WCMA4008C1X PDF даташит
Спецификация WCMA4008C1X изготовлена «Weida Semiconductor» и имеет функцию, называемую «512K x 8 Static RAM». |
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Детали детали
Номер произв | WCMA4008C1X |
Описание | 512K x 8 Static RAM |
Производители | Weida Semiconductor |
логотип |
10 Pages
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WCMA4008C1X
Features
• Voltage Range
— 4.5V–5.5V
• Low active power
— Typical active current: 2.5 mA @ f = 1 MHz
— Typical active current: 12.5 mA @ f = fmax
• Low standby current
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE and OE features
• CMOS for optimum speed/power
Functional Description
The WCMA4008C1X is a high-performance CMOS static
RAM organized as 512K words by 8 bits. Easy memory expan-
sion is provided by an active LOW Chip Enable (CE), an active
Logic Block Diagram
512K x 8 Static RAM
LOW Output Enable (OE), and three-state drivers. This device
has an automatic power-down feature that reduces power
consumption by more than 99% when deselected.
Writing to the device is accomplished by taking Chip Enable
(CE) and Write Enable (WE) inputs LOW. Data on the eight I/O
pins (I/O0 through I/O7) is then written into the location speci-
fied on the address pins (A0 through A18).
Reading from the device is accomplished by taking Chip En-
able (CE) and Output Enable (OE) LOW while forcing Write
Enable (WE) HIGH for read. Under these conditions, the con-
tents of the memory location specified by the address pins will
appear on the I/O pins.
The eight input/output pins (I/O0 through I/O7) 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).
The WCMA4008C1X is available in a standard 32-pin
450-mil-wide body width SOIC.
A0
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A4
A5
A6
A7
A12
A14
A16
A17
CE
WE
OE
INPUT BUFFER
512 x 256 x 8
ARRAY
COLUMN
DECODER
POWER
DOWN
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
Pin Configuration
Top View
SOIC
A17
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32 VCC
31 A15
30 A18
29 WE
28 A13
27 A8
26
25
A9
A11
24 OE
23 A10
22 CE
21 I/O7
20 I/O6
19 I/O5
18 I/O4
17 I/O3
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WCMA4008C1X
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ................................. –65°C to +150°C
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
Supply Voltage on VCC to Relative GND ....... –0.5V to +7.0V
DC Voltage Applied to Outputs
in High Z State[1] .....................................–0.5V to VCC +0.5V
DC Input Voltage[1]..................................–0.5V to VCC +0.5V
Current into Outputs (LOW) .........................................20 mA
Static Discharge Voltage...............................................2001V
(per MIL-STD-883, Method 3015)
Latch-Up Current .....................................................>200 mA
Product Portfolio
Power Dissipation
Product
WCMA4008C1X
Min.
4.5 V
VCC Range
Typ.
5.0V
Max.
5.5V
Speed Temp.
70 ns Ind’l
Operating, Icc
f = fmax
Typ.[3]
Max.
12.5 mA 20 mA
Standby (ISB2)
Typ.[2]
4 µA
Max.
20 µA
Operating Range
Range
Ambient
Temperature
Industrial
–40°C to +85°C
VCC
4.5V–5.5V
Notes:
1. VIL (min.) = –2.0V for pulse durations of less than 20 ns.
www.Da2ta. ShTeypeitc4aUl v.acloumes are measured at VCC = 5V, TA = 25°C, and are included for reference only and are not tested or guaranteed.
Page 2 of 10
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WCMA4008C1X
Electrical Characteristics Over the Operating Range
Parameter
Description
VOH Output HIGH Voltage
VOL Output LOW Voltage
VIH Input HIGH Voltage
VIL Input LOW Voltage
IIX Input Leakage Current
IOZ Output Leakage
Current
ICC VCC Operating
Supply Current
ISB1 Automatic CE
Power-Down Current
—TTL Inputs
ISB2 Automatic CE
Power-Down Current
—CMOS Inputs
Test Conditions
VCC = Min., IOH = – 1 mA
VCC = Min., IOL = 2.1 mA
GND ≤ VI ≤ VCC
GND ≤ VI ≤ VCC, Output Disabled
f = fMAX = 1/tRC
f = 1 MHz
IOUT =0 mA
VCC = Max.,
Max. VCC,CE ≥ VIH
VIN ≥ VIH or VIN ≤ VIL, f = fMAX
Max. VCC, CE ≥ VCC – 0.3V,
VIN ≥ VCC – 0.3V, or VIN ≤ 0.3V, f =0
WCMA4008C1X
Min.
Typ.[2]
Max.
2.4
0.4
2.2
–0.3
VCC +0.3
0.8
–1 +1
–1 +1
12.5 20
2.5
1.5
4 20
Capacitance[3]
Parameter
CIN
COUT
Description
Input Capacitance
Output Capacitance
Test Conditions
TA = 25°C, f = 1 MHz,
VCC = 5.0V
Max.
6
8
Unit
V
V
V
V
µA
µA
mA
mA
mA
µA
Unit
pF
pF
AC Test Loads and Waveforms
R1 1800 Ω
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R1 1800Ω
5V
OUTPUT
OUTPUT
100 pF
INCLUDING
JIG AND
SCOPE
(a)
R2
990 Ω
5 pF
INCLUDING
JIG AND
SCOPE
(b)
Equivalent to: THEVENIN EQUIVALENT
OUTPUT
639 Ω
1.77V
R2
990 Ω
3.0V
GND
≤ 3 ns
Note:
3. Tested initially and after any design or process changes that may affect these parameters.
ALL INPUT PULSES
90%
10%
90%
10%
≤ 3 ns
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Номер в каталоге | Описание | Производители |
WCMA4008C1X | 512K x 8 Static RAM | Weida Semiconductor |
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