Connection Diagrams

Dual-In-Line Package

TLF6137 – 2

Top View

FIGURE 2a

Plastic Chip Carrier

TLF6137 – 11

Top View

Dual-In-Line Package

TLF6137 – 3

Top View

FIGURE 2b

Plastic Chip Carrier

TLF6137 – 12

Top View

Order Number MM5452N MM5453N

MM5452V or MM5453V

See NS Package Number N40A or V44A

Functional Description

The MM5452 is specifically designed to operate 4

-digit 7-

segment displays with minimal interface with the display and

the data source Serial data transfer from the data source to

the display driver is accomplished with 2 signals serial data

and clock Since the MM5452 does not contain a character

generator the formatting of the segment information must

be done prior to inputting the data to the MM5452 Using a

format of a leading ‘‘1’’ followed by the 32 data bits allows

data transfer without an additional load signal The 32 data

bits are latched after the 36th clock is complete thus pro-

viding non-multiplexed direct drive to the display Outputs

change only if the serial data bits differ from the previous

time

A block diagram is shown in

Figure 1 For the MM5452 a

DATA ENABLE is used instead of the 33rd output If the

DATA ENABLE signal is not required the 33rd output can

be brought out This is the MM5453 device

3