U4091BM-RFNY19 Atmel, U4091BM-RFNY19 Datasheet - Page 8

• Manufacturer Part Number: U4091BM-RFNY19
• Description: RF Wireless Misc COM.CORDED - FEATURE PHONE CIRCUIT
• Manufacturer: Atmel
• Type: Programmable Telephone Audio Processorr

Specifications of U4091BM-RFNY19

• Operating Frequency: 100 KHz
• Operating Temperature Range: - 55 C to +150 C
• Package / Case: SSO-44
• Mounting Style: SMD/SMT

5. Ringing Power Converter (RPC)
6. Ringing Frequency Detector (RFD)
7. Clock Output Divider Adjustment
8
Atmel U4091BM-R
The RPC transforms the input power at VRING (high voltage/low current) into an equivalent
output power at VB (low voltage/high current) which is capable of driving the low-ohmic loud-
speaker. The input impedance at VRING is adjustable from 3kΩ to 12kΩ by R
(Z
The Atmel
always double the value of the input signal (ringing frequency). It is generated by a current
comparator with hysteresis. The levels for the on-threshold are programmable in 16 steps, the
off-level is fixed. Every change of the comparator output generates a high level at the interrupt
output INT. The information can then be read out by means of a serial bus with either normal
or fast read mode. The block RFD is always enabled.
Table 6-1.
The pin OSCOUT is a clock output which is derived from the crystal oscillator. It can be used
to drive a microcontroller or another remote component and thereby reduces the number of
crystals required. The oscillator frequency can be divided by 1, 8, 16, or 32. During power-on
reset, the divider will be reset to 1 until it is changed by setting the serial bus.
Table 7-1.
RING
= R
®
IMPA
CLK[0:1]
U4091BM-R provides an output signal for the microcontroller. This output signal is
Threshold Level
Clock Output
/ 100) and the efficiency of the step-down converter is approximately 65%.
0
1
2
3
RINGTH[0:3]
Step
15
0
Divider
16
32
1
8
V
22V
7V
1V
RING
Frequency
3.58MHz
447kHz
224kHz
112kHz
4872B–CORD–01/11
IMP A