BT8954 CONEXANT [Conexant Systems, Inc], BT8954 Datasheet - Page 84

• Manufacturer Part Number: BT8954
• Description: VOICE PAIR GAIN FRAMER
• Manufacturer: CONEXANT [Conexant Systems, Inc]

5.0 Electrical and Mechanical Specifications
5.1 Electrical Specifications
5.1.3 Electrical Characteristics
Table 5-3. Electrical Characteristics
5.1.4 DSL Interface Timing
Table 5-4. QCLK Timing Requirements
Figure 5-1. QCLK Timing
5-2
Symbol
Symbol
V
V
C
I
I
C
I
C
DD
PR
OZ
OH
I
1
2
3
OL
LD
IN
I
Z
Supply Current @ f
Supply Current @ f
Supply Current @ f
High-Level Output Voltage @ I
Low-Level Output Voltage @ I
Low-Level IRQ* Output Voltage @ I
Resistive Pullup Current
Input Leakage Current
Three-State Leakage Current
Input Capacitance
Output Capacitive Loading
High-Impedance Output Capacitance
QCLK Frequency
Clock Width High
Clock Width Low
QCLK
GCLK
GCLK
GCLK
The electrical characteristics are listed in
The QCLK timing requirements are displayed in
DSL interface timing are illustrated in
Parameter
Parameter
= 25 MHz
= 33 MHz
= 50 MHz
OL
OH
= 2 mA
= –200 uA
OD
= 1.0 mA
2
Conexant
1
Tqclk/2 – 20
Tqclk/2 – 20
Minimum
Minimum
3
Figures 5-1
0.080
–10
–10
2.4
—
—
40
—
—
—
Table
5-3.
Table
and 5-2.
5-4. QCLK timing and
Tqclk/2 + 20
Tqclk/2 + 20
Maximum
Maximum
Voice Pair Gain Framer
0.584
100
500
0.4
0.4
2.5
55
70
—
10
10
70
85
N8954DSC
Bt8954
Units
Units
MHz
mA
mA
mA
pF
pF
pF
ns
ns
V
V
V
A
A
A