HT95CXXX
Pin Name
Peripherals
DTMF
MUSIC
TIP
RING
RDET1
RTIME
LBIN
O
O
I
I
I
I/O
I
This pin outputs dual tone signals to dial out the phone number. The load resistor should
not be less than 5kW.
This pin outputs the single tone that is generated by the PFD generator.
Input pin connected to the tip side of the twisted pair wires. It is internally biased to 1/2
VDD when the device is in power-up mode. This pin must be DC isolated from the line.
Input pin connected to the ring side of the twisted pair wires. It is internally biased to 1/2
VDD when the device is in power-up mode. This pin must be DC isolated from the line.
This pin detects ring energy on the line through an attenuating network.
Schmitt trigger input and NMOS output pin which functions with RDET1 pin to make an
RC network that performs ring detection function.
This pin detects battery low through external R1/R2 to determine threshold voltage.
I/O
Description
Absolute Maximum Ratings
Supply Voltage ..........................V
SS
-0.3V
to V
SS
+5.5V
Input Voltage .............................. V
SS
-0.3
to V
DD
+0.3V
Storage Temperature ...........................-50°C to 125°C
Operating Temperature ..........................-20°C to 70°C
Note: These are stress ratings only. Stresses exceeding the range specified under
²Absolute
Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
Electrical Characteristics
Symbol
CPU
I
IDL
Idle Mode Current
5V
32768Hz off, 3.58MHz off,
CPU off, LCD off, WDT off,
no load
32768Hz on, 3.58MHz off,
CPU off, LCD off, WDT off,
no load
32768Hz on, 3.58MHz off,
CPU on, LCD off, WDT off,
no load
32768Hz on, 3.58MHz on,
CPU on, LCD on, WDT on,
DTMF generator off,
FSK decoder off, no load
¾
¾
¾
¾
¾
¾
¾
¾
2
Parameter
Test Conditions
V
DD
Conditions
Min.
Typ.
Max.
Ta=25°C
Unit
mA
I
SLP
Sleep Mode Current
5V
¾
17
30
mA
I
GRN
Green Mode Current
5V
¾
28
50
mA
I
NOR
Normal Mode Current
5V
¾
1.8
3
mA
V
IL
V
IH
I
OL
I
OH
R
PH
V
LBIN
I/O Port Input Low Voltage
I/O Port Input High Voltage
I/O Port Sink Current
I/O Port Source Current
Pull-high Resistor
Low Battery Detection
Reference Voltage
5V
5V
5V
5V
5V
5V
0
4
4
-2
10
1.05
¾
¾
6
-3
30
1.15
1
5
¾
¾
¾
1.25
V
V
mA
mA
kW
V
Rev. 1.50
7
May 26, 2005
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
