Pin Name
I/O
Description
Peripherals
DTMF
O
This pin outputs dual tone signals to dial out the phone number. The load resistor should
not be less than 5k .
MUSIC
O
This pin outputs the single tone that generated by the PFD generator.
TIP
I
Input pin connected to the tip side of the twisted pair wires. It is internally biased to 1/2
VDD whenthedeviceisinpower-upmode.ThispinmustbeDCisolatedfromtheline.
RING
I
Input pin connected to the ring side of the twisted pair wires. It is internally biased to 1/2
VDDwhenthedeviceisinpower-upmode.ThispinmustbeDCisolatedfromtheline.
RDETI
I
This pin detects ring energy on the line through an attenuating network.
RTIME
I/O
Schmitt trigger input and NMOS output pin which functions with RDETI pin to make an
RC network that performs ring detection function.
LBIN
I
This pin detects battery low through external R1/R2 to determine threshold voltage.
Absolute Maximum Ratings
Supply Voltage ........................................ 0.3V to 5.5V
Storage Temperature ........................... 50 C to 125 C
Input Voltage .............................. V
SS
0.3 to V
DD
+0.3V
Operating Temperature .......................... 25 C to 70 C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings 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
Ta=25 C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
CPU
I
IDL
Idle Mode Current
5V
32768Hz off, 3.58MHz off,
CPU off, LCD off, WDT off,
no load
2
A
I
SLP
Sleep Mode Current
5V
32768Hz on, 3.58MHz off,
CPU off, LCD off, WDT off,
no load
30
A
I
GRN
Green Mode Current
5V
32768Hz on, 3.58MHz off,
CPU on, LCD off, WDT off,
no load
50
A
I
NOR
Normal Mode Current
5V
32768Hz on, 3.58MHz on,
CPU on, LCD on, WDT on,
DTMF generator off,
FSK decoder off, no load
3
mA
V
IL
I/O Port Input Low Voltage
5V
0
1
V
V
IH
I/O Port Input High Voltage
5V
4
5
V
I
OL
I/O Port Sink Current
5V
4
6
mA
I
OH
I/O Port Source Current
5V
2
3
mA
R
PH
Pull-high Resistor
5V
10
30
k
V
LBIN
Low Battery Detection
Reference Voltage
5V
1.10
1.15
1.20
V
HT95C200/20P/300/30P
Rev. 0.10
6
October 1, 2002
Preliminary