ROHM BD3823FV Technical data

Video / Audio Interfaces for TV and DVD Recorders

NTSC-PAL Audio I/O

TECHNICAL NOTE

Interface for Recording

BD3823FV

ƔDescription

BD3823FV is a low-noise (3.2ҏμVrms), low distortion (0.0015%), 5ch selector, incorporating a resistor-ladder type
volume.
Because of a wide power supply voltage range (7V to 14.5V), BD3823FV can meet a wide input voltage (to 4.5 Vms), and high S/N
can be achieved. In addition, the built-in volume does not add any distortion ratio characteristics, even when the attenution is varied,
and is applicable for high-quality audio systems.

ƔFeatures

1) A resistor-ladder type volume circuit is with a low distortion ratio (0.0015% with volume set to –6dB) and low noise (3.2 ȝVrms with
volume set to -6dB).

2) By grouping sound input terminals with output terminals, the PCB layout is reduced.

3) Small package SSOP - B20 achieves good crosstalk characteristicss (-110 dB).

4) The use of Bi-CMOS process enables low current consumption and energy saving design.

Because of low current consumption, BD3823FV has the advantage in quality over the scaling down of the internal regulators and
heat controls.

ƔApplications

DVD recorders

ƔAbsolute maximum rating (T

Parameter Symbol Limits Unit

Applied Voltage

Input voltage VIN
Power Dissipation Pd 810
Operating Temperature Topr
Storage Temperature Tastg

*1 Reduced by 6.5 mW/qC at 25qC or higher.

Thermal resistance Tja = 154 (°C/W), when Rohm standard board is mounted.
Rohm standard board: Size: 70701.6 (mm

*2 As long as voltage stays within operating voltage range, certain circuit operation is guaranteed in

the operating temperature range.
Allowable power loss conditions are related to temperature, to which care must be taken.
In addition though the standard value of its electrical characteristics cannot be guaranteed under
the conditions other than those specified, basic functions are maintained.

ƔOperating range (Basic operation at Ta=25)

Parameter Symbol Min. Typ. Max. Unit

Power supply voltage

*3 As long as temperature and operating voltage meet specifications

In addition, though the standard value of its electrical characteristics cannot be guaranteed under
the conditions other than those specified, basic functions are maintained.

a=25°C)

VCC 15.0

SCL, SDA 7.0

VCC+0.3GND-0.3

3

)

Material: FR4 glass-epoxy substrate (copper foil area: not more than 3%).

*

3

VCC 7.0 12.0 14.5 V

*

1

mW

-40䌾+85

-55+150

*

2

V

V

°C
°C

Ver.B Oct.2005

!

ƔElectrical characteristics

Unless otherwise specified, Ta=25, VCC=12V, f=1kHz, Vin=1Vrms, Rg=600Ԉ, R
Input terminal = Front 1, Output terminal = Out 1

Limits

Parameter Symbol

Min. Typ. Max.

Circuit Current upon no signal IQ - 2.5 10 mA VIN=0Vrms

L=10kԈ, Gain selector = 0dB, Volume = 0dB,

Unit Conditions

Voltage gain GV -1.5 0 1.5 КB GV=20log(V

Maximum output voltage VOM 3.0 3.6 - Vrms

Channel balance CB -1.5 0 1.5 dB

Total harmonic distortion THD - 0.0015 0.05 %

Output noise voltage * VNO - 3.2 16 ȝVrms

GENERAL

Residual output noise voltage * V

- 2 10 ȝVrms

NOR

Cross-talk between channels * CTC - -110 -80 dB

VOM at THD(V
BW=400Hz-30KHz

CB = G
GV1:ch1Gain, GV2:ch2 Gain

VIN=2Vrms,Volume=-6dB
BW=400Hz-30KHz

Volume=-6dB

g = 0ȍ, BW=IHF-A

R

Volume = -dB
Rg = 0ȍ, BW=IHF-A

Rg = 0ȍ
BW = IHF-A

OUT/VIN

OUT

V1-GV2

Input impedance RIN 77 110 143 kȍ 1pin-10pin terminal

Maximum input voltage VIM 3.1 3.6

1)

- Vrms

VIM at THD(V
BW=400Hz-30KHz

OUT

)=1%

1pin-10pin terminal

Rg = 0ȍ

Cross-talk between selectors * CTS - -110 -80 dB

Volume control range VV -32.5 -30.5 -28.5 dB

BW = IHF-A
CTS=20log(V

GV=20log(V
BW = IHF-A

OUT/VIN

OUT/VIN

Volume = -dB

Maximum attenuation * G

VOLUME

Step resolution G

- -106 -85 dB

V MIN

V STEP

- 0.5 - dB Volume=0-30.5dB

GV=20log(V
BW = IHF-A

OUT/VIN

)

)=1%

)

)

)

Attenuation set error G

-1.5 0 1.5 dB Volume=0-30.5dB

V ERR

Gain Selector=6dB

Maximum gain G

Step resolution G

GAIN SELECTOR

Gain set error G

4.5 6 7.5 dB

MAX

=500mVrms

V

IN

G=20log(V

- 2 - dB From 2dB to 4dB

STEP

-1.5 0 1.5 dB

ERR

OUT/VIN

)

ͰVP-9690A (average value detection, effective value display) filter by Matsushita Communication is used for * measurement.
ͰPhase between input/output is the same.
ͰThis IC is not designed to be radiation-resistant.

1)V

V

=2.5Vrms(TYP) at VCC=9VTHD(V

IM

=4.2Vrms(TYP) at VCC=14VTHD(V

IN

OUT

)=1%

OUT

)=1%

2/8

ƔTiming chart

Electrical specifications and timing of bus lines and I/O stages

㪪㪛㪘

㫋

㪙㪬㪝

㫋

㪣㪦㪮

㫋

㫋

㪩

㪝

㪪㪚㪣

㫋

㪧

㪟㪛㪒㪪㪫㪘

㪪

㫋

㪟㪛㪒㪛㪘㪫

㫋

㪟㪠㪞㪟

Fig.1 Timing Definition on I

㫋

㪪㪬㪒㪛㪘㪫㫋㪪㪬㪒㪪㪫㪘

2

C BUS

2

Table 1 . Characteristics of the SDA and SCL BUS lines for I

C BUS devices

Parameter Symbol

SCL clock frequency

1

Bus free time between a STOP and START condition

2

Hold time (repeated) START condition. After this period, the first clock

3

pulse is generated

LOW period of the SCL clock

4

HIGH period of the SCL clock

5

Set-up time for a repeated START condition

6

Data hold time

7

Data set-up time

8

Rise time of both SDA and SCL signals

9

Fall time of both SDA and SCL signals

10

Set-up time for STOP condition

11

Capacitive load for each bus line

12

The above numerical values all correspond to VIH min and VIL max levels (see Table 2).
*The input signals must internally provide at least 300 ns hold-time for SDA signals (at V
undefined region at the fall-end of SCL.

2

Table 2 . Characteristics of the SDA and SCL I/O stages for I

C BUS devices

㫋

㪟㪛㪒㪪㪫㪘

㪪㫉

㫋

㪪㪧

㫋

㪪㪬㪒㪪㪫㪦

㪤㪙㪚㪍㪈㪈

㪧

High speed mode

I2C BUS

Min. Max.

fSCL 0 400 kHz

tBUF 1.3 - ȝs

tHD;STA 0.6 - ȝs

tLOW 1.3 - ȝs

tHIGH 0.6 - ȝs

tSU;STA 0.6 - ȝs

tHD;DAT 0* - ȝs

tSU; DAT 100 - ns

tR 20+Cb 300 ns

tF 20+Cb 300 ns

tSU;STO 0.6 - ȝs

Cb - 400 pF

IH min of SCL signals) in order to cross over

Unit

High speed mode

Parameter

Symbol

I2C BUS

Min. Max.

Low-level input voltage : fixed input levels

13

Low-level input voltage : fixed input levels

14

Hysteresis of Schmitt trigger inputs: fixed input levels

15

VIL -0.5 1.0 V

VIH 2.3 - ȝs

Vhys n/a n/a V

16 Pulse width of spikes which must be suppressed by the input filter. tSP 0 50 ns

17 Low-level output voltage (open drain): at 3mA sink current VOL1 0 0.4 V

Output fall time from VIHmin. to VIHmax. with a bus capacitance from 10

18

pF to 400pF: with up to 3mA sink current at VOL1

Input current each I/O pin with an input voltage between 0.4V and 0.9

19

VCCmax.

tOF 20+0.1Cb 250 ns

Ii -10 10 ȝA

20 Capacitance for each I/O pin Ci - 10 pF

n/a = not applicable

3/8

Unit

2

C BUS FORMAT

I

MSB LSB MSB LSB MSB LSB

S Slave Address A Select Address A Data A P

1bit 8bit 1bit 8bit 1bit 8bit 1bit 1bit

S = Start condition (Recognition of start bit)

Slave Address = Recognition of slave address. 7 bits in upper order are voluntary.

Least significant bit is “L” for writing.

A = ACKNOWLEDGE bit (Recognition of acknowledgement)

Select Address Selection of volume, etc.

Data Data such as volume, etc.

P = Stop condition (Recognition of stop bit)

2

I

C BUS Interface Protocol

1 Basic form

S Slave Address A Select Address A Data A P

MSB LSB MSB LSB MSB LSB

2 Automatic increment (Select Address increases (+1) according to the number of data. 

S Slave Address A Select Address A Data1 A Data2 A

MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB

ᆯ [1] Data 1 shall be set as data of address specified by Select Address.

[2] Data 2 shall be set as data of address specified by Select Address +1.

[3] Data N shall be set as data of address specified by Select Address +N-1.

Slave Address

Because the slave address can be changed by the SELECT setting, it is possible to use two chips simultaneously on a single

control BUS .

GND  0.2×VCC

0.8×VCC  VCC

Set the SELECT voltage within the condition defined.

Data format

Items to be set

M S B L S B

SELECTvoltage condition A6 A5 A4 A3 A2 A1 A0 R/W

1 0 0 0 0 0 0 0
1 0 0 0 0 1 0 0

Select

Address

(HEX)

MSB Data LSB

D7 D6 D5 D4 D3 D2 D1 D0

¦¦¦¦

DataN A P

Input Selector 00

Volume ch1 01

Volume ch2 02

Gain Selector 03

*Don’t care

* * * * *

* *

* *

Volume attenuation ch1

Volume attenuation ch2

* * * * * *

4/8

Input Selector

Gain Selector

ƔApplication circuit diagram

V

CC

80HEX 84HEX

DVD

A/D

SELECT

㪉㪇㩷 㪈㪐㩷 㪈㪏㩷 㪈㪎㩷 㪈㪍㩷 㪈㪌㩷 㪈㪋㩷 㪈㪊㩷 㪈㪉㩷 㪈㪈㩷

OUT1 OUT2 V

㪚㪈㪌㩷

10ȝ

CC VRR FILTER AGND SCL SDA

㪚

㪈㪋

10ȝ

㩷

㪚

㩷

㪈㪊

10ȝ

㪊㪊㩷

㪚

10ȝ

㩷

㪈㪉

㩷

㪚

㪈㪈

10ȝ

1/2V

AGND

CC

I2C

LOGIC

VCC

Regulator

0䌾-30.5dB/0.5dB step -㺙 0䌾-30.5dB/0.5dB step -㺙

GAIN SELECTOR

0, 2, 4, 6dB㩷

INPUT

㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷 㪈㪈㪇㫂㩷

㪈㩷 㪉㩷 㪊㩷 㪋㩷 㪌㩷 㪍㩷 㪎㩷 㪏㩷 㪐㩷 㪈㪇㩷

1ȝ

㪚㪉㩷

㪚㪊㩷

1ȝ 1ȝ 1ȝ 1ȝ

㪚㪈㩷

㪚㪋㩷

㪚㪌㩷

㪚㪍㩷 㪚㪎㩷 㪚㪏㩷

1ȝ 1ȝ

1ȝ

㪚㪐㩷

1ȝ 1ȝ

Tuner1 Tuner2 EXT11 EXT12 EXT21 EXT22 EXT31 EXT32 Front2 Front1

Fig.2! Application Circuit Diagram

DGND

DGND

㩷

㪚㪈㪇㩷

Pin No. Pin Name Pin Description Pin No. Pin Name Pin Description

1 Front1 Front 1ch input terminal

2 Front2 Front 2ch input terminal

3 Tuner1 Tuner 1 ch input

4 Tuner2 Tuner 2 ch input

5 EXT11 External 1 1ch input terminal

6 EXT12 External 1 2ch input terminal

7 EXT21 External 2 1ch input terminal

8 EXT22 External 2 2ch input terminal

9 EXT31 External 3 1ch input terminal

10 EXT32 External 3 2ch input terminal

11 DGND

12 SDA

13 SCL

14 AGND

15 FILTER

16 VRR

17 V

18 OUT2

19 OUT1

20 SELECT

Ground ternial

I2C communication data terminal

2

C communication clock

I
terminal

Ground terminal

CC terminal

1/2V

Ripple filter terminal

Power supply terminal

CC

Volume 2ch output terminal

Volume 1ch output terminal

Slave address selection terminal

5/8

ƔReference dat a

-

p

-

-

-

-

q

y

y

㪌

㪋

㪊

㪉

㪈

㪨㪬㪠㪜㪪㪚㪜㪥㪫㩷㪚㪬㪩㪩㪜㪥㪫㩷㪑㩷㪠㪨㩷㪲㫄㪘㪴

㪇

㪇 㪌 㪈㪇 㪈㪌

㪧㪦㪮㪜㪩㩷 㪪㪬㪧㪧㪣㪰㩷㪑㩷㪭㪚㪚㩷㪲㪭㪴

Fig.3 Quiescent Current vs.

㪈㪇

85C

25C

40C

Power Supply!

㪈

㪇㪅㪈

㪇㪅㪇㪈

㪇㪅㪇㪇㪈

VOUT=VARIABLE
f=1kHz

㪫㪦㪫㪘㪣㩷㪟㪘㪩㪤㪦㪥㪠㪚㩷㪛㪠㪪㪫㪦㪩㪫㪠㪦㪥㩷㪑㩷㪫㪟㪛㪂㫅㩷㪲㩼㪴

㪇㪅㪇㪇㪇㪈

㪇㪅㪇㪇㪈 㪇㪅㪇㪈 㪇㪅㪈 㪈 㪈㪇

㪦㪬㪫㪧㪬㪫㩷㪭㪦㪣㪫㪘㪞㪜㩷㪑㩷㪭㪦㪬㪫㩷㪲㪭㫉㫄㫊㪴

Fig.6 Total harmonic distortion vs.

㪈㪇

㪏

㪍

㪋

VIN=100[mVrms]
FILTER=NONE

Output voltage

VCC=14.5V

VCC=12V

VCC=7V

㪉

㪇

㪞㪘㪠㪥㩷㪪㪜㪣㪜㪚㪫㪦㪩㩷㪭㪦㪣㪫㪘㪞㪜㩷㪞㪘㪠㪥㩷㪑㩷㪞㫍㩷㪲㪻㪙㪴

㪄㪉

㪈㪇 㪈㪇㪇 㪈㫂 㪈㪇㫂 㪈㪇㪇㫂

Frequency

㪈㪇

Rg=0[Ԉ]!
FILTER=DIN AUDIO

㪏

㪝㪩㪜㪨㪬㪜㪥㪚㪰㩷㪑㩷㪽㩷㪲㪟㫑㪴

Fig.9 Gain selector voltage gain vs.

㪍

㪋

㪉

㪦㪬㪫㪧㪬㪫㩷㪥㪦㪠㪪㪜㩷㪭㪦㪣㪫㪘㪞㪜㩷㪑㩷㪭㪥㪦㩷㪲㱘㪭㫉㫄㫊㪴

㪇

㪭㪦㪣㪬㪤㪜㩷㪘㪫㪫㪜㪥㪬㪘㪫㪠㪦㪥㩷㪑㩷㪘㪫㪫㩷㪲㪻㪙㪴

Fig.12 Volume attenuation vs.

voltage attenuation

6dB

4dB

2dB

0dB

㪈㪇

㪈

㪇㪅㪈

㪇㪅㪇㪈

㪇㪅㪇㪇㪈

㪫㪦㪫㪘㪣㩷㪟㪘㪩㪤㪦㪥㪠㪚㩷㪛㪠㪪㪫㪦㪩㪫㪠㪦㪥㩷㪑㩷㪫㪟㪛㪂㫅㩷㪲㩼㪴

㪇㪅㪇㪇㪇㪈

VOUT=VARIABLE
f=1kHz
FILTER=DIN AUDIO

㪇㪅㪇㪇㪈 㪇㪅㪇㪈 㪇㪅㪈 㪈 㪈㪇

㪦㪬㪫㪧㪬㪫㩷㪭㪦㪣㪫㪘㪞㪜㩷㪑㩷㪭㪦㪬㪫㩷㪲㪭㫉㫄㫊㪴

Fig.4 Total harmonic distortion vs.

Output Voltage

㪈

85C

25C

40C

㪈㪇

㪈

㪇㪅㪈

㪇㪅㪇㪈

㪇㪅㪇㪇㪈

VOUT=VARIABLE
f=1kHz
FILTER=DIN AUDIO

㪫㪦㪫㪘㪣㩷㪟㪘㪩㪤㪦㪥㪠㪚㩷㪛㪠㪪㪫㪦㪩㪫㪠㪦㪥㩷㪑㩷㪫㪟㪛㪂㫅㩷㪲㩼㪴

㪇㪅㪇㪇㪇㪈

㪇㪅㪇㪇㪈 㪇㪅㪇㪈 㪇㪅㪈 㪈 㪈㪇

㪦㪬㪫㪧㪬㪫㩷㪭㪦㪣㪫㪘㪞㪜㩷㪑㩷㪭㪦㪬㪫㩷㪲㪭㫉㫄㫊㪴

Fig.5 Total harmonic distortion vs.

ut voltage

Out

㪋

30dB

20dB

10dB

0dB

㪊

㪉

㪇㪅㪈

㪈

㪇

㪇㪅㪇㪈

㪫㪦㪫㪘㪣㩷㪟㪘㪩㪤㪦㪥㪠㪚㩷㪛㪠㪪㪫㪦㪩㪫㪠㪦㪥㩷㪑㩷㪫㪟㪛㪂㫅㩷㪲㩼㪴

㪇㪅㪇㪇㪈

㪈㪇 㪈㪇㪇 㪈㫂 㪈㪇㫂 㪈㪇㪇㫂

㪝㪩㪜㪨㪬㪜㪥㪚㪰㩷㪑㩷㪽㩷㪲㪟㫑㪴

Fig.7 Total harmonic distortion vs.

VIN=1[Vrms]
FILTER=LPF80[kHz]

㪄㪈

㪄㪉

㪭㪦㪣㪫㪘㪞㪜㩷㪞㪘㪠㪥㩷㪑㩷㪞㫍㩷㪲㪻㪙㪴

VIN=1[Vrms]

㪄㪊

FILTER=NONE

㪄㪋

㪈㪇 㪈㪇㪇 㪈㫂 㪈㪇㫂 㪈㪇㪇㫂

㪝㪩㪜㪨㪬㪜㪥㪚㪰㩷㪑㩷㪽㩷㪲㪟㫑㪴

Fig.8 Voltage gain vs. Frequenc

Frequency

㪌

VIN=1[Vrms]
FILTER=NONE

㪇

㪄㪌

㪄㪈㪇

㪄㪈㪌

㪄㪉㪇

㪄㪉㪌

㪄㪊㪇

㪭㪦㪣㪬㪤㪜㩷㪘㪫㪫㪜㪥㪬㪘㪫㪠㪦㪥㩷㪑㩷㪘㪫㪫㩷㪲㪻㪙㪴

㪄㪊㪌

㪈㪇 㪈㪇㪇 㪈㫂 㪈㪇㫂 㪈㪇㪇㫂

0dB-3dB, 0.5dB/step

-5dB-30dB, 5dB/step

㪝㪩㪜㪨㪬㪜㪥㪚㪰㩷㪑㩷㪽㩷㪲㪟㫑㪴

Fig.10 Volume attenuation vs.

Frequency

㪄㪍㪇

VIN=1[Vrms]
FILTER=LPF(80[kHz])

㪄㪎㪇

㪄㪏㪇

㪄㪐㪇

㪚㪩㪦㪪㪪㩷㪫㪘㪣㪢㩷㪑㩷㪚㪫㩷㪲㪻㪙㪴

㪄㪈㪇㪇

㪄㪋㪇㪄㪊㪇㪄㪉㪇㪄㪈㪇㪇

㪄㪈㪈㪇

㪈㪇 㪈㪇㪇 㪈㫂 㪈㪇㫂 㪈㪇㪇㫂

Fig.13 Cross Talk vs. Frequenc

2ch΂1ch

1ch΂2ch

㪝㪩㪜㪨㪬㪜㪥㪚㪰㩷㪑㩷㪽㩷㪲㪟㫑㪴

㪄㪍㪇

㪄㪎㪇

㪄㪏㪇

㪄㪐㪇

㪄㪈㪇㪇

㪄㪈㪈㪇

㪤㪘㪯㪠㪤㪬㪤㩷㪭㪦㪣㪬㪤㪜㩷㪘㪫㪫㪜㪥㪬㪘㪫㪠㪦㪥㩷㪑㩷㪘㪫㪫㩷㪲㪻㪙㪴

㪄㪈㪉㪇

㪈㪇 㪈㪇㪇 㪈㫂 㪈㪇㫂 㪈㪇㪇㫂

㪝㪩㪜㪨㪬㪜㪥㪚㪰㩷㪑㩷㪽㩷㪲㪟㫑㪴

VIN=1[Vrms]
FILTER=LPF(30[kHz])

Fig.11 Maximum volume attenuation vs.

Fre

uency

㪋

㪊㪅㪌

㪊

VCC=12[V]
f=1 [kHz]

㪉㪅㪌

㪉

㪈㪅㪌

㪈

㪇㪅㪌

㪇

㪤㪘㪯㪠㪤㪬㪤㩷㪦㪬㪫㪧㪬㪫㩷㪭㪦㪣㪫㪘㪞㪜㩷㪑㩷㪭㪦㪬㪫㩷㪲㪭㫉㫄㫊㪴

㪈㪇㪇 㪈㫂 㪈㪇㫂 㪈㪇㪇㫂

㪣㪦㪘㪛㩷㪩㪜㪪㪠㪪㪫㪘㪥㪚㪜㩷㪑㩷 㪩㪣㩷㪲㱅㪴

Fig.14 Maximum output voltage vs.

Load resistance

6/8

ƔHow to select application parts

Initial condition when power supply (17 pin) is turned ON

A circuit that carries out initialization in IC, when power supply (17 pin) is turned ON is incorporated. Settings are as shown in the
following table. However, it is recommended to transmit the data to all the addresses as initial data when power is turned ON, and
to apply mute while the initial data is input

Parameter Symbol

VCC rise time Trise 20 - - ȝS VCC rise time from 0V to 3V

VCC voltage when power on
reset is released.

Vpor - 2.6 - V

Min. Typ. Max.

Limits

Unit Conditions

Function Initial Condition
Input Selector Input MUTE
Volume
Gain SERECTOR 0dB

-dB

Signal input section

1) Setting for input coupling capacitor

In the signal input terminal, set the constant for the input coupling capacitor C(F), taking the input impedance R

IN

inside into account. This makes up the primary HPF characteristics of the RC.

C\F^!

RIN!

ȍ

SSH

Input terminal

Fig.15 Sigal input section

GAIN[dB^!

0

A(f)

F\Hz^!

2) SHORT mode of input

SHORT mode is a command to reduce resistance by setting impedance R
command is not chosen, switch S

is turned OFF. By using this command, it is possible to stop charging externally

SH

IN to switch S

ON. When SHORT

SH

mounted coupling capacitor C. Use SHORT mode when there is no signal since the SHORT mode turns ON the S
switch in order to achieve low impedance.

Ɣ Operation Notes

1. Numbers and data in entries are representative design values and are not guaranteed values of the items.

2. Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to verify
circuit characteristics for your particular application. Modification of constants for other externally connected circuits may cause
variations in both static and transient characteristics for external components as well as this Rohm IC. Allow for sufficient
margins when determining circuit constants.

3. Absolute maximum ratings

Use of the IC in excess of absolute maximum ratings, such as the applied voltage or operating temperature range (Topr), may
result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such
damage is suffered. A physical safety measure, such as a fuse, should be implemented when using the IC at times where the
absolute maximum ratings may be exceeded.

4. GND potential

Ensure a minimum GND pin potential in all operating conditions. Make sure that no pins are at a voltage below the GND at any
time, regardless of whether it is a transient signal or not.

5. Thermal design

Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd) in actual
states of use.

6. Short circuit between terminals and erroneous mounting

Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other components
on the circuits, can damage the IC.

7. Operation in strong electromagnetic field

Using the ICs in a strong electromagnetic field can cause operation malfunction.

!

(ȍ)

SH

7/8

ƔSelection of order type

B D 3 8 2 3 F V E 2

Part No.
BD3823FV

Tape and Reel information

SSOP-B20

<Dimension>

6.4 ± 0.3

1.15 ± 0.1

4.4 ± 0.2

0.1

0.65

6.5 ± 0.2

1

0.22 ± 0.1

111020

0.3Min.

0.15 ± 0.1

0.1

<Tape and Reel information>

Tape

Quantity

Direction
of feed

Embossed carrier tape

2500pcs

E2

(Correct direction: 1pin of product should be at the upper left when you hold
reel on the left hand, and you pull out the tape on the right hand)

1234

1234

1234

1234

1234

1234

㧔Unit:mm)

Reel

1pin

Direction of feed

Orders are available in complete units only.

1234

1234

The contents described herein are correct as of October, 2005
The contents described herein are subject to change without notice. For updates of the latest information, please contact and confirm with ROHM CO.,LTD.
Any part of this application note must not be duplicated or copied without our permission.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding
upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams and information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any
warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such
infringement, or arising from or connected with or related to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, implied right or license to practice or commercially exploit any intellectual property rights or other
proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer.
The products described herein utilize silicon as the main material.
The products described herein are not designed to be X ray proof.

Published by
Application Engineering Group

Catalog No.05T397Be '05. 10 ROHM C 1000 TSU

Appendix

Notes

No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.

The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.

Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.

ROHM Customer Support System

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Appendix1-Rev2.0