SM55161A Austin Semiconductor, SM55161A Datasheet - Page 24

• Manufacturer Part Number: SM55161A
• Description: 262144 x 16 BIT VRAM MULTIPORT VIDEO RAM
• Manufacturer: Austin Semiconductor

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power up
To achieve proper device operation, an initial pause of 200 ms is
required after power up followed by a minimum of eight RAS\
cycles or eight CBR cycles to initialize the DRAM port. A full-
TABLE 6: Internal State of SMJ55161A
ABSOLUTE MAXIMUM RATINGS*
Supply voltage range, V
Voltage range on any pin................................................-1V to +7 V
Short-circuit output current.......................................................50mA
Power dissipation.........................................................................1.1W
Operating free-air temperature range, T
Storage temperature range, T
RECOMMENDED OPERATING CONDITIONS
NOTES:
1. The algebraic convention, where the more negative (less positive) limit is designated as minimum, is used for logic-voltage levels only.
SMJ55161A
Rev. 1.6 03/05
QSF
Write Mode
Write-mask Register
Color Register
Serial-Register Tap Point
SAM Port
Supply Voltage
Supply Voltage
High-level input voltage
Low-level input voltage
Operating free-air temperature
CONDITION
STATE
Austin Semiconductor, Inc.
CC
**........................................-1V to +7 V
1
stg
..................................-65°C to 150°C
Nonpersistent Mode
Undefined
Defined by the transfer cycle during initialization
Defined by the transfer cycle during initialization
Undefined
Output Mode
A
SYMBOL
...................-55°C to 125°C
V
V
V
V
T
CC
SS
IH
IL
A
STATE AFTER INITIALIZATION
MIN
-0.5
-55
4.5
2.4
24
NOM
register-transfer-read cycle and two SC cycles are required to
initialize the SAM port.
as shown in Table 6.
*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 at
these or any other conditions above those indicated in the
operation section of this specification is not implied. Exposure
to absolute maximum rating conditions for extended periods
may affect reliability.
**All voltage values are with respect to V
5
0
After initialization, the internal state of the SMJ55161A is
V
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
CC
MAX
125
5.5
0.8
+0.5
UNIT
°C
V
V
V
V
Production
SM55161A
SS
.
VRAM