Quad Differential Receivers
BRF1A, BRF2A, BRS2B, BRR1A, and BRT1A
Data Sheet
April 2001
Electrical Characteristics (continued)
Table 3. Voltage and Current Characteristics
For variation in minimum VOH and maximum VOL over the temperature range, see Figure 8. TA = –40 °C to +125 °C.
Parameter
Sym
Min
Typ
Max
Unit
Output Voltages, VCC = 4.5 V:
Low, IOL = 8.0 mA
VOL
VOH
—
—
—
0.5
—
V
V
High, IOH = −400 µA
2.4
Enable Input Voltages:
1
Low, VCC = 5.5 V
VIL
—
2.0
—
—
—
—
0.7
—
V
V
V
1
High, VCC = 5.5 V
VIH
Clamp, VCC = 4.5 V, II = –5.0 mA
Differential Input Voltages, VIH – VIL:2
−0.80 V < VIH < 7.2 V, −1.2 V < VIL < 6.8 V
Input Offset Voltage
VIK
–1.0
1
VTH
—
0.1
0.02
0.1
0.20
0.05
0.15
V
V
V
VOFF
VOFF
Input Offset Voltage BRS2B
Output Currents, VCC = 5.5 V:
Off-state (high Z), VO = 0.4 V
Off-state (high Z), VO = 2.4 V
Short Circuit
IOZL
IOZH
—
—
—
—
—
–20
20
µA
µA
3
IOS
–25
–100
mA
Enable Currents, VCC = 5.5 V:
Low, VIN = 0.4 V
IIL
IIH
IIH
—
—
—
—
—
—
–400
20
µA
µA
µA
High, VIN = 2.7 V
Reverse, VIN = 5.5 V
100
Differential Input Currents, VCC = 5.5 V:
Low, VIN = –1.2 V
IIL
—
—
—
—
−1.0
mA
mA
High, VIN = 7.2 V
IIH
1.0
Differential Input Impedance (BRR1A):
Connected Between RI and RI
Differential Input Impedance (BRT1A)4
RO
R1
R2
—
—
—
110
60
—
—
—
Ω
Ω
Ω
90
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
R1
RI
RI
R2
12-2819.a(F)
Figure 2. BRT1A Terminating Resistor Configuration
Agere Systems Inc.
3
AGERE [ AGERE SYSTEMS ]
