance ...

Page 5

... DESELECT or READ cycle should be given while the SRAM is transitioning out of SNOOZE MODE. PUS 1/17/05, v 1.2 ® Description or left floating, device follows interleaved Burst order. When DD is guaranteed after the time t is met. After entering SNOOZE MODE, all inputs except ZZ is SB2 ZZI Alliance Semiconductor AS7C252MFT18A . The duration of SB2 ...

Page 6

... Address Address Address Address Alliance Semiconductor AS7C252MFT18A ...

Page 7

... Alliance Semiconductor AS7C252MFT18A CLK Operation Deselect Deselect Deselect Deselect Deselect External Begin read External Begin read External ...

Page 8

... DDQ OUT T stg T bias Symbol Min Nominal V 2.375 2 2.375 2.5 DDQ Vss 0 0 Alliance Semiconductor AS7C252MFT18A Min Max Unit –0.3 +3.6 –0 0.3 DD –0 0.3 DDQ – 1.8 – –65 +150 –65 +135 Max Unit 2.625 V 2.625 ...

Page 9

... Deselected < Max Deselected < 0.2V, I SB1 ≤ 0.2V or ≥ V all ≥ V Deselected Max I SB2 ≤ ≥ V all Alliance Semiconductor AS7C252MFT18A Min Max < < OUT DDQ 1.7* V +0.3 DD 1.7* V DDQ -0.3** 0.7 -0.3** 0.7 1.7 – – ...

Page 10

... ADSPS t 2.0 – 2.0 ADSCS t 0.5 – 0.5 ADVH t 0.5 – 0.5 ADSPH t 0.5 – 0.5 ADSCH Conditions Symbol ZZ > SB2 t PDS t PUS t ZZI t RZZI Alliance Semiconductor AS7C252MFT18A –10 Max Min Max Unit Notes – 12 – ns 8.5 – 4.0 – 4.0 ns – 2.5 – ns 2,3,4 – 2.5 – ns – 0 – ns 2,3,4 4.0 – 4.0 ns 2,3,4 5.0 – ...

Page 11

... ADV inserts wait states t HZOE t OH Q(A2Ý01) Q(A2Ý10) Q(A2Ý11 Read Burst Burst Suspend Burst Q(A2) Read Read Read Read Q(A 2Ý01 ) Q(A 2Ý10 ) Q(A 2Ý10 ) Q(A 2Ý11 ) Alliance Semiconductor AS7C252MFT18A A3 Q(A3) Q(A3Ý01) Q(A3Ý11) Q(A3Ý10) t HZC Read Burst Burst Burst Q(A3) Read Read Read DSEL Q(A 3Ý01 ) Q(A 3Ý10 ) Q(A 3Ý11 ) Undefined ...

Page 12

... CYC t CL ADSC LOADS NEW ADDRESS A2 ADV SUSPENDS BURST D(A2) D(A2Ý01) D(A2Ý01) Read Suspend ADV Suspend Write Q(A2) Write Burst Write D D(A 2Ý01 ) D(A1) Write D(A 2Ý01 ) Alliance Semiconductor AS7C252MFT18A t ADSCS t ADSCH ADVS t ADVH D(A2Ý10) D(A2Ý11) D(A3) D(A3Ý01) D(A3Ý10) ADV ADV Write ...

Page 13

... ADVS t ADVH D(A2 HZOE LZOE Q(A3) Suspend Read Suspend Read Read Q(A2) Write Q(A3) Q(A1) D Alliance Semiconductor AS7C252MFT18A t OH Q(A3Ý01) Q(A3Ý10) Q(A3Ý11) ADV ADV ADV Suspend Burst Burst Burst Read Read Read Read Q(A 3Ý11 ) Q(A 3Ý01 ) Q(A 3Ý10 ) Q(A 3Ý ...

Page 14

... Dout Din READ READ Q(A1) Q(A2) Note: ADV is don’t care here. 1/17/05, v 1.2 ® t CYC HZOE Q(A3) Q(A4 D(A5) D(A6) D(A7) READ WRITE READ WRITE Q(A3) D(A6) Q(A4) D(A5) Alliance Semiconductor AS7C252MFT18A A10 Q(A9) Q(A10) D(A8) READ WRITE WRITE READ Q(A10) D(A7) D(A8) Q(A9 ...

Page 15

... LZOE Din Dout Q(A1) t PDS ZZ ZZ Setup Cycle t ZZI I supply READ READ Q(A1) Q(A1Ý01) 1/17/05, v 1.2 ® HZC t PUS ZZ Recovery Cycle t RZZI I SB2 Sleep State Alliance Semiconductor AS7C252MFT18A t CYC HZOE Q(A2) Q(A2(Ý01)) Normal Operation Mode READ READ Q(A2) Q(A2Ý01 ...

Page 16

... DDQ OUT 30 pF* Figure B: Output load (A) at any given temperature and voltage. LZC is measured as low if below VIL. CL Alliance Semiconductor AS7C252MFT18A Thevenin equivalent: +2.5V 319Ω/1667Ω D OUT /2 5 pF* 353Ω/1538Ω GND *including scope and jig capacitance Figure C: Output load(B) ...

Page 17

... Package dimensions 100-pin quad flat pack (TQFP) TQFP Min Max A1 0.05 0.15 A2 1.35 1.45 b 0.22 0.38 c 0.09 0.20 D 13.90 14.10 E 19.90 20.10 e 0.65 nominal Hd 15.85 16.15 He 21.80 22.20 L 0.45 0.75 L1 1.00 nominal α 0° 7° Dimensions in millimeters 1/17/05, v 1.2 ® Alliance Semiconductor AS7C252MFT18A α ...

Page 18

... Ordering information Package & Width AS7C252MFT18A-75TQC TQFP x 18 AS7C252MFT18A-75TQI Note: Add suffix ‘N’ to the above part number for Lead Free Parts (Ex. AS7C252MFT18A-85TQCN) Part numbering guide AS7C 1.Alliance Semiconductor SRAM prefix 2.Operating voltage 2.5V 3.Organization 4.Flow-through mode 5.Organization 6.Production version first production version Clock access time: [-75 = 7.5 ns ...

Page 19

... Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use. AS7C252MFT18A ® Copyright © Alliance Semiconductor All Rights Reserved Part Number: AS7C252MFT18A Document Version: v 1.2 ...

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