u4090b-p ATMEL Corporation, u4090b-p Datasheet - Page 20

• Manufacturer Part Number: u4090b-p
• Description: U4090b-p Monolithic Integrated Feature Phone Circuit Emi Improved
• Manufacturer: ATMEL Corporation

8. Explanation of Abbreviations
20
U4090B-P
Table 7-4.
RECATT = Receive attenuation
STIS, STIL = Inputs of sidetone balancing amplifiers
ES = External supply
AFS = Acoustic feedback suppression control
AGA = Automatic gain adjustment
RA2 = Inverting receive amplifier
TXACL = Transmit anti-clipping control
Figure 8-1.
Figure 8-2.
Logic Level
0 = < (0.3V)
Z = > (1V) < (VMP – 1V) or (open input)
1 = > (VMP – 0.3V)
Specification of Logic Levels
Typical DC Characteristic
Typical Adjustment Range of Transmit Gain
12
10
47
49
43
41
39
53
51
45
37
35
8
6
4
2
0
0
0
10
5
20
10
30
RDC = 130k
15
40
I
L
RGT (k )
(mA)
50
20
60
RDC = infinity
25
70
30
80
RDC = 68k
35
90
100
40
4741C–CORD–11/05