82V1074PFG IDT, Integrated Device Technology Inc, 82V1074PFG Datasheet - Page 18

• Manufacturer Part Number: 82V1074PFG
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82V1074PFG

• Number Of Channels: 4
• On-hook Transmission: Yes
• Polarity Reversal: Yes
• On-chip Ring Relay Driver: Yes
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TQFP
• Operating Temperature Classification: Industrial
• Pin Count: 100
• Mounting: Surface Mount
• Operating Current: 95mA
• Operating Supply Voltage (max): 3.465V
• Operating Supply Voltage (min): 3.135V
• Lead Free Status / RoHS Status: Compliant

3.2.5
DC_FEED bit in register LREG5 is set to 1, the default DC feeding
characteristic will be selected (see
is typically for -24 V battery voltage application. When the DC_FEED bit
is set to 0, the DC feeding characteristic is determined by the
coefficients written in the Coe-RAM.
DC feeding. When users input the desired values for I
V
coefficients. When these coefficients are loaded to the Coe-RAM, the
DC feeding characteristic will meet the requirements.
recommended to reduce I
than 5 kΩ when the loop is operated in the constant current zone.
RSLIC & CODEC CHIPSET
K2
The DC feeding characteristic is programmable. When the
IDT provides a software (Cal74) that can calculate the coefficients for
To reduce power consumption and make the DC loop stable, it is
Here is an example for short loop applications (see
R
and V
I
= |(V
I
TIP-RING
Loop resistance < 600 Ω;
I
V
I
MAX
K1
K1
K1
LIM,
= 20 mA (loop current requirement)
DC FEEDING CHARACTERISTICS CONFIGURATION
= 20 V;
– 0)/(I
= 25 mA;
Cal74 will automatically calculate the DC feeding
Figure - 5 Constant Voltage Zone
K1
– I
MAX
MAX
)| = |(20 – 0)/(20 – 25)| = 4 kΩ
and keep the output resistance (R
Figure -
R
V
6). The default configuration
R
L
Figure -
Max,
I
V
K1,
TIP-RING
7):
V
K1,
I
) less
I
K2,
18
I
Figure - 7 DC Feeding Configuration Example for Short Loop
Max
I
I
I
K1
K2
TIP-RING
(25 mA)
Figure - 6 DC Feeding Characteristics Configuration
I
MAX
I
K1
(25 mA)
(20 mA)
14mA
I
TIP-RING
IDT82V1671/IDT82V1671A, IDT82V1074
V
K1
Applications
R
(20 V)
I
V
K1
(18 V, 23 mA)
R
LIN
V
36
K2
(19.5 V, 16 mA)
40 48
R
V
V
LIM
(22 V)
V
TIP-RING
V
TIP-RING