Document Outline
- Main Menu
- S-4670A
- COVER
- FEATURES
- BLOCK DIAGRAM
- OPERATION
- DESCRIPTION OF PINS
- ABSOLUTE MAXIMUM RATINGS
- DC ELECTRICAL CHARACTERISTICS
- AC ELECTRICAL CHARACTERISTICS
- TIMING CHART
- QUALITY STANDARD
- COORDINATES AND DIMENSIONS
Rev. 1.1
Seiko Instruments Inc.
1
The S-4670A is a CMOS thermal head driver containing 128-bit (64 x 2)
shift registers and latches. High speed operation at 16 MHz clock
frequency together with 2-divisible shift registers driven in each 64 bits
makes the S-4670A best for applications such as video printers and
graphic thermal print heads
FEATURES
Low current consumption: 0.6 mA typ.
Driver output withstand voltage: 36 V max.
(fclk = 4 MHz; the SI pin is fixed)
Driver output current: 15 mA typ.
High speed operation:
128-bit shift registers and latches are built in.
16 MHz max. (a single die)
1-division driver enable function at 128 bits
16 MHz max. (cascade connection)
2-division driver enable function at every 64 bits
DriverOFF function when supply voltage drops.
[64 bits x 2/128 bits x 1] shift register switching function
BLOCK DIAGRAM
D-FF
LA
D-FF
LA
D-FF
LA
D-FF
LA
D-FF
LA
D-FF
LA
LA
SW
D-FF
AEN1
SO2
SI1
SI2
SW
SO1
DO
128
DO
65
DO
64
DO
1
GND
V
DD
BEN
GND
CLK
LCHX
AEN2
Figure 1 Block Diagram
128-bit THERMAL HEAD DRIVER
S-4670A
128-bit THERMAL HEAD DRIVER
S-4670A Rev. 1.1
2
Seiko Instruments Inc.
OPERATION
When the SW pin is at "L" level, the shift register reads data, which is input in the SI1 pin at the rising
edge of the clock input, in bits 1 through 128 of the shift register. Fix the SI2 pin when not in use to GND
or VDD.
When the SW pin is at "H" level or open, the shift register reads data which is input in the SI1 or SI2 pin
at the rising edge of the clock input. Data at the SI1 pin is read in bits 1 through 64 of the shift register;
data at the SI2 pin is read in bits 65 through 128 of the shift register.
The latch circuit reads data of the shift register when the LCHX pin is at "L" level, and retains the
preceding data of the shift register when the LCHX pin is at "H" level.
The latch data is output to the driver when pins AEN1 and AEN2 are at "L" level and the BEN pin is at
"H" level. The driver output transistor is turned ON and OFF when the latch data is at "H" level and at
"L" level, respectively. All driver output transistors to be controlled are turned OFF by setting pins AEN1
and AEN2 to "H" level or the BEN pin to "L" level.
The AEN1 pin, AEN2 pin and BEN pin control the driver output bits 1 through 64, 65 through 128 and 1
through 128, respectively.
While the power voltage is transiting from 0 to 5 V and vice versa, the driver output transistors are
forcibly turned OFF.
128-bit THERMAL HEAD DRIVER
Rev. 1.1 S-4670A
Seiko Instruments Inc.
3
DESCRIPTION OF PINS
Note:
For pin assignment, refer to Figure 3, "Outline and Dimensions."
Table 1 Description of Pins
No.
Name
Description
1 to 128
DO1 to DO128
Driver output pins (Nch open-drain output)
142, 148
SO1, SO2
Serial data output pin for 64 bits
2 shift registers
141
BEN
Driver enable input pin; Outputs the latch data (DO1
through DO128) to the driver when the BEN is at "H"
level (a pull-down resistor with Rp =300 k
typ. is built
in).
129 to 136
GND
GND pin (0 V)
139, 147
VDD
Positive power supply pin (+5 V)
140
146
AEN1
AEN2
Driver enable input pins:
The AEN1 and AEN2 output the latch data (DO1
through DO64 and DO65 through DO128, respectively)
to the driver when AEN1 or AEN2 is at "L" level (a pull-
up resistor with Rp =300 k
typ. is built in).
145
LCHX
Data latch signal input pin:
LCHX = "L": Reads data of the shift register.
LCHX = "H": Retains the preceding data.
138
CLK
Clock input pin of the 64 bits x 2 shift register
143
SW
64 bits x 2/128 bits x 1 shift register switching input pin
(a pull-up resistor with Rp =300 k
typ. is built in).
SW = "H" or open: 64 bits x 2 shift register
SW = "L": 128 bits x 1 shift register
Input from the SI2 is not available.
137
144
SI1
SI2
Serial data input pin of the 64 bits x 2 shift register.
Input conditions can be selected by the SW pin:
SW = "H" or open:
SI1 = Serial data input pin for DO1 through DO64
SI2 = Serial data input pin for DO65 through DO128
SW = "L":
SI1 = Serial data input pin for DO1 through DO128.
Fix the SI2 pin to GND or VDD.
ABSOLUTE MAXIMUM RATINGS
Table 2 Absolute Maximum Ratings
Name
Symbol
Standard
Unit
Power Supply Voltage
GND to V
DD
-0.4 to 7.0
V
Driver Output Withstand Voltage
V
DOH
36
V
Driver Output Current
I
DOL
24
mA
Input Voltage
VIN
GND
-0.5 to V
DD
+0.5
V
Output Voltage
VOUT
GND -0.5 to V
DD
+0.5
V
Maximum Junction Temperature
Tjmax
125
C
Operating Temperature Range
Topr
-10 to +80
C
Storage Temperature Range
Tstg
-40 to +125
C
128-bit THERMAL HEAD DRIVER
S-4670A Rev. 1.1
4
Seiko Instruments Inc.
DC ELECTRICAL CHARACTERISTICS
Table 3 DC Electrical Characteristics
V
DD
= 5.0 V
10%, Ta = -10 to +80
C unless otherwise specified
Name
Symbol
Conditions
Min.
Typ.
Max.
Unit
Power Supply Voltage
V
DD
4.5
5.0
5.5
V
Driver High Output
V
DOH
Heater resistance: RL= 2 k
min.
24
28
V
Voltage
Heater resistance: RL= 5 k
min.
32
High Level Input
Voltage
V
IH
CLK: f
CLK
= fmax duty 50%
T
SUD
=T
HD
= 100 nsec
SI1, SI2: f
SI
= 1/2 fmax
0.8 V
DD
V
DD
V
Low Level Input Voltage
V
IL
LCHX: T
WLA
= 100 nsec
AEN1, AEN2, BEN, SW: DC level
GND
0.2 V
DD
V
High Level Input
I
IH
BEN
Note1
V
IH
= V
DD
17
55
A
Current
Other pins excl. BEN
V
IH
= V
DD
0.5
A
Low Level Input Current
I
IL
AEN1, AEN2, SW
Note2
V
IL
= GND
-55
-17
A
Other pins excl. AEN1, AEN2,
SW V
IL
= GND
-0.5
A
High Level Output
Voltage
V
OH
SO1, SO2 I
OH
= -0.5 mA
4.1
V
Low Level Output
Voltage
V
OL
SO1, SO2 I
OL
= 0.5 mA
0.4
V
Driver Low Output
Voltage
V
DOL
V
DD
= 5.0 V I
OL
= 15 mA
0.8
1.6
V
Driver Leakage Current
I
LEAK
V
DOH
= 28 V
1.0
A
Current Consumption
I
DD
f
CLK
= 4 MH
Z
SI1, SI2: fixed; SW: open
0.6
1.5
mA
f
CLK
= 4 MH
Z
SI1, SI2: HLHL; SW: open
2.2
3.5
mA
Current Consumption
During Standby
I
S
CLK, LCHX: GND;
Other input pins: open
SI1, SI2: fixed
0.1
0.3
mA
Low Power Supply
Voltage Detecting
Circuit
V
DET
0.8
2.8
4.0
V
Note1
A pull-down resistor is built in.
Note2
A pull-up resistor is built in.
128-bit THERMAL HEAD DRIVER
Rev. 1.1 S-4670A
Seiko Instruments Inc.
5
AC ELECTRICAL CHARACTERISTICS
Table 4 AC Electrical Characteristics
V
DD
= 5.0 V
10%, Ta = -10 to +80
C unless otherwise specified
Name
Symbol
Conditions
Min.
Typ.
Max.
Unit
CLK Pulse Width
T
WCLK
V
IH
= V
DD
, V
IL
= 0 V;
Rising and falling
edges at 10 nsec or
lower; Output load
RL = 1 M
CL = 3 pF
30
nsec
Data Setup Time
T
SUD
20
nsec
Data Hold Time
T
HD
20
nsec
Latch Pulse Width
T
WLA
30
nsec
Latch Setup Time
T
SULA
30
nsec
Latch Hold Time
T
HDLA
30
nsec
CLK-SO Propagation
Delay Time
T
DSO
25
40
nsec
EN-D0n Propagation
Delay Time
T
DDO
V
DOH
= 24 V
RL = 3000
1.0
sec
D0n Rising Time
T
RDO
V
DOH
= 24 V
RL = 3000
80
200
nsec
D0n Falling Time
T
FDO
V
DOH
= 24 V
RL = 3000
80
200
nsec
Clock Frequency
f
CLK
Single die
16
MHz
Cascade connection
16
MHz
TIMING CHART
LCHX
AEN1,2
SO1,2
"%.
DOn
50%
10%
90%
T
WLA
T
RDO
T
FDO
T
DDO
T
DD
T
DSO
CLK
SI1,2
1/f
CLK
T
HD
T
HDLA
T
SULA
T
SUD
WCLK
T
Figure 2 Timing Chart
128-bit THERMAL HEAD DRIVER
S-4670A Rev. 1.1
6
Seiko Instruments Inc.
QUALITY STANDARD
Table 5 Reliability Assessment Testing Specifications
No.
Test Item
Testing Conditions
Test Time
or
Frequency
LTFR
1
High Temperature and
High Humidity Bias
Ta = 85
C, RH = 85 %,
Vabs. Max
Note 1
0.9
1000 h
10%
2
High Temperature Bias
Ta = 125
C,
Vabs. max
Note1
0.9
1000 h
10%
3
High Temperature
Operation
Ta = 125
C
Vopr. max
Note2
1000 h
10%
4
Static Electricity
Resistance
C = 200 pF, V = 200 V,
V
SS
(or GND), V
DD
(or V
CC
) as
reference; Positive/Negative
Once
-
5
Latch-up
V =
100 V, C = 200 pF,
V = Vopr. max
Note2
Once
-
Note1
Vabs. max : Absolute maximum rating
Note2
Vopr. max : Maximum operating voltage
Remark:
Test samples are encapsuled in standard ceramic packages (resin is coated at humidity
resistance test).
128-bit THERMAL HEAD DRIVER
Rev. 1.1 S-4670A
Seiko Instruments Inc.
7
COORDINATES AND DIMENSIONS
Table 6-1 Pad Coordinates
Remark:
The origin is at the center of the die.
No.
Pin name
Coordinates
No.
Pin name
Coordinates
1
DO1
(
-3683.0 ,
218.5 )
43
DO43
(
-1247.0 ,
218.5 )
2
DO2
(
-3625.0 ,
317.5 )
44
DO44
(
-1189.0 ,
317.5 )
3
DO3
(
-3567.0 ,
218.5 )
45
DO45
(
-1131.0 ,
218.5 )
4
DO4
(
-3509.0 ,
317.5 )
46
DO46
(
-1073.0 ,
317.5 )
5
DO5
(
-3451.0 ,
218.5 )
47
DO47
(
-1015.0 ,
218.5 )
6
DO6
(
-3393.0 ,
317.5 )
48
DO48
(
-957.0 ,
317.5 )
7
DO7
(
-3335.0 ,
218.5 )
49
DO49
(
-899.0 ,
218.5 )
8
DO8
(
-3277.0 ,
317.5 )
50
DO50
(
-841.0 ,
317.5 )
9
DO9
(
-3219.0 ,
218.5 )
51
DO51
(
-783.0 ,
218.5 )
10
DO10
(
-3161.0 ,
317.5 )
52
DO52
(
-725.0 ,
317.5 )
11
DO11
(
-3103.0 ,
218.5 )
53
DO53
(
-667.0 ,
218.5 )
12
DO12
(
-3045.0 ,
317.5 )
54
DO54
(
-609.0 ,
317.5 )
13
DO13
(
-2987.0 ,
218.5 )
55
DO55
(
-551.0 ,
218.5 )
14
DO14
(
-2929.0 ,
317.5 )
56
DO56
(
-493.0 ,
317.5 )
15
DO15
(
-2871.0 ,
218.5 )
57
DO57
(
-435.0 ,
218.5 )
16
DO16
(
-2813.0 ,
317.5 )
58
DO58
(
-377.0 ,
317.5 )
17
DO17
(
-2755.0 ,
218.5 )
59
DO59
(
-319.0 ,
218.5 )
18
DO18
(
-2697.0 ,
317.5 )
60
DO60
(
-261.0 ,
317.5 )
19
DO19
(
-2639.0 ,
218.5 )
61
DO61
(
-203.0 ,
218.5 )
20
DO20
(
-2581.0 ,
317.5 )
62
DO62
(
-145.0 ,
317.5 )
21
DO21
(
-2523.0 ,
218.5 )
63
DO63
(
-87.0 ,
218.5 )
22
DO22
(
-2465.0 ,
317.5 )
64
DO64
(
-29.0 ,
317.5 )
23
DO23
(
-2407.0 ,
218.5 )
65
DO65
(
29.0 ,
218.5 )
24
DO24
(
-2349.0 ,
317.5 )
66
DO66
(
87.0 ,
317.5 )
25
DO25
(
-2291.0 ,
218.5 )
67
DO67
(
145.0 ,
218.5 )
26
DO26
(
-2233.0 ,
317.5 )
68
DO68
(
203.0 ,
317.5 )
27
DO27
(
-2175.0 ,
218.5 )
69
DO69
(
261.0 ,
218.5 )
28
DO28
(
-2117.0 ,
317.5 )
70
DO70
(
319.0 ,
317.5 )
29
DO29
(
-2059.0 ,
218.5 )
71
DO71
(
377.0 ,
218.5 )
30
DO30
(
-2001.0 ,
317.5 )
72
DO72
(
435.0 ,
317.5 )
31
DO31
(
-1943.0 ,
218.5 )
73
DO73
(
493.0 ,
218.5 )
32
DO32
(
-1885.0 ,
317.5 )
74
DO74
(
551.0 ,
317.5 )
33
DO33
(
-1827.0 ,
218.5 )
75
DO75
(
609.0 ,
218.5 )
34
DO34
(
-1769.0 ,
317.5 )
76
DO76
(
667.0 ,
317.5 )
35
DO35
(
-1711.0 ,
218.5 )
77
DO77
(
725.0 ,
218.5 )
36
DO36
(
-1653.0 ,
317.5 )
78
DO78
(
783.0 ,
317.5 )
37
DO37
(
-1595.0 ,
218.5 )
79
DO79
(
841.0 ,
218.5 )
38
DO38
(
-1537.0 ,
317.5 )
80
DO80
(
899.0 ,
317.5 )
39
DO39
(
-1479.0 ,
218.5 )
81
DO81
(
957.0 ,
218.5 )
40
DO40
(
-1421.0 ,
317.5 )
82
DO82
(
1015.0 ,
317.5 )
41
DO41
(
-1363.0 ,
218.5 )
83
DO83
(
1073.0 ,
218.5 )
42
DO42
(
-1305.0 ,
317.5 )
84
DO84
(
1131.0 ,
317.5 )
128-bit THERMAL HEAD DRIVER
S-4670A Rev. 1.1
8
Seiko Instruments Inc.
Table 6-2 Pad Coordinates
No.
Pin name
Coordinates
No.
Pin name
Coordinates
85
DO85
(
1189.0 ,
218.5 )
127
DO127
(
3625.0 ,
218.5 )
86
DO86
(
1247.0 ,
317.5 )
128
DO128
(
3683.0 ,
317.5 )
87
DO87
(
1305.0 ,
218.5 )
129
GND
(
3248.0 ,
-38.0 )
88
DO88
(
1363.0 ,
317.5 )
130
GND
(
2320.0 ,
-38.0 )
89
DO89
(
1421.0 ,
218.5 )
131
GND
(
1392.0 ,
-38.0 )
90
DO90
(
1479.0 ,
317.5 )
132
GND
(
464.0 ,
-38.0 )
91
DO91
(
1537.0 ,
218.5 )
133
GND
(
-464.0 ,
-38.0 )
92
DO92
(
1595.0 ,
317.5 )
134
GND
(
-1392.0 ,
-38.0 )
93
DO93
(
1653.0 ,
218.5 )
135
GND
(
-2320.0 ,
-38.0 )
94
DO94
(
1711.0 ,
317.5 )
136
GND
(
-3248.0 ,
-38.0 )
95
DO95
(
1769.0 ,
218.5 )
137
SI1
(
-2898.0 ,
-319.0 )
96
DO96
(
1827.0 ,
317.5 )
138
CLK
(
-2756.0 ,
-319.0 )
97
DO97
(
1885.0 ,
218.5 )
139
VDD
(
-2065.0 ,
-292.0 )
98
DO98
(
1943.0 ,
317.5 )
140
AEN1
(
-1672.0 ,
-319.0 )
99
DO99
(
2001.0 ,
218.5 )
141
BEN
(
-866.0 ,
-319.0 )
100
DO100
(
2059.0 ,
317.5 )
142
SO1
(
-105.0 ,
-319.0 )
101
DO101
(
2117.0 ,
218.5 )
143
SW
(
184.0 ,
-319.0 )
102
DO102
(
2175.0 ,
317.5 )
144
SI2
(
1069.0 ,
-319.0 )
103
DO103
(
2233.0 ,
218.5 )
145
LCHX
(
1695.0 ,
-319.0 )
104
DO104
(
2291.0 ,
317.5 )
146
AEN2
(
2040.0 ,
-319.0 )
105
DO105
(
2349.0 ,
218.5 )
147
VDD
(
2610.0 ,
-292.0 )
106
DO106
(
2407.0 ,
317.5 )
148
SO2
(
2838.0 ,
-319.0 )
107
DO107
(
2465.0 ,
218.5 )
108
DO108
(
2523.0 ,
317.5 )
109
DO109
(
2581.0 ,
218.5 )
110
DO110
(
2639.0 ,
317.5 )
111
DO111
(
2697.0 ,
218.5 )
112
DO112
(
2755.0 ,
317.5 )
113
DO113
(
2813.0 ,
218.5 )
114
DO114
(
2871.0 ,
317.5 )
115
DO115
(
2929.0 ,
218.5 )
116
DO116
(
2987.0 ,
317.5 )
117
DO117
(
3045.0 ,
218.5 )
118
DO118
(
3103.0 ,
317.5 )
119
DO119
(
3161.0 ,
218.5 )
120
DO120
(
3219.0 ,
317.5 )
121
DO121
(
3277.0 ,
218.5 )
122
DO122
(
3335.0 ,
317.5 )
123
DO123
(
3393.0 ,
218.5 )
124
DO124
(
3451.0 ,
317.5 )
125
DO125
(
3509.0 ,
218.5 )
126
DO126
(
3567.0 ,
317.5 )
* Pad size is 80
m by 80
m
128-bit THERMAL HEAD DRIVER
Rev. 1.1 S-4670A
Seiko Instruments Inc.
9
99
DO128
0.81 ,mm
20
58
80
4
99
58
DO1
DO2
GND
GND
GND
GND
GND
GND
GND
GND
VDD
SI1
AEN
VDD
CLK
SO1
BEN
SW
SI2
LCHX
AEN2
SO2
4
Other pads
80
m
80
m(passivation
opening)
T
Pad size:
Driver pads
80
m
80
m(passivation
opening)
* T
he die size used here is the
value prior to dicing.
T
Die thickness:
300
30
m
136
146
130
131
144
132
143
142
133
141
134
138
137
148
147
145
140
139
135
129
128
1
2
7.65mm
Fig. 3 Physical Dimensions
The information described herein is subject to change without notice.
Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein
whose related industrial properties, patents, or other rights belong to third parties. The application circuit
examples explain typical applications of the products, and do not guarantee the success of any specific
mass-production design.
When the products described herein are regulated products subject to the Wassenaar Arrangement or other
agreements, they may not be exported without authorization from the appropriate governmental authority.
Use of the information described herein for other purposes and/or reproduction or copying without the
express permission of Seiko Instruments Inc. is strictly prohibited.
The products described herein cannot be used as part of any device or equipment affecting the human
body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus
installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc.
Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the
failure or malfunction of semiconductor products may occur. The user of these products should therefore
give thorough consideration to safety design, including redundancy, fire-prevention measures, and
malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.
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