bd6757kn ROHM Co. Ltd., bd6757kn Datasheet - Page 10

• Manufacturer Part Number: bd6757kn
• Description: 7ch System Lens Drivers For Digital Still Cameras / Single-lens Reflex Cameras
• Manufacturer: ROHM Co. Ltd.

●I/O Truth Table
© 2009 ROHM Co., Ltd. All rights reserved.
BD6757KN, BD6889GU
www.rohm.com
6) Digital transistor for photo-interrupter waveform shaping (BD6757KN and BD6889GU)
7) Voltage-regulator for photo-interrupter (BD6889GU)
BD6757KN and BD6889GU Full-ON Driver ch1 to ch6 I/O Truth Table
BD6757KN and BD6889GU Linear Constant-Current Driver ch7 I/O Truth Table
BD6889GU Digital Transistor I/O Truth Table
L: Low, H: High, X: Don't care, Z: High impedance
At CW, current flows from OUTA to OUTB. At CCW, current flows from OUTB to OUTA.
L: Low, H: High, X: Don't care, Z: High impedance
At CW, current flows from OUTA to OUTB. At CCW, current flows from OUTB to OUTA.
L: Low, H: High, X: Don’t care, OFF: GND (in the case of PNP), VCC (in the case of NPN)
PNPx output to SOxP terminal, NPNx output to SOxN terminal
Drive mode
Drive mode
The BD6757KN, and BD6889GU build in two digital NPN transistor circuits, and eight digital NPN and PNP transistor
circuits for photo-interrupter waveform shaping, respectively. The sensor signal, for lens position detection, is reshaped
and output to the DSP. The input (SIx pin) is a dividing resistance type, and provided with NPN output (SOxN pin) pull-up
resistor and PNP output (SOxP pin) pull-down resistor. This is so that VCC, and GND voltage will be NPN output, and
PNP output, respectively, when the input is open. In the case of the BD6889GU, DSW, DSEL1, and DSEL2 pins can
control the switching of NPN and PNP transistor. The inputs are provided with input pull-down resistor. This is so that
GND voltage will be input, when these three pins are open. (See I/O Truth Table; P.12/16)
The BD6889GU builds in voltage-regulator circuits for photo-interrupter. When High-level voltage is applied to SW pin,
the REG pin will be turned on. The input is provided with input pull-down resistor. This is so that REG pin will be turn off,
when the input is open.
EN/IN
Logic
IN/IN
DSW
H
H
H
H
L
INxA
IN7A
H
H
H
H
L
L
L
DSEL1
INPUT
INPUT
INPUT
H
H
X
L
L
INxB
IN7B
H
H
H
DSEL2
L
L
X
L
H
H
X
L
L
PNP1
OFF
OFF
OFF
ON
ON
OUTxA
OUT7A
H
H
Z
Z
L
L
L
10/15
NPN1
OUTPUT
OUTPUT
OFF
OFF
OFF
ON
ON
OUT7B
OUTxB
PNP2
OFF
OFF
OFF
ON
ON
H
H
Z
L
L
Z
L
NPN2
OFF
OFF
OFF
ON
ON
Standby
CW
CCW
Brake
Standby
CW
CCW
OUTPUT
Output mode
Output mode
PNP3
OFF
OFF
OFF
ON
ON
NPN3
OFF
OFF
OFF
ON
ON
Technical Note
2009.06 - Rev.A
PNP4
OFF
OFF
OFF
ON
ON
NPN4
OFF
OFF
OFF
ON
ON