CY62148ESL MoBL
®
4-Mbit (512 K × 8) Static RAM
4-Mbit (512 K × 8) Static RAM
Features
■
■
■
Functional Description
The CY62148ESL is a high performance CMOS static RAM
organized as 512 K words by 8-bits. This device features
advanced circuit design to provide ultra low active current. This
is ideal for providing More Battery Life™ (MoBL
) in portable
applications such as cellular telephones. The device also has an
automatic power-down feature that significantly reduces power
consumption. Placing the device in standby mode reduces
power consumption by more than 99 percent when deselected
(CE HIGH). The eight input and output pins (I/O
0
through I/O
7
)
are placed in a high impedance state when the device is
deselected (CE HIGH), the outputs are disabled (OE HIGH), or
during a write operation (CE LOW and WE LOW).
To write to the device, take Chip Enable (CE) and Write Enable
(WE) inputs LOW. Data on the eight I/O pins (I/O
0
through I/O
7
)
is then written into the location specified on the address pins (A
0
through A
18
).
To read from the device, take Chip Enable (CE) and Output
Enable (OE) LOW while forcing Write Enable (WE) HIGH. Under
these conditions, the contents of the memory location specified
by the address pins appear on the I/O pins.
Higher speed up to 55 ns
Wide voltage range: 2.2 V to 3.6 V and 4.5 V to 5.5 V
Ultra low standby power
❐
Typical standby current: 1 µA
❐
Maximum standby current: 7 µA
Ultra low active power
❐
Typical active current: 2 mA at f = 1 MHz
Easy memory expansion with CE and OE features
Automatic power-down when deselected
Complementary metal oxide semiconductor (CMOS) for
optimum speed and power
Available in Pb-free 32-Pin shrunk thin small outline package
(STSOP) package
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■
■
■
■
Logic Block Diagram
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
CE
WE
OE
INPUT BUFFER
ROW DECODER
I/O
IO0
0
I/O
IO1
1
SENSE AMPS
I/O
IO2
2
I/O
IO3
3
I/O
IO4
4
I/O
IO5
5
I/O
IO6
6
I/O
512K x 8
ARRAY
COLUMN DECODER
POWER
DOWN
IO7
7
A13
A14
A15
A16
A17
A18
Cypress Semiconductor Corporation
Document #: 001-50045 Rev. *D
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Revised June 29, 2011
CY62148ESL MoBL
®
Contents
Features ............................................................................. 1
Functional Description ..................................................... 1
Pin Configuration ............................................................. 3
Product Portfolio .............................................................. 3
Maximum Ratings ............................................................. 4
Operating Range ............................................................... 4
Electrical Characteristics ................................................. 4
Capacitance ...................................................................... 5
Thermal Resistance .......................................................... 5
Data Retention Characteristics ....................................... 6
Switching Characteristics ................................................ 7
Switching Waveforms ...................................................... 8
Truth Table ........................................................................ 9
Ordering Information ...................................................... 10
Ordering Code Definitions ............................................. 10
Package Diagram ............................................................ 11
Acronyms ........................................................................ 12
Document Conventions ................................................. 12
Units of Measure ....................................................... 12
Document History Page ................................................. 13
Sales, Solutions, and Legal Information ...................... 14
Worldwide Sales and Design Support ....................... 14
Products .................................................................... 14
PSoC Solutions ......................................................... 14
Document #: 001-50045 Rev. *D
Page 2 of 14
CY62148ESL MoBL
®
Pin Configuration
Figure 1. 32-Pin STSOP (Top View)
A
11
A
9
A
8
A
13
WE
A
17
A
15
V
CC
A
18
A
16
A
14
A
12
A
7
A
6
A
5
A
4
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
OE
A
10
CE
I/O
7
I/O
6
I/O
5
I/O
4
I/O
3
GND
I/O
2
I/O
1
I/O
0
A
0
A
1
A
2
A
3
STSOP
Top View
(not to scale)
Product Portfolio
Power Dissipation
Product
Range
V
CC
Range (V)
[1]
Speed
(ns)
Operating I
CC
, (mA)
f = 1 MHz
Typ
[2]
CY62148ESL
Industrial/
2.2 V to 3.6 V and 4.5 V to 5.5 V
Automotive-A
55
2
Max
2.5
f = f
max
Typ
[2]
15
Max
20
Standby, I
SB2
(µA)
Typ
[2]
1
Max
7
Notes
1. Datasheet specifications are not guaranteed for V
CC
in the range of 3.6 V to 4.5 V.
2. Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at V
CC
= V
CC(typ)
, T
A
= 25 °C.
Document #: 001-50045 Rev. *D
Page 3 of 14
CY62148ESL MoBL
®
Maximum Ratings
Exceeding maximum ratings may shorten the useful life of the
device. User guidelines are not tested.
Storage temperature ................................. –65 °C to +150 °C
Ambient temperature with power applied.... 55 °C to +125 °C
Supply voltage to ground potential................. –0.5 V to 6.0 V
DC voltage applied to outputs
in high Z state
[3, 4]
......................................... –0.5 V to 6.0 V
DC input voltage
[3, 4]
..................................... –0.5 V to 6.0 V
Output current into outputs (low)..................................20 mA
Static discharge voltage .......................................... > 2001 V
(MIL-STD-883, Method 3015)
Latch-up current......................................................> 200 mA
Operating Range
Device
CY62148ESL
Range
Ambient
Temperature
V
CC
[5]
Industrial/ –40 °C to +85 °C 2.2 V to 3.6 V,
Automotive-A
and 4.5 V to
5.5 V
Electrical Characteristics
Over the operating range
Parameter
V
OH
Description
Output HIGH voltage
2.2 < V
CC
< 2.7
2.7 < V
CC
< 3.6
4.5 < V
CC
< 5.5
V
OL
Output LOW voltage
2.2 < V
CC
< 2.7
2.7 < V
CC
< 3.6
4.5 < V
CC
< 5.5
V
IH
Input HIGH voltage
2.2 < V
CC
< 2.7
2.7 < V
CC
< 3.6
4.5 < V
CC
< 5.5
V
IL [7]
Input LOW voltage
2.2 < V
CC
< 2.7
2.7 < V
CC
< 3.6
4.5 < V
CC
< 5.5
I
IX
I
OZ
I
CC
I
SB1
[8]
Test Conditions
I
OH
= –0.1 mA
I
OH
= –1.0 mA
I
OH
= –1.0 mA
I
OL
= 0.1 mA
I
OL
= 2.1 mA
I
OL
= 2.1 mA
55 ns (Industrial/Automotive-A)
Min
2.0
2.4
2.4
–
–
–
1.8
2.2
2.2
–0.3
–0.3
–0.5
–1
–1
–
–
–
–
–
–
1
7
Typ
[6]
–
–
–
–
–
–
–
–
–
–
–
–
–
–
15
2
1
Max
–
–
–
0.4
0.4
0.4
V
CC
+ 0.3
V
CC
+ 0.3
V
CC
+ 0.5
0.4
0.6
0.6
+1
+1
20
2.5
7
Unit
V
V
V
V
Input leakage current
V
CC
operating supply
current
GND < V
I
< V
CC
f = f
max
= 1/t
RC
f = 1 MHz
V
CC
= V
CCmax
I
OUT
= 0 mA, CMOS levels
µ
A
µ
A
Output leakage current GND < V
O
< V
CC
, output disabled
mA
µ
A
I
SB2[8]
Automatic CE
CE > V
CC
–0.2 V, V
IN
> V
CC
– 0.2 V or V
IN
< 0.2 V,
power-down current — f = f
max
(address and data only), f = 0 (OE and WE),
CMOS inputs
V
CC
= V
CC(max)
Automatic CE
CE > V
CC
– 0.2 V, V
IN
> V
CC
– 0.2 V or V
IN
< 0.2 V,
power-down current — f = 0, V
CC
= V
CC(max)
CMOS inputs
µ
A
Notes
3. V
IL
(min) = –2.0 V for pulse durations less than 20 ns.
4. V
IH
(max) = V
CC
+ 0.75 V for pulse durations less than 20 ns.
5. Full device AC operation assumes a minimum of 100 µs ramp time from 0 to V
CC
(min) and 200 µs wait time after V
CC
stabilization.
6. Typical values are included for reference and are not guaranteed or tested. Typical values are measured at V
CC
= V
CC
(typ), T
A
= 25 °C.
7. Under DC conditions the device meets a V
IL
of 0.8 V (for V
CC
range of 2.7 V to 3.6 V and 4.5 V to 5.5 V) and 0.6 V (for V
CC
range of 2.2 V to 2.7 V). However, in
dynamic conditions Input LOW voltage applied to the device must not be higher than 0.6 V and 0.4 V for the above ranges. Refer to
AN13470
for details.
8. Chip enable (CE) must be HIGH at CMOS level to meet the I
SB1
/ I
SB2
/ I
CCDR
spec. Other inputs can be left floating.
Document #: 001-50045 Rev. *D
Page 4 of 14
CY62148ESL MoBL
®
Capacitance
Parameter
[9]
C
IN
C
OUT
Description
Input capacitance
Output capacitance
Test Conditions
T
A
= 25 °C, f = 1 MHz,
V
CC
= V
CC
(Typ)
Max
10
10
Unit
pF
pF
Thermal Resistance
Parameter
[9]
JA
JC
Description
Thermal resistance
(junction to ambient)
Thermal resistance
(junction to case)
Figure 2. AC Test Loads and Waveforms
R1
V
CC
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
R2
V
CC
GND
Rise Time = 1 V/ns
10%
ALL INPUT PULSES
90%
90%
10%
Fall Time = 1 V/ns
Test Conditions
Still air, soldered on a 3 × 4.5 inch, two-layer printed
circuit board
STSOP
49.02
14.07
Unit
C/W
C/W
Equivalent to:
THEVENIN
EQUIVALENT
R
TH
OUTPUT
V
Parameter
R1
R2
R
TH
V
TH
2.5 V
16667
15385
8000
1.20
3.0 V
1103
1554
645
1.75
5.0 V
1800
990
639
1.77
Unit
V
Notes
9. Tested initially and after any design or process changes that may affect these parameters.
Document #: 001-50045 Rev. *D
Page 5 of 14
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