EM91810B EMC [ELAN Microelectronics Corp], EM91810B Datasheet - Page 7

• Manufacturer Part Number: EM91810B
• Description: TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
• Manufacturer: EMC [ELAN Microelectronics Corp]

TEST CIRCUIT
DIST.(dB)= 20log
Isink=I/(1-Duty Cycle) I is the net DC current measured from
ampere meter.
R* , C* mean others column and row.
* This specification are subject to be changed without notice.
1
5
7
3
**
10K
VEXT
BOARD
COUNTER
AND
AC METER
A
A
KEY
V
Column
TONE
HKS
PO
HKS
(V1)**2+(V2)**2+..+(Vn)**2
V+
A
V
DD
HKS
V
HKS
(VL)**2+(VH)**2
V
SS
DD
V
.
DD
V+
V
V
V
MODE
Operation current
Tone output voltage
DD
SS
+
V
Pulse output sink current(
open drain structure)
SS
V
V
SS
+
MODE
R
C
*
*
Flash Key
KEYBOARD
ENTRY
DP
DP
DT
TONE/PULES SWITCHABLE DIALER WITH LCD INTERFACE
a. V1....Vn are extraneous frequencies (ie, inter modulation and
b. VL,VH are the individual frequency components of the
c. Whether keyboard is pushed refer to the TONE mode time
2
4
10K
6
harmonic)
c o m p o n e n t s i n t h e 5 0 0 H z t o 3 4 0 0 H z b a n d .
DTMF signal
diagram
SPECTRUM
ANALYZER
A
V
TONE
HKS
ROW
V
V
A
DD
HKS
SS
V
V
DD
V+
DD
V+
V
V
+
SS
V
Standby current
Tone distortion
SS
Keypad input
HKS
MODE
C
R *
10.1.1997
EM91810A/B
*
KEYBOARD
ENTRY
7