Data Sheet
April 2001
Quad Differential Receivers
BRF1A, BRF2A, BRS2B, BRR1A, and BRT1A
Electrical Characteristics
(continued)
Table 3. Voltage and Current Characteristics
For variation in minimum V
OH
and maximum V
OL
over the temperature range, see Figure 8. T
A
= –40 °C to +125 °C.
Parameter
Output Voltages, V
CC
= 4.5 V:
Low, I
OL
= 8.0 mA
High, I
OH
=
−400
µA
Enable Input Voltages:
Low, V
CC
= 5.5 V
High, V
CC
= 5.5 V
Clamp, V
CC
= 4.5 V, I
I
= –5.0 mA
Differential Input Voltages, V
IH –
V
IL
:
2
−0.80
V < V
IH
< 7.2 V,
−1.2
V < V
IL
< 6.8 V
Input Offset Voltage
Input Offset Voltage BRS2B
Output Currents, V
CC
= 5.5 V:
Off-state (high Z), V
O
= 0.4 V
Off-state (high Z), V
O
= 2.4 V
Short Circuit
Enable Currents, V
CC
= 5.5 V:
Low, V
IN
= 0.4 V
High, V
IN
= 2.7 V
Reverse, V
IN
= 5.5 V
Differential Input Currents, V
CC
= 5.5 V:
Low, V
IN
= –1.2 V
High, V
IN
= 7.2 V
Differential Input Impedance (BRR1A):
Connected Between RI and RI
Differential Input Impedance (BRT1A)
4
R
O
R
1
R
2
—
—
—
110
60
90
—
—
—
Ω
Ω
Ω
I
IL
I
IH
—
—
—
—
−1.0
1.0
mA
mA
I
IL
I
IH
I
IH
—
—
—
—
—
—
–400
20
100
µA
µA
µA
I
OZL
I
OZH
I
OS
3
—
—
–25
—
—
—
–20
20
–100
µA
µA
mA
V
TH
1
V
OFF
V
OFF
—
0.1
0.02
0.1
0.20
0.05
0.15
V
V
V
V
IL
1
V
IH
1
V
IK
—
2.0
—
—
—
—
0.7
—
–1.0
V
V
V
V
OL
V
OH
—
2.4
—
—
0.5
—
V
V
Sym
Min
Typ
Max
Unit
1. The input levels and difference voltage provide zero noise immunity and should be tested only in a static, noise-free environment.
2. Outputs of unused receivers assume a logic 1 level when the inputs are left open. (It is recommended that all unused positive inputs
be tied to the positive power supply. No external series resistor is required.)
3. Test must be performed one lead at a time to prevent damage to the device.
4. See Figure 2.
R1
RI
R1
RI
R2
12-2819.a(F)
Figure 2. BRT1A Terminating Resistor Configuration
Agere Systems Inc.
3
AGERE [ AGERE SYSTEMS ]
