REJ03F0262-0100
Rev. 1.00
Jan. 16. 2008
R8A66161DD/SP
16-BIT LED DRIVER WITH SHIFT REGISTER AND LATCH
DESCRIPTION
R8A66161 is a LED array driver having a 16-bit serial input and parallel output shift register function with
direct coupled reset input and output latch function.
This product guarantees the output current of 24mA (Vcc =5V case) which is sufficient for anode common
LED drive, capable of following 16-bits continuously at the same time. Parallel output is open drain output.
In addition, as this product has been designed in complete CMOS, power consumption can be greatly
reduced when compared with conventional BIPOLAR or Bi-CMOS products. Furthermore, pin layout ensures
the realization of an easy printed circuit. R8A66161 is the succession product of M66311.
FEATURES
● Anode common LED drive
● VCC 5V or 3.3V single power supply
● High output current: all parallel outputs QA~ QP IOL=24mA (at VCC =5.0V) IOL=12mA (at VCC =3.3V)
simultaneous lighting available
● Low power dissipation: 100uW/package (max) (VCC=5.0V, Ta=25℃, quiescent state)
● High noise margin: Schmitt input circuit provides responsiveness to a long line length
● Equipped with direct-coupled reset
● Open drain output: (except serial data output SQP)
● Wide operating temperature range: Ta=-40oC~+85oC
● Pin layout facilitates printed circuit wiring. (This layout facilitates cascade connection and LED connection)
APPLICATION
● LED array drive, The various LED display modules
● PPC, Printer, VCR, Mini-compo, Button-Telephone etc. All of LED display equipment
BLOCK DIAGRAM
LOGIC DIAGRAM
SERIAL
DATA
OUTPUT
PARALLEL DATA OUTPUTS
QB
QC
QD
QE
QF
QG
QH
QI
QJ
QK
QL
QM
QN
QO
QP
SQP
1
2
24
23
22
21
20
19
18
17
16
15
14
13
11
12
10
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
Q
CK
D S
OE
A
ENABLE SERIAL
INPUT
DATA
INPUT
DATA signal
OE signal
PARALLEL
DATA
OUTPUTS
QA∼QP
OUTPUT FORMAT
REJ03F0262-0100 Rev.1.00 Jan.16.2008
page 1 of 7
SERIAL
DATA
OUTPUT
SQP
S
4
S
S
5
Vcc
3
S
S
QA
8
7
6
CKS
9
R CKL GND
SHIFT DIRECT LATCH
CLOCK RESET CLOCK
INPUT INPUT INPUT
