CXB1585N Просмотр технического описания (PDF) - Sony Semiconductor
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CXB1585N Datasheet PDF : 14 Pages
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CXB1585N
2. ECL input circuit
The ECL differential input pins are biased to VBB (VCC – 1.3V) via an 18kΩ resistor in the IC. See the figures
below for ECL differential input methods.
VCC = 3.3V, VEE = GND
VCC = 3.3V, VEE = GND
VBB (VCC – 1.3V)
18kΩ
3.3V ECL output buffer
160Ω
160Ω
18kΩ
ECL differential input buffer
(a) ECL differential signal from 3.3V ECL output buffer
VCC = GND, VEE = –4.5V
VCC
220kΩ
330pF
VCC = 3.3V, VEE = GND
18kΩ
VBB (VCC – 1.3V)
ECL100K output buffer
330Ω
330pF
330Ω
VEE
18kΩ
ECL differential input buffer
(b) ECL differential signal from ECL 100K output buffer
50Ω
TRANS.
LINE
VCC
220kΩ
330pF
VCC = 3.3V, VEE = GND
VBB (VCC – 1.3V)
18kΩ
330pF
50Ω
50Ω
18kΩ
VTT (VCC – 2V)
ECL differential input buffer
(c) ECL differential signal from 50Ω transmission line
VCC
220kΩ
330pF
VCC = 3.3V, VEE = GND
18kΩ
VBB (VCC – 1.3V)
50Ω
TRANS.
LINE
50Ω
330pF
VTT (VCC – 2V)
18kΩ
ECL differential input buffer
(d) ECL single signal from 50Ω transmission line
Fig. 2. ECL Input Circuits
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