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Silan Semiconductors
1/3 DUTY GENERAL-PURPOSE LCD DRIVER
DESCRIPTION
The SC75823 is a general-purpose LCD driver that can be used for frequency display in microprocessor-controlled radio receives and in other display applications. In addition to being able to directly drive up to 156 LCD segments.
SC75823
QFP-64-14x14-0.8
FEATURES
* Supports both 1/3 duty 1/2 bias and 1/3 duty 1/3 bias LCD drive of up to 156 segments under serial data control. * Serial data input supports CCB format communication with the system controller. * Serial data control of the power-saving mode based backup function and all the segments forced off function. * High generality since display data is displayed directly without decoder intervention. * The INH pin can force the display to the off state. * The LCD drive bias voltage can be provided internally or externally. * Power supply voltage: 4.5 to 6.0V
LQFP-64-10 x 10-0.5
ORDERING INFORMATION
Device
SC75823A SC75823B
Package
LQFP-64-10 X 10-0.5 QFP-64-14 X 14-0.8
BLOCK DIAGRAM
COM1 COM2 COM3 S52 S51 S1
VDD1 Common Driver VDD2
Latch & Driver
INH Shift Register
OSC
Clock Generator Address Detector
DI
CL
CE
VDD
VSS
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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PIN CONFIGURATION
S48 S47 S46 S45 S44 S43 S42 S41 S40 S39 S38 S37 S36 S35 S34 34
SC75823
S33 33 32 S32 31 S31 30 S30 29 S29 28 S28 27 S27 26 S26 25 S25 24 S24 23 S23 22 S22 21 S21 20 S20 19 S19 18 S18 17 S17 16 S16
48 S49 49 S50 50 S51 51 S52 52 COM1 53 COM2 54 COM3 55 VDD 56 INH 57 VDD1 58 VDD2 59 VSS 60 OSC 61 CE 62 CL 63 DI 64 1 S1
47
46
45
44
43
42
41
40
39
38
37
36
35
SC75823
2 S2
3 S3
4 S4
5 S5
6 S6
7 S7
8 S8
9 S9
10 S10
11 S11
12 S12
13 S13
14 S14
15 S15
ABSOLUTE MAXIMUM RATINGS (Tamb=25C, VSS=0 V)
Characteristics
Maximum Supply Voltage Input Voltage Output Voltage Output Current Allowable Power Dissipation Operating Temperature Storage Temperature
Symbol
VDDmax VIN1 VIN2 VOUT IOUT1 IOUT2 PDmax Topr Tstg
Value
-0.3 to +6.5 -0.3 to +6.5 -0.3 to VDD+0.3 -0.3 to VDD+0.3 300 3 200 -40 to +85 -55 to 125
Unit
V V V V A mA mW C C
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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ALLOWABLE OPERATING RANGE (Tamb=-40 to +85C, VSS=0V)
Characteristics
Supply Voltage Input Voltage Input High level Voltage Input Low Level Voltage Recommended External Resistance Recommended External Capacitance Guaranteed Oscillator Range 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
INH Switching Time
SC75823
Symbol
VDD VDD1 VDD2 VIH VIL ROSC COSC fOSC tds tdh tcp tcs tch tH tL tr tf t2
Test Condition
VDD VDD1 VDD2 CE, CL, DI, INH CE, CL, DI, INH OSC OSC OSC CL, DI: figure 2 CL, DI: figure 2 CE, CL: figure 2 CE, CL: figure 2 CE, CL: figure 2 CL: figure 2 CL: figure 2 CE, CL, DI: figure 2 CE, CL, DI: figure 2
INH , CE: figure 3
Min.
4.5
Typ.
2/3VDD 1/3VDD
Max.
6.0 6.0 6.0 6.0 0.7
Unit
V V V V V k pF
4.0 0 47 1000 19 100 100 100 100 100 100 100 100 100 10 38
76
kHz ns ns ns ns ns ns ns ns ns s
ELECTRICAL CHARACTERISTICS
Characteristics
Input High Level Current Input Low Level Current Oscillator Frequency Hysteresis Width Output High Level Voltage Output Low Level Voltage Output High Level Voltage Output Low Level Voltage
Symbol
IIH IIL fOSC VH VOH1 VOL1 VOH2 VOL2 VMID1
Test Condition
CE, CL, DI, INH ; VI=6V CE, CL, DI, INH ; VI=0V OSC;ROSC=47k, COSC=1000pF CE, CL, DI, INH ; VDD=5V S1 to S52; IO=-20A S1 to S52; IO=20A COM1 to COM3; IO=-100A COM1 to COM3; IO=100A 1/2 bias, COM1 to COM3; IO=100A 1/3 bias, COM1 to COM3; IO=100A
Min.
Typ.
Max.
5
Unit
A A
-5 38 0.3 VDD-1.0 1.0 VDD-1.0 1.0 1/2VDD1.0 2/3VDD1.0
kHz V V V V V V V (To be continued)
Intermediate Level Voltage VMID2
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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(Continued)
SC75823
Test Condition
1/3 bias, COM1 to COM3; IO=100A 1/3 1/3 bias, bias, S1 S1 to to S52; S52; IO=20A IO=20A Power saving mode f=38kHz, 1/2 bias, VDD=5V f=38kHz, 1/3 bias, VDD=5V f=38kHz, 1/2 bias, VDD=6V f=38kHz, 1/3 bias, VDD=8V 400 300 650 580
Characteristics
Symbol
VMID3
Min.
1/3VDD1.0 2/3VDD1.0 1/3VDD1.0
Typ.
Max.
Unit
V V V
Intermediate Level Voltage*
VMID4 VMID5 IDD1 IDD2
5 800 600 1300 1200
A A A A A
Supply Current
IDD3 IDD2 IDD3
Note: * Except the bias voltage generation divider resistors that are built into VDD1 and VDD2.(see figure 1)
Figure 1
VDD
VDD1 To the common segment driver
VDD2 Except these resistors
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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Fig 2 1.When CL is stopped at the low level
SC75823
CE
VIH VIL tH tL VIH VIL tr tf tcp tcs tch VIH
CL
VIH 50% VIL
DI
VIH VIL tds
VIH VIL tdh
2.When CL is stopped at the high level
CE
VIH VIL tL tH VIH VIL tr tf tcp tcs tch VIH
CL
VIH 50% VIL
VIH DI VIL tds
VIH VIL tdh
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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Silan Semiconductors
PIN DESCRIPTION
Pin No
1-52 53 54 55 61 62 63 64
SC75823
Description
Symbol
S1 to S52 COM1 COM2 COM3 OSC CE CL DI
I/O
O
Segment outputs for displaying the display data transferred by serial data input. Common driver outputs. The frame frequency fO is given by: fO=(fOSC/384)Hz Oscillator connection
O
I/O
An oscillator circuit is formed by connecting an external resistor and capacitor to this pin. CE: chip enable CL: synchronization clock DI: transfer data
I
Serial data transfer inputs. These pins are connected to the control microprocessor. Display off control input
INH =low (VSS)......Display forced off (S1 to S52, COM1 to COM3=low)
57
INH
I
INH =high (VDD)......Display on
note that serial data transfers can be performed when the display is forced off. 58 59 56 60 VDD1 VDD2 VDD VSS I I --Used for the 2/3 bias voltage when bias voltage are provided externally. Connect to VDD2 when 1/2 bias is used. Used for the 1/3 bias voltage when bias voltage are provided externally. Connect to VDD1 when 1/2 bias is used. Power supply. Provide a voltage of between 4.5 and 6.0V Ground. Connect this pin to the system ground.
FUNCTION DESCRIPTION
Serial data transfer format 1.
CE CL
When CL is stopped at the low level
DI
1 B0
0 B1
0 B2
0 B3
0 A0
0 A1
1 A2
0 A3
D1
D2
D3 Display data 156 bits
D154 D155 D156
DR
SC
BU
*
CCB address 8 bits
Control data 4 bits *: don't care
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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2.
CE CL
SC75823
When CL is stopped at high level
DI
1 B0
0 B1
0 B2
0 B3
0 A0
0 A1
1 A2
0 A3
D1
D2
D3 Display data 156 bits
D154 D155 D156
DR
SC
BU
*
CCB address 8 bits
Control data 4 bits *: don't care
* CCB address.......41H * D1 to D156..........Display data Dn (n=1 to 156)=1........Display on Dn (n=1 to 156)=0........Display off * DR.....................1/2-bias drive or 1/3-bias drive switching control data * SC.....................Segments on/off control data * BU.....................Normal mode/power-saving mode control data
Serial data transfer examples * When 63 segments are used 63 bits is display data (D94 to D156) must be sent.
8 bits 67 bits D154 D155 D156 DR SC SU
1 B0
0 B1
0 B2
0 B3
0 A0
0 A1
1 A2
0 A3
D94 D95 D96
*
*: don't care
Control data function 1. DR: 1/2-bias drive or 1/3-bias drive switching control data
This control data selects either 1/2-bias drive or 1/3-bias drive. DR 0 1 Drive type 1/2-bias drive 1/3-bias drive
2. SC: segments on/off control data This control data bit controls the on/off state of the segments. SC 0 1 Display state On Off
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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Silan Semiconductors
SC75823
However, note that when the segments are turned off by setting SC to 1, the segments are turned off by outputting segment off waveforms from the segment output pins.
3. BU: Normal mode/power-saving mode control data BU 0 1 Mode Normal mode Power-saving mode. In this mode the OSC pin oscillator is stopped and the common and segment pins output VSS levels.
Display data to segment output pin correspondence Segment output pin S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 Segment output pin S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38 S39 S40 S41 S42 S43 S44 S45
COM3 D1 D4 D7 D10 D13 D16 D19 D22 D25 D28 D31 D34 D37 D40 D43 D46 D49 D52 D55
COM2 D2 D5 D8 D11 D14 D17 D20 D23 D26 D29 D32 D35 D38 D41 D44 D47 D50 D53 D56
COM1 D3 D6 D9 D12 D15 D18 D21 D24 D27 D30 D33 D36 D39 D42 D45 D48 D51 D54 D57
COM3 D79 D82 D85 D88 D91 D94 D97 D100 D103 D106 D109 D112 D115 D118 D121 D124 D127 D130 D133
COM2 D80 D83 D86 D89 D92 D95 D98 D101 D104 D107 D110 D113 D116 D119 D122 D125 D128 D131 D134
COM1 D81 D84 D87 D90 D93 D96 D99 D102 D105 D108 D111 D114 D117 D120 D123 D126 D129 D132 D135
To be continued
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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(Continued) Segment output pin S20 S21 S22 S23 S24 S25 S26 COM3 D58 D61 D64 D67 D70 D73 D76 COM2 D59 D62 D65 D68 D71 D74 D77 COM1 D60 D63 D66 D69 D72 D75 D78 Segment output pin S46 S47 S48 S49 S50 S51 S52 COM3 D136 D139 D142 D145 D148 D151 D154
SC75823
COM2 D137 D140 D143 D146 D149 D152 D155 COM1 D138 D141 D144 D147 D150 D153 D156
For example, the table below lists the segment output states for the S11 output pin.
Display data D31
0 0 0 0 1 1 1 1
D32
0 0 1 1 0 0 1 1
D33
0 1 0 1 0 1 0 1
Segment output pin (S11) state
The LCD segments corresponding to COM1 to COM3 are off. The LCD segments corresponding to COM1 is on. The LCD segments corresponding to COM2 is on. The LCD segments corresponding toCOM1 and COM2 are on. The LCD segments corresponding to COM3 is on. The LCD segments corresponding to COM1 and COM3 are on. The LCD segments corresponding to COM2 and COM3 are on. The LCD segments corresponding to COM1 to COM3 are on
INH and display control
Since the LSI internal data (D1 to D156, DR, SC and BU) is undefined when power is first applied, the display is off (S1 to S52, COM1 to COM3= low) by setting the INH pin low at the same as power is applied. Then, meaningless display at the power-on can be prevented by transferring serial data from the controller while the display is off and setting INH pin high after the transfer completes.(see figure3).
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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Figure 3
SC75823
VDD R INH C
VDD
INH t1 CE Transfer of display and control data Undefined t2
VIL
VIL
Internal data
Delined
t1.......Determined by the value of C and R t2......10s(minimum)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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TIMING DIAGRAM
1/2 Bias , 1/3 Duty Drive Technique
SC75823
VDD COM1 VDD1, VDD2, (1/2 VDD) VSS VDD COM2 VDD1, VDD2 VSS VDD COM3 VDD1, VDD2 VSS VDD LCD driver output when all LCD segments corresponding to COM1, COM2, and COM3 are turnned off. LCD driver output when only LCD segments corresponding to COM1, are on. VDD1, VDD2 VSS VDD VDD1, VDD2 VSS VDD LCD driver output when only LCD segments corresponding to COM2, are on. LCD driver output when only LCD segments corresponding to COM1and COM2 are on. LCD driver output when only LCD segments corresponding to COM3 are on. LCD driver output when LCD segments corresponding to COM1 and COM3 are on. VDD1, VDD2 VSS VDD VDD1, VDD2 VSS VDD VDD1, VDD2 VSS VDD VDD1, VDD2 VSS LCD driver output when LCD segments corresponding to COM2 and COM3 are on. LCD driver output when all LCD segments corresponding to COM1,COM2, and COM3 are on. VDD VDD1, VDD2 VSS VDD VDD1, VDD2 VSS
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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1/3 Bias, 1/3 Duty Drive Technique
SC75823
VDD VDD1 (2/3 VDD)
COM1
VDD2 (1/3 VDD) VSS VDD
COM2
VDD1 VDD2 VSS VDD VDD1
COM3
VDD2 VSS VDD
LCD driver output when all LCD segments corresponding to COM1, COM2, and COM3 are turnned off.
VDD1 VDD2 VSS VDD
LCD driver output when only LCD segments corresponding to COM1, are on.
VDD1 VDD2 VSS VDD
LCD driver output when only LCD segments corresponding to COM2, are on.
VDD1 VDD2 VSS VDD
LCD driver output when LCD segments corresponding to COM1and COM2 are on.
VDD1 VDD2 VSS VDD
LCD driver output when only LCD segments corresponding to COM3 are on.
VDD1 VDD2 VSS VDD
LCD driver output when LCD segments corresponding to COM1 and COM3 are on.
VDD1 VDD2 VSS VDD
LCD driver output when LCD segments corresponding to COM2 and COM3 are on.
VDD1 VDD2 VSS VDD
LCD driver output when all LCD segments corresponding to COM1,COM2, and COM2 are on.
VDD1 VDD2 VSS
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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TEST CIRCUIT1
1/3 Bias (for use with small panels)
SC75823
61 VDD OSC 56 VDD COM1 53 LCD panel (up to 156 segments)
LCD panel (up to 156 segments)
57 INH 60 VSS OPEN 58 VDD1 59 VDD2
COM2 54 COM3 55
S1
1
62 CE From the microcontroller 63 CL 64 DI S52 52
TEST CIRCUIT2
1/3 Bias (for use with normal size panels)
VDD
61 OSC 56 VDD COM1 53 57 INH 60 VSS 58 VDD1 59 VDD2 S1 1 COM2 54 COM3 55
C0.047F
C
C
62 CE From the microcontroller 63 CL 64 DI S52 52
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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TEST CIRCUIT3
1/3 Bias (for use with large panels)
SC75823
VDD
61 OSC 56 VDD COM1 53 LCD panel (up to 156 segments)
Rev: 1.1 2002.03.04
57 INH R 60 VSS 58 VDD1 R C C R 59 VDD2
COM2 54 COM3 55
10KR1K C0.047F
S1
1
62 CE From the microcontroller 63 CL 64 DI S52 52
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
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PACKAGE OUTLINE
SC75823
UNIT: mm
QFP-64-14 x 14-0.8
16.00B0.20 14.00B0.10 1.50B0.10
48 49
33 32
14.00B0.10
16.00B0.20
15.00
1.0
64
1
17 16
0.35B0.1
12.00 0.127B0.05
0.8
LQFP-64-10x10-0.5
12.00B0.20 10.00B0.10 1.50B0.10
UNIT: mm
48 49
33 32
1.0
64
1
17 16
10.0B0.2
13.6B0.4
11.00
7.50 0.127B0.05
0.20B0.05
0.5
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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Attach Revision History
Data
2001.12.30 2002.03.04
SC75823
REV
1.0 1.1 Original
Description
Modify the "SC7523" to "SC75823"
Page
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2002.03.04
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