ROHM BA823F, BA823 Datasheet
1
Standard ICs
8-bit, serial IN, parallel OUT driver
BA823 / BA823F
The BA823 and BA823F are 8-bit serial input, parallel output drivers. These monolithic ICs were developed as
drivers for thermal printing heads, LED character displays, and other similar applications.
•
Applications
Thermal printing head drivers
LED character display drivers
•
Features
•
Block diagram
•
Absolute maximum ratings (Ta = 25°C)
1
15
2
3
13
4
14
S
D
I
C
12 11 10 9 8 7 6
5
O
0 O1 O2 O3 O4 O5 O6 O7
16
V
CC
GND1
GND2
GND
(Dig)
DQCDQCDQCDQCDQ
CDQCDQCDQC
STROBE INPUT
DATA INPUT
SHIFT PULSE
DATA OUTPUT Do
1) Can drive up to 200 mA.
2) Controlling the strobe terminal with the drive timing
pulse enables current to be reduced when drive is
not being carried out.
3) Using the data output terminal for the next data input
enables cascade connections.
4) The digital ground and power ground are separated.
5) TTL and CMOS drive possible.
Parameter Symbol Limits Unit
V
CC 7.0
∗
1
V
BA823
Pd
550
∗
2
mW
BA823F 500
∗
3
V
IN Max. + 0.3 ~ + 6.0 V
Topr – 20 ~ + 75 °C
Tstg – 55 ~ + 125 °C
Power supply voltage
Power dissipation
Input voltage
Operating temperature
Storage temperature
∗
1 O0 to O7 output pins are 34V (max.).
∗
2 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
∗
3 Reduced by 5mW for each increase in Ta of 1°C over 25°C.
2
Standard ICs BA823 / BA823F
•
Usage conditions range
200
100
0
01020
OUTPUT CURRENT : IOUT (mA)
SUPPLY VOLTAGE : VCC (V)
Fig. 1 Power supply voltage and output current
usage conditions (Per Circuit)
The maximum usage conditions, shown on the
left, indicate the absolute maximums for power
supply voltage and IC output current. Never
exceed these usage conditions, under any
circumstances.
Fig. 1 Power supply voltage and
output current usage conditions
Max. usage conditions
Usage conditions
range
•
Electrical characteristics (unless otherwise noted, Ta = 25°C, VCC = + 5.0V)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
VCC 4.5 5.0 5.5 V Fig.2
I
Q1 — 4 6 mA Fig.2
I
Q2 — 8 11 mA Fig.2
V
IL ——0.8 V Fig.2
V
IH 2 ——V Fig.2
I
IH ——0.4 mA Fig.2
I
IH ——100 µ
A Fig.2
V
O OFF ——21.8 V Fig.3
V
O ON — 0.8 1.3 V Fig.3
I
OL ——207 mA Fig.3
V
DOH
2.4
——V
Fig.3
V
DOL ——0.8 V Fig.3
t
1 ——300 ns
—
t
2 —— 1 µ
s
—
t
3 —— 1 µ
s
—
f
Max. 500 ——kHz
—
Power supply voltage
Quiescent current 1
Quiescent current 2
Input low level voltage
Input high level voltage
Input high level current
Input high level current
Maximum output voltage
Output saturation voltage
Output current
"H" level data output voltage
"L" level data output voltage
Minimum setup time
Minimum shift pulse width
Minimum timing time
Maximum data transfer speed
—
—
R
L
= 10kΩ
—
V
IH
= 2.0V, VIL = 0.8V
V
IH
= 2.0V, VIL = 0.8V
V
IH
= 2.0V, VIL = 0.8V
V
IH
= 2.0V, VIL = 0.8V
V
CC pin
When all data values are "0"
When all data values are "0"
V
IN = 4.5 V
V
IN = 2.0 V
O
0 to O7 pins, IO = 10µA
When I
O = 100mA sink
Applied voltage V = 11.8V
3
Standard ICs BA823 / BA823F
•
Measurement circuits
VCC = 5.0V
PG
1
1
3
2
2
SW
2
SW1
VIN = 4.5V
BA823 / F
A
A
Data should be left at "0"
After 8 or more pulses have elapsed
Fig. 2 ICC and IIH measurement circuit
VCC = 5.0V
1
2
SW
1
SW3
SW2
100mA
82Ω
V
A
IO
21
8
7
6
54
3
2
1
BA823 / F
PG
A
After 8 or more pulses have elapsed
Fig. 3 VO ON, VO OFF and IOL measurement circuit
Item
I
CC 11
I
IH 21 ~ 3
SW
1 SW2
Item
V
O ON 11 ~ 81
I
OL 11 ~ 82
V
O OFF 21 ~ 82
SW
1 SW2 SW3
When tested at VO OFF : IO = 10µA
When tested at I
O ON : VA = 30V
•
Input conditions
t1 t2
t3
Fig. 4
Data input
D
1
Shift pulse
C
Print pulse
S
Loading...