AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
FEATURES
GENERAL DESCRIPTION
Access time : 55 ns
Low power consumption:
Operating current : 30 mA (TYP.)
Standby current : 4 µA (TYP.)
Single 2.7V ~ 5.5V power supply
All outputs TTL compatible
Fully static operation
Tri-state output
Data retention voltage :1.5V (MIN.)
All products ROHS Compliant
Package : 32-pin 450 mil SOP;32-pin 600 mil P-DIP
32-pin 8mm x 20mm TSOP-I
32-pin 8mm x 13.4mm STSOP
36-ball 6mm x 8mm TFBGA
32-pin 400 mil TSOP-II
The AS6C4008 is a 4,194,304-bit low power
CMOS static random access memory organized as
524,288 words by 8 bits. It is fabricated using very
high performance, high reliability CMOS technology.
Its standby current is stable within the range of
operating temperature.
The AS6C4008 is well designed for very low power
system applications, and particularly well suited for
battery back-up non-volatile memory application.
The AS6C4008 op erates from a sing le p owe r
sup p ly of 2.7V~ 5.5Vand all inputs and outputs are
fully TTL compatible
PRODUCT FAMILY
Product
Family
AS6C4008
Operating
Temperature
-40 ~ +85 ℃
Vcc Range
2.7 ~ 5.5V
FUNCTIONAL BLOCK DIAGRAM
DECODER
DQ0-DQ7
I/O DATA
CIRCUIT
CE#
WE#
OE#
CONTROL
CIRCUIT
AUG/09, v 1.4
55ns
Power Dissipation
Standby(ISB1TYP.) Operating(Icc,TYP.)
4µA(LL)
30mA
PIN DESCRIPTION**
Vcc
Vss
A0-A18
Speed
512Kx8
MEMORY ARRAY
SYMBOL
DESCRIPTION
A0 - A18
Address Inputs
DQ0 – DQ7
Data Inputs/Outputs
CE#
Chip Enable Inputs
WE#
Write Enable Input
OE#
Output Enable Input
VCC
Power Supply
VSS
Ground
NC
No Connection
COLUMN I/O
Alliance Memory Inc
Page 1 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
PIN CONFIGURATION
1
32
Vcc
A16
2
31
A15
A14
3
30
A17
A12
4
29
WE#
A7
5
28
A13
27
A8
26
A9
AS6C4008
A18
A6
6
A5
7
A4
8
A3
9
A2
10
A1
11
22
CE#
A0
12
21
DQ7
DQ0
13
20
DQ6
DQ1
14
19
DQ5
DQ2
15
18
DQ4
Vss
16
17
DQ3
25
A11
24
OE#
23
A10
A11
A9
A8
A13
WE#
A17
A15
Vcc
A18
A16
A14
A12
A7
A6
A5
A4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
AS6C4008
OE#
A10
CE#
DQ7
DQ6
DQ5
DQ4
DQ3
Vss
DQ2
DQ1
DQ0
A0
A1
A2
A3
TSOP-I/STSOP
SOP/ P-DIP
A18
1
32
VCC
A16
2
31
A15
A14
3
30
A17
4
29
5
28
6
27
7
26
8
25
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
9
AS6C4008
10
24
23
11
22
12
21
13
20
14
19
15
18
16
17
W E#
A13
A8
A9
A11
OE#
A
A0
A1
NC
A3
A6
A8
A10
B
DQ4
A2
WE#
A4
A7
DQ0
CE#
C
DQ5
NC
A5
D
Vss
E
Vcc
F
DQ6
A18
A17
G
DQ7 OE# CE#
A16
A15
DQ3
A12
A13
A14
5
6
DQ7
DQ6
Vcc
Vss
DQ2
DQ5
DQ4
H
DQ3
TSOP-II
AUG/09, v 1.4
DQ1
Alliance Memory Inc
A
9
A10
1
2
A11
3
4
TFBGA
Page 2 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
ABSOLUTE MAXIMUM RATINGS*
PARAMETER
Terminal Voltage with Respect to VSS
SYMBOL
VTERM
RATING
-0.5 to 6.5
UNIT
V
0 to 70(C grade)
Operating Temperature
Co
TA
-40 to 85(I grade)
Storage Temperature
Power Dissipation
DC Output Current
Soldering Temperature (under 10 sec)
TSTG
PD
IOUT
Co
-65 to 150
1
50
260
TSOLDER
W
mA
Co
*Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress
rating only and functional operation of the device or any other conditions above those indicated in the operational sections of this
specification is not implied. Exposure to the absolute maximum rating conditions for extended period may affect device reliability.
TRUTH TABLE
MODE
Standby
Output Disable
Read
Write
CE#
H
L
L
L
OE#
X
H
L
X
WE#
X
H
H
L
SUPPLY CURRENT
ISB1
ICC,ICC1
ICC,ICC1
ICC,ICC1
I/O OPERATION
High-Z
High-Z
DOUT
DIN
Note: H = VIH, L = VIL, X = Don't care.
DC ELECTRICAL CHARACTERISTICS
PARAMETER
Supply Voltage
Input High Voltage
Input Low Voltage
Input Leakage Current
Output Leakage
Current
Output High Voltage
Output Low Voltage
SYMBOL
VCC
VIH*1
VIL*1
ILI
ILO
VOH
VOL
ICC
Average Operating
Power supply Current
ICC1
Standby Power
Supply Current
ISB1
TEST CONDITION
Vcc: 4.5 ~ 5.5V
Vcc: 2.7 ~ 4.5V
Vcc: 4.5 ~ 5.5V
Vcc: 2.7 ~ 4.5V
VCC ≧ VIN ≧ VSS
VCC ≧ VOUT ≧ VSS,
Output Disabled
IOH = -1mA
IOL = 2mA
Cycle time = Min.
- 55
CE# = 0.2V, II/O = 0mA
other pins at 0.2V or VCC - 0.2V
Cycle time = 1µs
CE# = 0.2V, II/O = 0mA
other pins at 0.2V or VCC - 0.2V
-LL
CE# ≧VCC - 0.2V
-LLE/-LLI
MIN.
2.7
2.4
TYP.
3.0
-
*3
MAX.
UNIT
5.5
V
VCC+0.3
V
2.2
-
VCC+0.3
V
- 0.2
-
0.8
V
- 0.2
-1
-
0.6
1
V
µA
-1
-
1
µA
2.4
-
-
0.4
V
V
-
30
60
mA
-
4
10
mA
-
4
4
50 *4
50 *4
µA
µA
Notes: 1. VIH(max) = VCC + 3.0V for pulse width less than 10ns. VIL(min) = VSS - 3.0V for pulse width less than 10ns.
2. Over/Undershoot specifications are characterized, not 100% tested.
3. Typical values are included for reference only and are not guaranteed or tested.
Typical valued are measured at VCC = VCC(TYP.) and TA = 25?
4. 25µA for special request
AUG/09, v 1.4
Alliance Memory Inc
Page 3 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
CAPACITANCE (TA = 25℃, f = 1.0MHz)
PARAMETER
Input Capacitance
Input/Output Capacitance
SYMBOL
CIN
CI/O
MIN.
-
MAX
6
8
UNIT
pF
pF
Note : These parameters are guaranteed by device characterization, but not production tested.
AC TEST CONDITIONS
0.2V to VCC - 0.2V
3ns
1.5V
CL = 30pF + 1TTL, IOH/IOL = -2mA/4mA
Input Pulse Levels
Input Rise and Fall Times
Input and Output Timing Reference Levels
Output Load
AC ELECTRICAL CHARACTERISTICS
(1) READ CYCLE
PARAMETER
Read Cycle Time
Address Access Time
Chip Enable Access Time
Output Enable Access Time
Chip Enable to Output in Low-Z
Output Enable to Output in Low-Z
Chip Disable to Output in High-Z
Output Disable to Output in High-Z
Output Hold from Address Change
SYM.
tRC
tAA
tACE
tOE
tCLZ*
tOLZ*
tCHZ*
tOHZ*
tOH
AS6C4008-55
MIN.
MAX.
55
55
55
30
10
5
20
20
10
-
UNIT
AS6C4008-55
MIN.
MAX.
55
50
50
0
45
0
25
0
5
20
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
(2) WRITE CYCLE
PARAMETER
Write Cycle Time
Address Valid to End of Write
Chip Enable to End of Write
Address Set-up Time
Write Pulse Width
Write Recovery Time
Data to Write Time Overlap
Data Hold from End of Write Time
Output Active from End of Write
Write to Output in High-Z
SYM.
tWC
tAW
tCW
tAS
tWP
tWR
tDW
tDH
tOW *
tWHZ*
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
*These parameters are guaranteed by device characterization, but not production tested.
AUG09 v1.4
Alliance Memory Inc
Page 4 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
TIMING WAVEFORMS
READ CYCLE 1 (Address Controlled) (1,2)
tRC
Address
tAA
Dout
tOH
Previous Data Valid
Data Valid
READ CYCLE 2 (CE# and OE# Controlled) (1,3,4,5)
tRC
Address
tAA
CE#
tACE
OE#
tCLZ
Dout
High-Z
tOLZ
tOE
tOH
tOHZ
tCHZ
Data Valid
High-Z
Notes :
1.WE# is high for read cycle.
2.Device is continuously selected OE# = low, CE# = low.
3.Address must be valid prior to or coincident with CE# = low,; otherwise tAA is the limiting parameter.
4.tCLZ, tOLZ, tCHZ and tOHZ are specified with CL = 5pF. Transition is measured ±500mV from steady state.
5.At any given temperature and voltage condition, t CHZ is less than tCLZ , tOHZ is less than tOLZ.
AUG09 v1.4
Alliance Memory Inc
Page 5 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
WRITE CYCLE 1 (WE# Controlled) (1,2,3,5,6)
tWC
Address
tAW
CE#
tCW
tAS
tWP
tWR
WE#
TOW
tWHZ
Dout
High-Z
(4)
tDW
Din
(4)
tDH
Data Valid
WRITE CYCLE 2 (CE# Controlled) (1,2,5,6)
tWC
Address
tAW
CE#
tAS
tWR
tWP
tCW
WE#
tWHZ
Dout
(4)
High-Z
tDW
Din
tDH
Data Valid
Notes :
1.WE#, CE# must be high during all address transitions.
2.A write occurs during the overlap of a low CE#, low WE#.
3.During a WE# controlled write cycle with OE# low, tWP must be greater than tWHZ + tDW to allow the drivers to turn off and data to be
placed on the bus.
4.During this period, I/O pins are in the output state, and input signals must not be applied.
5.If the CE# low transition occurs simultaneously with or after WE# low transition, the outputs remain in a high impedance state.
6.tOW and tWHZ are specified with CL = 5pF. Transition is measured ±500mV from steady state.
AUG09 v1.4
Alliance Memory Inc
Page 6 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
DATA RETENTION CHARACTERISTICS
PARAMETER
VCC for Data Retention
Data Retention Current
Chip Disable to Data
Retention Time
Recovery Time
tRC* = Read Cycle Time
SYMBOL TEST CONDITION
VDR
CE# ≧ VCC - 0.2V
VCC = 1.5V
-LL
IDR
CE# ≧ VCC - 0.2V -LLE/-LLI
See Data Retention
tCDR
Waveforms (below)
tR
MIN.
1.5
-
TYP.
2
2
MAX.
5.5
30
30
UNIT
V
µA
µA
0
-
-
ns
tRC*
-
-
ns
DATA RETENTION WAVEFORM
VDR ≧ 1.5V
Vcc(min.)
Vcc(min.)
Vcc
tCDR
VIH
tR
CE# ≧ Vcc-0.2V
VIH
CE
#
AUG09 v1.4
Alliance Memory Inc
Page 7 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
PACKAGE OUTLINE DIMENSION
32 pin 450 mil SOP Package Outline Dimension
UNIT
SYM.
A
A1
A2
b
c
D
E
E1
e
L
L1
S
y
Θ
AUG09 v1.4
INCH.(BASE)
MM(REF)
0.118 (MAX)
0.004(MIN)
0.111(MAX)
0.016(TYP)
0.008(TYP)
0.817(MAX)
0.445 ±0.005
0.555 ±0.012
0.050(TYP)
0.0347 ±0.008
0.055 ±0.008
0.026(MAX)
0.004(MAX)
o
o
0 -10
2.997 (MAX)
0.102(MIN)
2.82(MAX)
0.406(TYP)
0.203(TYP)
20.75(MAX)
11.303 ±0.127
14.097 ±0.305
1.270(TYP)
0.881 ±0.203
1.397 ±0.203
0.660 (MAX)
0.101(MAX)
o
o
0 -10
Alliance Memory Inc
Page 8 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
32 pin 8mm x 20mm TSOP-I Package Outline Dimension
UNIT
SYM.
A
A1
A2
b
c
D
E
e
HD
L
L1
y
Θ
AUG09 v1.4
INCH(BASE)
MM(REF)
0.047 (MAX)
0.004 ±0.002
0.039 ±0.002
0.008 + 0.002
- 0.001
0.005 (TYP)
0.724 ±0.004
0.315 ±0.004
0.020 (TYP)
0.787 ±0.008
0.0197 ±0.004
0.0315 ±0.004
0.003 (MAX)
o
o
0 ~5
1.20 (MAX)
0.10 ±0.05
1.00 ±0.05
0.20 + 0.05
-0.03
0.127 (TYP)
18.40 ±0.10
8.00 ±0.10
0.50 (TYP)
20.00 ±0.20
0.50 ±0.10
0.08 ±0.10
0.076 (MAX)
o
o
0 ~5
Alliance Memory Inc
Page 9 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
32 pin 8mm x 13.4mm STSOP Package Outline Dimension
HD
cL
12° (2x)
32
16
17
12° (2x)
b
E
e
1
"A"
Seating Plane
D
y
12° (2X)
16
17
0.254
c
A2
A
GAUGE PLANE
A1
0
SEATING PLANE
L
12° (2X)
L1
"A" DETAIL VIEW
1
32
UNIT
SYM.
A
A1
A2
b
c
D
E
e
HD
L
L1
y
Θ
AUG09 v1.4
INCH(BASE)
MM(REF)
0.049 (MAX)
0.005 ±0.002
0.039 ±0.002
0.008 ±0.01
0.005 (TYP)
0.465 ±0.004
0.315 ±0.004
0.020 (TYP)
0.528±0.008
0.0197 ±0.004
0.0315 ±0.004
0.003 (MAX)
o
o
0 ~5
1.25 (MAX)
0.130 ±0.05
1.00 ±0.05
0.20±0.025
0.127 (TYP)
11.80 ±0.10
8.00 ±0.10
0.50 (TYP)
13.40 ±0.20.
0.50 ±0.10
0.8 ±0.10
0.076 (MAX)
o
o
0 ~5
Alliance Memory Inc
Page 10 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
36 ball 6mm × 8mm TFBGA Package Outline Dimension
AUG09 v1.4
Alliance Memory Inc
Page 11 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
32-pin 400mil TSOP-Ⅱ Package Outline Dimension
AUG/09, v 1.0.a
Alliance Memory Inc
Page 12 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
32 pin 600 mil P-DIP Package Outline Dimension
UNIT
SYM.
A1
A2
B
D
E
E1
e
eB
L
S
Q1
INCH(BASE)
MM(REF)
0.015 (MIN)
0.155 ± 0.005
0.018 ± 0.005
1.650 ± 0.005
0.600 ± 0.010
0.545 ± 0.005
0.100 (TYP)
0.640 ± 0.020
0.130 ± 0.010
0.075 ± 0.010
0.070 ± 0.005
0.381 (MIN)
3.937 ± 0.127
0.457 ± 0.127
41.910 ± 0.127
15.240 ± 0.254
13.843 ± 0.127
2.540 (TYP)
16.256 ± 0.508.
3.302 ± 0.254
1.905 ± 0.254
1.778 ± 0.127
Note : D/E1/S dimension do not include mold flash.
AUG09 v1.4
Alliance Memory Inc
Page 13 of 14
AUGUST 2009
AS6C4008
512K X 8 BIT LOW POWER CMOS SRAM
ORDERING INFORMATION
Alliance
Organization VCC
Package
AS6C4008-55PCN 512k x 8
5V
32pin 600mil DIP
AS6C4008-55SIN
512k x 8
5V
32pin 450mil SOP
AS6C4008-55TIN
512k x 8
5V
32pin TSOP 1 (8 x 20 mm)
AS6C4008-55STIN 512k x 8
5V
32pin sTSOP (8 x 13.4 mm)
AS6C4008-55BIN
512k x 8
5V
36pin TFBGA (6mm x 8mm)
AS6C4008-55ZIN
512k x 8
5V
32-pin 400mil TSOP 11
Operating
Temp
Commercial ~
0º C to 70º C
Industrial ~
-40ºC to 85º C
Industrial ~
-40ºC to 85º C
Industrial ~
-40ºC to 85º C
Industrial ~
-40ºC to 85º C
Industrial ~
-40ºC to 85º C
Speed
ns
55
55
55
55
55
55
PART NUMBERING SYSTEM
AS6C
4008
- 55
X
Package Options:
P = 32 pin 600 mil P-DIP
S = 32 pin 450 mil SOP
T = 32 pin TSOP 1 (8mm x 20 mm)
low Device
Z = 32-pin 400mil TSOP 11
power Number
SRAM 40 = 4M Access ST = 32 pin sTSOP (8mm x 13.4 mm)
prefix 08 = by 8 Time B = 36 pin TFBGA (6mm x 8mm)
AUG09 v1.4
Alliance Memory Inc
X
N
Temperature Range:
C = Commercial
N = Lead
(0ºC to +70º C)
Free ROHS
I = Industrial
Compliant
(-40º to +85º C)
Part
Page 14 of 14