¡ Semiconductor

MSM548331

1/23

¡ Semiconductor

MSM548331

222,720-Word

¥ 12-Bit Field Memory

DESCRIPTION

The MSM548331 is a 2.7-Mbit, 768 bits ¥ 290 lines, Field Memory. Access is done line by line. The line

address must be set each time a line is changed.

More than two MSM548331s can be cascaded directly without any delay devices between them.

Cascading MSM548331s provides larger capacity and longer delay.

X serial address input enables random initial address setting of serial access in a page. Other than the

random address setting, MSM548331 has several types of address set modes such as line hold,

address jump to initial address and line increment.

SelfrefreshfunctionreleasestheMSM548331frombeingappliedexternalrefreshcontrolclocks even

though it contains dynamic type memory cells. MSM548331 has write mask function or input enable

function (IE), and read-data skipping function or output enable function (OE).

The MSM548331 is especially designed for digital TVs and VTRs for consumer use and video

cameras.

The MSM548331 is not designed for high end use in such applications as medical systems,

professional graphics systems which require long term picture storage, data storage systems and

others.

FEATURES

• 768 ¥ 290 ¥ 12-bit configuration

• Line by line access

• X serial address inputs for random serial initial bit address

• Asynchronous operation

• Serial read and write cycle times

Read cycle: 30 ns

Write cycle: 30 ns

• Low operating supply voltage: 3.3 V

±0.3 V

• Self-refresh

• Various address reset mode for picture processing

• Write mask function (Input enable control)

• Data skipping function (Output enable control)

• Package:

44-pin 400 mil plastic TSOP (Type II) (TSOPII44-P-400-0.80-K) (Product : MSM548331TS-K)

This version: Jan. 1998

Previous version: Dec. 1996

E2L0037-17-Y1