IEEE Std 1194.1-1991 IEEE Standard for Electrical Characteristics
of Backplane Transceiver Logic (BTL) Interface Circuits -Description
Abstract: The electrical
characteristics of digital interface circuits (drivers, receivers,
or transceivers) used to drive a backplane bus, which appears as
a transmission line to the interface circuit, are specified in order to
ensure proper electrical functioning with respect to timing and
noise constraints. The performance requirements of buses using these
interface circuits make it necessary to impose constraints beyond
those normally encountered in a specification for backplane buses.
These constraints are imposed to (1) optimize the system to accommodate
the physical behavior of high-speed signals traveling between boards
in a transmission line environment; (2) minimize backplane propagation
delay and backplane propagation skew between these signals to attain
the required performance; and (3) minimize crosstalk to attain the
required reliability of information transfer.
Keywords: backplane, backplane bus, backplane transceiver logic, BTL, digital
interface circuit, driver, receiver, transceiver, transmission line
Content
1. Description
2. Reference
3. Specification
3.1 Signal Voltage
Level Requirement
3.2 Interface
Circuit Capacitance
3.3 Interface
Circuit Leakage
3.4 Drivers
3.4.1 Driver Types
3.4.2 Static Load
Current
3.4.3 Driver VOH.
3.4.4 Driver VOL.
3.4.5 Transition
Times
3.5 Receivers
3.5.1 Thresholds
3.5.2 Noise Rejection
3.5.3 Input Clamps
3.6 Typical
Implementation
3.7 Recommended
Options for Live Insertion BTL Interface Circuits
3.7.1 Live Insertion VCC Bias Pin.
3.7.2 Live Insertion
Interface Circuit Capacitance
3.7.3 Live Insertion
Interface Circuit Bias Voltage
