AS7C25512NTF32A ALSC [Alliance Semiconductor Corporation], AS7C25512NTF32A Datasheet

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AS7C25512NTF32A

Manufacturer Part Number
AS7C25512NTF32A
Description
2.5V 512K x 32/36 Flowthrough Synchronous SRAM with NTD
Manufacturer
ALSC [Alliance Semiconductor Corporation]
Datasheet
Logic block diagram
Selection guide
Features
• Organization: 524,288 words × 32 or 36 bits
• NTD
• Fast clock to data access: 7.5/8.5/10 ns
• Fast OE access time: 3.5/4.0 ns
• Fully synchronous operation
• Flow-through mode
• Asynchronous output enable control
• Available in 100-pin TQFP package
• Individual byte write and global write
Minimum cycle time
Maximum clock access time
Maximum operating current
Maximum standby current
Maximum CMOS standby current (DC)
April 2005
4/21/05, v 1.2
architecture for efficient bus operation
2.5V 512K × 32/36 Flowthrough Synchronous SRAM with NTD
A[18:0]
CE1
CE2
CE0
DQ[a,b,c,d]
ADV / LD
BWb
BWd
BWa
BWc
LBO
R/W
ZZ
CLK
CEN
32/36
19
D
D
Control
Burst logic
Address
Register
register
logic
CLK
Input
Data
CLK
Alliance Semiconductor
275
-75
8.5
7.5
90
60
CLK
Q
Q
• Clock enable for operation hold
• Multiple chip enables for easy expansion
• 2.5V core power supply
• Self-timed write cycles
• Interleaved or linear burst modes
• Snooze mode for standby operation
19
OE
32/36
addr. registers
D
CLK
Write delay
®
250
-85
8.5
10
80
60
32/36
Q
OE
32/36
CLK
Output
Buffer
32/36
512K x 32/36
DQ[a,b,c,d]
19
SRAM
32/36
Array
Copyright © Alliance Semiconductor. All rights reserved.
AS7C25512NTF32A
AS7C25512NTF36A
230
-10
10
80
60
12
TM
P. 1 of 18
Units
mA
mA
mA
ns
ns

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AS7C25512NTF32A Summary of contents

Page 1

... CLK D Write delay addr. registers CLK Control logic CLK 32/36 32/36 Data D Q Input Register CLK OE -75 -85 8.5 10 7.5 8.5 275 250 Alliance Semiconductor AS7C25512NTF32A AS7C25512NTF36A CLK 512K x 32/36 SRAM Array 32/36 32/36 32/36 Output Buffer OE 32/36 DQ[a,b,c,d] -10 Units 230 Copyright © Alliance Semiconductor. All rights reserved. ...

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 AS7C25512NTF32A/36A 3 Speed 166/133 MHz 166/133 MHz 166/133 MHz 166/133 MHz 166/133 MHz 166/133 MHz 7.5/8.5/10 ns 7.5/8.5/10 ns 7.5/8.5/10 ns 166/133 MHz 166/133 MHz 166/133 MHz 7.5/8.5/10 ns 7.5/8.5/10 ns 7.5/8.5/ ...

Page 3

... DQd5 V 26 SSQ V 27 DDQ 28 DQd6 29 DQd7 30 NC/DQPd Note: For pins 1, 30, 51, and 80, NC applies to the x32 configuration. DQPn applies to the x36 configuration. 4/21/05, v 1.2 ® TQFP 14 x 20mm Alliance Semiconductor AS7C25512NTF32A/36A 80 DQPb/NC 79 DQb7 78 DQb6 77 V DDQ 76 V SSQ 75 DQb5 74 DQb4 73 DQb3 72 DQb2 ...

Page 4

... Functional Description The AS7C25512NTF32A/36A family is a high performance CMOS 16 Mbit synchronous Static Random Access Memory (SRAM) organized as 524,288 words × bits and incorporates a LATE Write. This variation of the 16Mb+ synchronous SRAM uses the No Turnaround Delay (NTD write operation that improves bandwidth over flowthrough burst devices normal flowthrough burst device, the write data, command, and address are all applied to the device on the same clock edge ...

Page 5

... DESELECT or READ cycle should be given while the SRAM is transitioning out of SNOOZE MODE. PUS 4/21/05, 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 SB2 ZZI Alliance Semiconductor AS7C25512NTF32A/36A . The duration of SB2 ...

Page 6

... External NOP/WRITE ABORT (Begin Burst) High Next Current enables WRITEs to byte “b” (DQb pins); Alliance Semiconductor AS7C25512NTF32A/36A Linear burst order (LBO = ...

Page 7

... V DD DDQ OUT T stg T bias Symbol Min Nominal V 2.375 2 2.375 2.5 DDQ Vss 0 0 Alliance Semiconductor AS7C25512NTF32A/36A Burst Dsel Burst Burst Min Max Unit –0.3 +3.6 –0 0.3 DD –0 0.3 DDQ – 1.8 – –65 +150 o –65 +135 Max Unit 2 ...

Page 8

... Deselected < Max Deselected < 0.2V, I SB1 ≤ 0.2V or ≥ V all ≥ V Deselected Max I SB2 ≤ ≥ V all Alliance Semiconductor AS7C25512NTF32A/36A Min Max < < OUT DDQ 1.7* V +0.3 DD 1.7* V DDQ -0.3** 0.7 -0.3** 0.7 1.7 – 2.0 – ...

Page 9

... CSH t 2.0 – 2.0 CENS t 0.5 – 0.5 CENH t 2.0 – 2.0 ADVS t 0.5 – 0.5 ADVH Conditions Symbol ZZ > SB2 t PDS t PUS t ZZI t RZZI Alliance Semiconductor AS7C25512NTF32A/36A -10 1 Min Max Unit Notes – 12 – ns – – 4.0 ns – 2.5 – ns 2,3,4 – 3.0 – – 0 – ns 2,3,4 – 4.0 ns 2,3,4 – 4.0 ...

Page 10

... Falling input HZOE OE Q(A1) Q(A2) Q(A2Y‘01) Read Continue Continue Continue Q(A2) Read Read Q(A2Y‘10) Q(A2Y‘01) Q(A2Y‘11) Alliance Semiconductor AS7C25512NTF32A/36A Undefined t CYC A3 Q(A2Y‘10) Q(A3) Q(A2Y‘11) Continue Inhibit Read Read Read Clock Q(A3) Q(A3Y‘01 HLZC ...

Page 11

... HZOE Dout Q(n-2) Q(n-1) Write DSEL D(A1) 4/21/05, v 1.2 ® D(A1) D(A2) D(A2Y‘01) Write Continue Continue Continue D(A2) Write Write Write D(A2Y‘10) D(A2Y‘01) D(A2Y‘11) Alliance Semiconductor AS7C25512NTF32A/36A t CYC D(A3) D(A2Y‘10) D(A2Y‘11) Continue Inhibit Write Write Clock D(A3) D(A3Y‘01 ...

Page 12

... Note: Ý = XOR when LBO = high/no connect. Ý = ADD when LBO = low. BW[a:d] is don’t care. 4/21/05, v 1.2 ® LZC OH D(A1) D(A2) Q(A3) D(A2Ý01) Burst Burst Read Read Write Read Q(A3) Q(A4) D(A2Ý01) Q(A4Ý01) Alliance Semiconductor AS7C25512NTF32A/36A t CYC HZC D(A5) Q(A6) Q(A4) Q(A4Ý01) t HZOE t LZOE Write Read Write D(A5) Q(A6) D(A7 DSEL ...

Page 13

... Address A1 D/Q Command Read Burst Q(A1) Q(A1Ý01) Note: Ý = XOR when LBO = high/no connect; Ý = ADD when LBO = low low. 4/21/05, v 1.2 ® A2 Q(A1Ý01) Q(A1) Q(A1Ý10) STALL Burst DSEL Burst Q(A1Ý10) DSEL Alliance Semiconductor AS7C25512NTF32A/36A A3 D(A2) Burst Write Write Burst NOP NOP D(A2) D(A2Ý10) D(A2Ý01) D(A3 ...

Page 14

... Timing waveform of snooze mode CLK ZZ setup cycle ZZ t ZZI I supply I SB2 All inputs Deselect or Read Only (except ZZ) Dout 4/21/05, v 1.2 ® t PUS ZZ recovery cycle t RZZI Deselect or Read Only High-Z Alliance Semiconductor AS7C25512NTF32A/36A Normal operation Cycle ...

Page 15

... Figure C. For all others, see Figure B. HZC 50Ω DDQ 30 pF* Figure B: Output load (A) at any given temperature and voltage. LZC IL Alliance Semiconductor AS7C25512NTF32A/36A Thevenin equivalent: +2.5V 319Ω/1667Ω OUT 5 pF* 353Ω/1538Ω GND *including scope and jig capacitance Figure C: Output load(B) ...

Page 16

... 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 4/21/05, v 1.2 ® Alliance Semiconductor AS7C25512NTF32A/36A b e α ...

Page 17

... Ordering information Package & Width AS7C25512NTF32A-75TQC TQFP x32 AS7C25512NTF32A-75TQI AS7C25512NTF36A-75TQC TQFP x36 AS7C25512NTF36A-75TQI Notes: Add suffix ‘N’ to the above part number for Lead Free Parts (Ex. AS7C25512NTF32A-85TQCN) Part numbering guide AS7C 25 512 Alliance Semiconductor SRAM prefix 2. Operating voltage 2.5V 3. Organization: 512 = 512k 4 ...

Page 18

... 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. AS7C25512NTF32A/36A ® Copyright © Alliance Semiconductor All Rights Reserved Part Number: AS7C25512NTF32A AS7C25512NTF36A Document Version: v 1.2 ...

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