Ordering number : E*N7980
LC75857E
LC75857W
Advance Information
CMOS LSI
http://onsemi.com
1/3, 1/4 Duty LCD Driver
with Key Input Function
Overview
The LC75857E and LC75857W are 1/3 duty and 1/4 duty LCD display drivers that can directly drive up to 164
segments and can control up to four general-purpose output ports. These products also incorporate a key scan circuit
that accepts input from up to 30 keys to reduce printed circuit board wiring.
Features
Key input function for up to 30 keys (A key scan is performed only when a key is pressed.)
1/3 duty and 1/4 duty drive schemes can be controlled from serial data.
1/2 bias and 1/3 bias drive schemes can be controlled from serial data.
Capable of driving up to 126 segments using 1/3 duty and up to 164 segments using 1/4 duty.
Sleep mode and all segments off functions that are controlled from serial data.
Switching between key scan output and segment output can be controlled from the serial data.
The key scan operation enabled/disabled state can be controlled from the serial data.
Switching between segment output port and general-purpose output port can be controlled from serial data.
The common and segment output waveform frame frequency can be controlled from the serial data.
Switching between RC oscillator mode and external clock mode can be controlled from the serial data.
Serial data I/O supports CCB format communication with the system controller.
Direct display of display data without the use of a decoder provides high generality.
Independent V
LCD
for the LCD driver block.
(When the logic block supply voltage V
DD
is in the range 3.6 to 6.0 V, V
LCD
can be set to a voltage in the range 0.75
V
DD
to 6.0 V, and when V
DD
is in the range 2.7 to 3.6 V, V
LCD
can be set to a voltage in the range 2.7 to 6.0 V.)
Provision of an on-chip voltage-detection type reset circuit prevents incorrect displays.
CCB is ON Semiconductor® ’s original format. All addresses are managed
by ON Semiconductor® for this format.
CCB is a registered trademark of Semiconductor Components Industries, LLC.
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
Semiconductor Components Industries, LLC, 2013
July, 2013
92504TN (OT) No.7980-1/39
LC75857E, LC75857W
Specifications
Absolute Maximum Ratings
at Ta=25°C, V
SS
=0V
Parameter
Maximum supply voltage
Symbol
V
DD
max
V
LCD
max
V
IN
1
Input voltage
V
IN
2
V
IN
3
V
OUT
1
Output voltage
V
OUT
2
V
OUT
3
I
OUT
1
Output current
I
OUT
2
I
OUT
3
I
OUT
4
Allowable power dissipation
Operating temperature
Storage temperature
Pd max
Topr
Tstg
V
DD
V
LCD
CE, CL, DI
OSC,TEST
V
LCD
1, V
LCD
2, KI1 to KI5
DO
OSC
S1 to S42, COM1 to COM4, KS1 to KS6, P1 to P4
S1 to S42
COM1 to COM4
KS1 to KS6
P1 to P4
Ta = 85°C
Conditions
Ratings
–0.3 to +7.0
–0.3 to +7.0
–0.3 to +7.0
–0.3 to V
DD
+0.3
–0.3 to V
LCD
+0.3
–0.3 to +7.0
–0.3 to V
DD
+0.3
–0.3 to V
LCD
+0.3
300
3
1
5
200
–40 to +85
–55 to +125
mW
°C
°C
mA
µA
V
V
Unit
V
Allowable Operating Ranges
at Ta = –40 to +85°C, V
SS
=0V
Parameter
Symbol
V
DD
Supply voltage
V
LCD
V
LCD
1
V
LCD
2
V
IH
1
Input high level voltage
V
IH
2
V
IH
3
V
IL
1
Input low level voltage
V
IL
2
V
IL
3
Recommended RC oscillator external resistor
Recommended RC oscillator external capacitor
Guaranteed RC oscillator operating range
External clock frequency
External clock duty
Data setup time
Data hold time
CE wait time
CE setup time
CE hold time
High level clock pulse width
Low level clock pulse width
Rise time
Fall time
DO output delay time
DO rise time
R
OSC
C
OSC
f
OSC
f
CK
D
CK
t
ds
t
dh
t
cp
t
cs
t
ch
tø
H
tø
L
t
r
t
f
t
dc
t
dr
V
DD
V
LCD
: V
DD
= 3.6 V to 6.0 V
V
LCD
: V
DD
= 2.7 V to 3.6 V
V
LCD
1
V
LCD
2
CE, CL, DI
KI1 to KI5
OSC: External clock mode
CE, CL, DI
KI1 to KI5
OSC: External clock mode
OSC: RC oscillator mode
OSC: RC oscillator mode
OSC: RC oscillator mode
OSC: External clock mode
OSC: External clock mode
CL, DI
CL, DI
CE, CL
CE, CL
CE, CL
CL
CL
CE, CL, DI
CE, CL, DI
DO R
PU
=4.7 kΩ, C
L
=10pF
*
1
DO R
PU
=4.7 kΩ, C
L
=10pF
*
1
:Figure 4
:Figure 4
:Figures 2,3
:Figures 2,3
:Figures 2,3
:Figures 2,3
:Figures 2,3
:Figures 2,3
:Figures 2,3
:Figures 2,3
:Figures 2,3
:Figures 2,3
:Figures 2,3
19
19
30
160
160
160
160
160
160
160
160
160
1.5
1.5
0.8 V
DD
0.6 V
LCD
0.7 V
DD
0
0
0
39
1000
38
38
50
76
76
70
Conditions
Ratings
min
2.7
0.75 V
DD
2.7
2/3 V
LCD
1/3 V
LCD
typ
max
6.0
6.0
6.0
V
LCD
V
LCD
6.0
V
LCD
V
DD
0.2 V
DD
0.2 V
LCD
0.3 V
DD
kΩ
pF
kHz
kHz
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
V
V
V
V
Unit
Input voltage
Note:
*1.
Since DO is an open-drain output, these values depend on the resistance of the pull-up resistor R
PU
and the load capacitance C
L
.
No. 7980-2/39
LC75857E, 75857W
Electrical Characteristics for the Allowable Operation Ranges
Parameter
Symbol
V
H1
V
H2
V
DET
I
IH
1
I
IH
2
I
IL
1
I
IL
2
V
IF
R
PD
I
OFFH
V
OH
1
Output high level voltage
V
OH
2
V
OH
3
V
OH
4
V
OL
1
Output low level voltage
V
OL
2
V
OL
3
V
OL
4
V
OL
5
V
MID
1
V
MID
2
Output middle level voltage
*
2
V
MID
3
V
MID
4
V
MID
5
Oscillator frequency
fosc
I
DD
1
I
DD
2
I
LCD
1
Current drain
I
LCD
2
I
LCD
3
CE, CL, DI: V
I
= 6.0 V
OSC: V
I
= V
DD
External clock mode
CE, CL, DI: V
I
= 0 V
OSC: V
I
= 0 V External clock mode
KI1 to KI5
KI1 to KI5: V
LCD
= 5.0 V
KI1 to KI5: V
LCD
= 3.0 V
DO: VO = 6.0 V
KS1 to KS6: I
O
= –500 µA V
LCD
= 3.6 to 6.0 V
KS1 to KS6: I
O
= –250 µA V
LCD
= 2.7 to 3.6 V
P1 to P4: I
O
= –1 mA
S1 to S42: I
O
= –20 µA
COM1 to COM4: I
O
= –100 µA
KS1 to KS6: I
O
= 25 µA V
LCD
= 3.6 to 6.0 V
KS1 to KS6: I
O
= 12.5 µA V
LCD
= 2.7 to 3.6 V
P1 to P4: I
O
= 1 mA
S1 to S42: I
O
= 20 µA
COM1 to COM4: I
O
= 100 µA
DO: I
O
= 1 mA
COM1 to COM4: 1/2 bias, I
O
= ±100 µA
S1 to S42: 1/3 bias,I
O
= ±20 µA
S1 to S42: 1/3 bias, I
O
= ±20 µA
COM1 to COM4: 1/3 bias,I
O
= ±100 µA
COM1 to COM4: 1/3 bias,I
O
= ±100 µA
OSC: R
OSC
= 39 k , C
OSC
= 1000 pF
V
DD
:Sleep mode
V
DD
: V
DD
= 6.0 V, output open,fosc = 38 kHz
V
LCD
: Sleep mode
V
LCD
: V
LCD
= 6.0 V, output open, 1/2 bias,
fosc = 38 kHz
V
LCD
: V
LCD
= 6.0 V, output open, 1/3 bias,
fosc = 38 kHz
100
60
300
1/2 V
LCD
– 0.9
2/3 V
LCD
– 0.9
1/3 V
LCD
– 0.9
2/3 V
LCD
– 0.9
1/3 V
LCD
– 0.9
30.4
38
0.1
50
100
100
200
–5.0
–5.0
0.05 V
LCD
250
500
6.0
V
LCD
– 1.0 V
LCD
– 0.5 V
LCD
– 0.2
V
LCD
– 0.8 V
LCD
– 0.4 V
LCD
– 0.1
V
LCD
– 0.9
V
LCD
– 0.9
V
LCD
– 0.9
0.2
0.1
0.5
0.4
1.5
1.2
0.9
0.9
0.9
0.5
1/2 V
LCD
+ 0.9
2/3 V
LCD
+ 0.9
1/3 V
LCD
+ 0.9
2/3 V
LCD
+ 0.9
1/3 V
LCD
+ 0.9
45.6
100
600
5
µA
200
120
kHz
V
V
V
CE, CL, DI
KI1 to KI5
2.0
Conditions
Ratings
min
typ
0.1 V
DD
0.1 V
LCD
2.2
2.4
5.0
5.0
max
Unit
Hysteresis
Power-down detection voltage
Input high level current
V
V
µA
Input low level current
Input floating voltage
Pull-down resistance
Output off leakage current
µA
V
k
µA
Nete:
*2.
Excluding the bias voltage generation divider resistor built into V
LCD
1 and V
LCD
2. (See Figure 1.)
Package Dimensions
unit : mm (typ)
17.2
14.0
48
49
33
32
[ LC75857E ]
0.8
[ LC75857W ]
12.0
48
49
33
32
0.5
10.0
14.0
17.2
64
1
0.8
(1.0)
(2.7)
17
16
0.35
0.15
64
1
0.5
(1.25)
(1.5)
17
16
0.18
0.15
3.0max
1.7max
0.1
0.1
SQFP64(10X10)
QIP64E(14X14)
10.0
12.0
No.7980-3/39
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