Datenblatt-pdf.com


WCMA1008U1X Schematic ( PDF Datasheet ) - Weida Semiconductor

Teilenummer WCMA1008U1X
Beschreibung 128K x 8 Static RAM
Hersteller Weida Semiconductor
Logo Weida Semiconductor Logo 




Gesamt 12 Seiten
WCMA1008U1X Datasheet, Funktion
A1008U1X
WCMA1008U1X
Features
• High Speed
— 55ns and 70ns availability
• Voltage range
— 2.7V–3.6V
• Ultra low active power
— Typical active current: 20 mA @ f = fmax (70ns speed)
• Low standby power
• Easy memory expansion with CE and OE features
• Automatic power-down when deselected
• CMOS for optimum speed/power
Functional Description
The WCMA1008U1X is a high-performance CMOS static
RAM organized as 128K words by 8 bits. Easy memory expan-
sion is provided by an active LOW Chip Enable (CE1), an ac-
tive HIGH Chip Enable (CE2), an active LOW Output Enable
(OE) and three-state drivers. These devices have an automat-
Logic Block Diagram
128K x 8 Static RAM
ic power-down feature, reducing the power consumption by
over 99% when deselected.
Writing to the device is accomplished by taking Chip Enable
one (CE1) and Write Enable (WE) inputs LOW and the Chip
Enable two (CE2) input HIGH. Data on the eight I/O pins (I/O0
through I/O7) is then written into the location specified on the
address pins (A0 through A16).
Reading from the device is accomplished by taking Chip En-
able one (CE1) and Output Enable (OE) LOW while forcing
Write Enable (WE) and Chip Enable two (CE2) HIGH. Under
these conditions, the contents of the memory location speci-
fied 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 (CE1
HIGH or CE2 LOW), the outputs are disabled (OE HIGH), or
during a write operation (CE1 LOW, CE2 HIGH, and WE LOW).
The WCMA1008U1X is available in a 32 Lead TSOP and
STSOP packages.
Pin Configurations
www.DataSheet4U.com
A0
A1
A2
AA34
A5
A6
AA78
CE1
CE2
WE
OE
INPUT BUFFER
512x 256x 8
ARRAY
COLUMN
DECODER
POWER
DOWN
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
A11 25
A9 26
A8 2267
A13 28
WE 29
CE2 30
A15 31
VCC 32
NC 1
A16 2
A14 3
A12 4
A7 5
A6 6
A5 7
A4 8
A11 1
A9 2
A8 3
A13 4
WE 5
CE2 6
A15 7
VCC 8
NC 9
A16 10
A14 11
A12 12
A7 13
A6 14
A5 15
A4 16
STSOP
Top View
(not to scale)
TSOP I
Top View
(not to scale)
24 OE
23 A10
22 CE1
21 I/O7
20 I/O6
19 I/O5
18 I/O4
17 I/O3
16 GND
15 I/O2
14 I/O1
13 I/O0
12 A0
11 A1
10 A2
9 A3
32 OE
31 A10
30 CE1
29 I/O7
28 I/O6
27 I/O5
26 I/O4
25 I/O3
24 GND
23 I/O2
22 I/O1
21 I/O0
20 A0
19 A1
18 A2
17 A3






WCMA1008U1X Datasheet, Funktion
Switching Waveforms
Read Cycle No. 1 (Address Transition Controlled) [9, 10]
ADDRESS
DATA OUT
tOHA
PREVIOUS DATA VALID
tAA
tRC
WCMA1008U1X
DATA VALID
Read Cycle No. 2 (OE Controlled)[10, 11]
ADDRESS
CE1
tRC
CE2
OE
DATA OUT
VCC
SUPPLY
CURRENT
tACE
tDOE
tLZOE
HIGH IMPEDANCE
tLZCE
tPU
50%
DATA VALID
Notes:
9. Device is continuously selected. OE, CE1 = VIL, CE2 = VIH.
10. WE is HIGH for read cycle.
11. Address valid
www.DataSheet4U.com
prior
to
or
coincident
with
CE1
transition
LOW
and
CE2
transition
HIGH.
tHZOE
tHZCE
HIGH
IMPEDANCE
tPD
50%
ICC
ISB
6

6 Page









WCMA1008U1X pdf, datenblatt
Document Title: WCMA1008U1X, 128K x 8 Static RAM
REV.
Spec #
ECN #
Issue Date
** 38-14023
115246
4/24/2002
WCMA1008U1X
Orig. of Change Description of Change
MGN
New Data Sheet
www.DataSheet4U.com
12

12 Page





SeitenGesamt 12 Seiten
PDF Download[ WCMA1008U1X Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
WCMA1008U1X128K x 8 Static RAMWeida Semiconductor
Weida Semiconductor

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche