T8531A/T8532 Agere Systems, Inc., T8531A/T8532 Datasheet - Page 25

• Manufacturer Part Number: T8531A/T8532
• Description: Multichannel Programmable Codec Chip Set
• Manufacturer: Agere Systems, Inc.

May 2001
Agere Systems Inc.
Electrical Characteristics
For all specifications: T
T
49.152 MHz.
dc Characteristics
Table 8. Digital Interface
Table 9. Analog Interface
Input Voltage
Output Voltage
Input Current
Output Current in High-impedance
Input Resistance
Input Resistance
Common-mode Reference Voltage VVRTX
CMT Input Sink Current
Input Voltage Swing
Load Resistance at VRP and VRN
Load Capacitance
Output Resistance
Output Offset Voltage Between
Output Offset Voltage Between
Output Voltage Swing (differential)
A
State
(dependent on the setting
of the termination impedance)
(differential)
VRP and VRN
VRP and VRN, Powerdown
= 25 C and V
Parameter
Parameter
DD
Pins Without a
= 5 V. Input signal frequency is 1020 Hz, unless otherwise noted. DSP clock frequency is
Pins with a
Pins with a
Pull-down
Pull-down
Pull-up or
Pull-up
A
= –40 C to +85 C, V
High
High
High
High
High
Low
Low
Low
Low
Low
Symbol
VOSPD
RVRTX
VRSW
IVRTX
—
RVTX
VVTX
VOS
RO
RL
CL
Symbol
V
DD
V
V
V
V
I
OHC
I
I
I
I
I
I
OZ
IH
IH
IH
OH
IL
IL
IL
OL
IH
IL
Digital pattern corresponding to idle
= 5 V
Digital input code corresponding to
RL = 100 k
0 dBm PCM code at 1.02 kHz
CL from VRP or VRN to V
Channel powered down
UPDO, SDX –40 C to 0 C
0.25 V < VTX < 4.75 V
UPDO, SDX 0 C to 85 C
2.3 V < VRTX < 2.5 V
2.3 V < VRTX < 2.5 V
5%, unless otherwise noted. Typical values are for
10 A max dc load
PCM code ( -law)
TTL-compatible inputs
TTL-compatible inputs
Test Conditions
Test Conditions
receive gain
GND < V
GND < V
GND < V
V
V
V
I
IH
IH
IH
differential maximum
I
L
I
L
L
= –320 A
= –10 mA
< V
< V
< V
—
—
—
= 10 mA
IN
IN
IN
IN
IN
IN
< V
< V
< V
< V
< V
< V
DD
DD
DD
IL
IL
IL
SSA
–120
Min
–10
–10
–30
–10
2.0
2.4
3.5
—
—
—
—
–100
2
5.28
Min
–20
4.0
10
2.2
—
—
—
—
7
Codec Chip Set
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
Typ
2.4
—
—
—
—
—
—
—
0
2
0
Max
120
Max
0.7
0.4
400
100
100
10
–2
10
30
10
2.6
3.2
—
—
—
—
—
10
20
—
—
—
—
Vp-p
Vp-p
Unit
Unit
M
mV
mV
k
k
pF
V
V
V
V
V
V
A
A
A
A
A
A
A
A
A
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