APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE1of10
FEATURES
32768x8 bit static CMOS RAM
Access times 70 ns
Common data inputs and data
outputs
Three-state outputs
Typ. operating supply current
o 70 ns: 50 mA
TTL/CMOS-compatible
Automatical reduction of power
dissipation in long Read Cycles
Power supply voltage 5V + 10%
Operating temperature ranges
o 0 to 70 °C
o -40 to 85 °C
QS 9000 Quality Standard
ESD protection > 2000 V
(MIL STD 883C M3015.7)
Latch-up immunity >100 mA
Packages: PDIP28 (600 mil)
SOP28 (330 mil)
DESCRIPTION
The AS6C62256A is a static RAM
manufactured using a CMOS
process technology with th e
following operating modes:
- Read - Standby
- Write - Data Retention
The memory array is based on a 6-
transistor cell.
The circuit is activated by the falling
edge of E. The address and control
inputs open simultaneously .
According to the informatio n of W
and G, the data inputs, or outputs,
are active. In a Read cycle, the data
outputs are activated by the falling
edge of G, afterwards the data word
read will be available at the outputs
DQ0-DQ7. After the address
change, the data outputs go High-Z
until the new information read is
available. The data outputs have not
preferred state.
The Read cycle is finished by the
falling edge of W, or by the rising
edge of E, respectively.
Data retention is guaranteed down
to 2 V. With the exception of E, all
inputs consist of NOR gates, so that
no pull-up/pull-down resistors are
required.
PINCONFIGURATION
PINDESCRIPTION
APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE2of10
APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE3of10
APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE4of10
APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE5of10
APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE6of10
APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE8of10
APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE9of10
APRIL2009AS6C62256A
3
2KX
8
BITL
O
WP
O
WER
C
M
OS
S
RAM
APRIL
/
2009ALLIANCEMEMORY PAGE10 of10
AllianceMemory,Inc
511TaylorWay,
SanCarlos,CA94070,USA
Phone:650‐610‐6800
Fax:650‐620‐9211
www.alliancememory.com
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makechangestothisdocumentanditsproductsatanytimewithoutnotice.Allianceassumesnoresponsibilityforanyerrorsthatmayappearin
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