NT7705

160 Output LCD Segment/Common Driver

1/33

Ver1.0

Features

(Segment mode)

Shift Clock frequency :
14 MHz (Max.) (V

= 5V

�

10%)

8 MHz (Max.) (V

= 2.5V - 4.5V)

Adopts a data bus system

4-bit/8-bit parallel input modes are selectable with a
mode (MD) pin

Automatic transfer function with an enable signal

Automatic counting function when in the chip select
mode, causes the internal clock to be stopped by
automatically counting 160 bits of input data

(Common mode)

Shift clock frequency:
4.0MHz (Max.)

Built-in 160-bits bidirectional shift register (divisible into
80-bits x 2)

Available in a single mode (160-bits shift register) or in a
dual mode (80-bits shift register x 2)
1. Y1

Y160

Single mode

2. Y160

Y1 Single

mode

3. Y1

Y80, Y81

Y160

Dual mode

4. Y160

Y81, Y80

Dual mode

The above 4 shift directions are pin-selectable

Available in a 160 outputs mode or in a 120 outputs mode
by pin option for easier the ITO layout

(Both segment mode and common mode)

Supply voltage for LCD drive: 15.0 to 40.0V

Number of LCD driver outputs: 160

Low output impedance

Low power consumption

Supply voltage for the logic system: +2.5 to +5.5V

CMOS process

Package : Gold bump die

Not designed or rated as radiation hardened

General Description

The NT7705 is a 160-bit output segment/common driver LSI
suitable for driving the large-scale dot matrix LCD panels
used by PDA's, personal computers and workstations for
example. Through the use of COG technology, it is ideal for
substantially decreasing the size of the frame section of the
LCD module. The NT7705 is good as both a segment driver
and a common driver, and a low power consuming,

high-precision LCD panel display can be assembled using
the NT7705. In the segment mode, the data input is selected
4bit parallel input mode or as 8bit parallel input mode by a
mode (MD) pin. In common mode, the data input/output pins
are bi-directional and the four data shift directions are
pin-selectable.

NT7705

2/33 Ver1.0

Pad Configuration

NT7705

ALK_L

ALK_R

217

232

218

Dummy Pad

Block Diagram

160 Bits 4 Level Driver

160 Bits Level Shifter

160 Bits Line Latch/Shift Register

Y159 Y160

Level

Shifter

DISPOFF

Active

Control

EIO

Control

Logic

SP Conversion & Data Control

(4 to 8 or 8 to 8)

L/R

S/C

8Bits x 2

Data Latch

Data Latch Control

/160

/16

XCK

12L

43L

43R

12R

CMD

NT7705

3/33 Ver1.0

Pad Description

Pad No.

Designation

I/O

Description

224-226 V

Power supply for LCD driver

227-229 V

12L

Power supply for LCD driver

230-232 V

43L

Power supply for LCD driver

1-2 V

Power supply for LCD driver

3-6, 49-52

Ground (0V), these pads must be connected to each other

7-8

CMD

Common mode output selection pin

9-10

L/R

Display data shift direction selection

11-16 V

Power supply for the logic system (+2.5 to + 5.5V)

17-18

S/C

Segment mode/common mode selection

19-20 EIO

I/O

Input/output for chip select or data of shift register

21-34

D0 - D6

Display data input for segment mode

35-36

Display data input for Segment mode / Dual mode data input

37-38 XCK

Display

data

shift

clock input for segment mode

39-40

DISPOFF

Control input for deselect output level

41-42

Latch pulse input / shift clock input for the shift register

43-44 EIO

I/O

Input/output for chip select or data of the shift register

45-46

AC-converting signal input for LCD driver waveform

47-48 MD

Mode

selection

input

53-54 V

Power supply for LCD driver

55-57 V

43R

Power supply for LCD driver

58-60 V

12R

Power supply for LCD driver

61-63 V

Power supply for LCD driver

64-223

Y1 - Y160

LCD driver output

Электронный компонент: NT7705