SC91710A(2001) 查看數據表（PDF） - Silan Microelectronics

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产品描述 (功能)

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SC91710A
(Rev.:2001)

TONE / PULSE SWITCHABLE DIALER WITH HANDFREE FUNCTION

Silan Microelectronics 

Silan

Semiconductors

TEST CIRCUIT

1 Operation

V+

current

A

keyboard

VDD

HKS

MODE

VSS

SC91710A/B

2 Standby V+

current

A

DP

VDD

HKS

DP

DT

VSS

3 Tone output voltage

V+

keyboard

VDD

VSS

TONE

HKS

counter

and

AC meter

10KΩ

4 Tone distortion

V+

keyboard

VDD

VSS

TONE

HKS

Spectrum

analyzer

V 10KΩ

5 Pulse output sink current

(open drain structure)

V+

Flash

key

VDD

PO

VSS HKS

A

VEXT

V

6 Pulse output sink current

(inverter structure)

V+

VDD

HKS

PO

VSS

A

V

VEXT

7 Keypad input current (row group)

V+

A

VDD

R*

ROW

C*

HKS VSS MODE

8 keypad input current (column group)

V+

VDD

R*

COLUMN

C*

A

HKS VSS MODE

Note: 1. Dist. (dB)=20log{[V12+V22+V32+…Vn2)1/2]/[(VL2+VH2)1/2]}

a. V1…Vn are extraneous frequencies (ie, inter modulation and harmonic), components in the 500Hz

to

3400Hz band.

b. VL,VH are the individual frequency components of DTMF signal.

c. Whether keyboard is pushed refer to the TONE mode time diagram.

2. Sink current Isink=I/(1-Duty Cycle), I is the net DC current measured from ampere meter.

3. R*, C* mean other column and row.

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

10

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