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S E M I C O N D U C T O R, I N C .
TQ8213
The TQ8213 is a SONET/SDH OC48 MUX that time-division multiplexes a
16-bit or 32-bit parallel data bus to a serial 2.48832 Gb/s NRZ data stream
for transmission through a communications channel. Without any
additional amplification, the 2.48832 Gb/s output stage can drive either a
directly modulated laser or an optical external modulator. Output may also
be configured to provide standard ECL/PECL levels with excellent rise/fall
times. The serial output data stream is available through either single-
ended or differential pins. Mark/space ratio adjustment allows
compensation for asymmetries encountered in optoelectronics.
The TQ8213 operates in two different time-division multiplexing modes,
making it extremely flexible for use in telecom and datacom applications.
The serial 2.48832 Gb/s data stream can be generated from either a 16-bit
wide 155.52 MHz data stream or a 32-bit wide 77.76 MHz data stream.
Data integrity may be ensured through a byte-wise parity check, which
occurs in parallel with the incoming data stream. An external parity alarm
is set whenever a parity check error is detected.
Transmit clocking is selectable from either an internal or external Voltage
Controlled Oscillator(VCO) as well as a selectable external or internal Phase
Locked Loop (PLL). The selected clock source may be monitored at
HCKOUT. The internal PLL utilizes an external reference clock, REFCLK, to
aid in timing generation. The reference clock may be one of seven
commonly used system frequencies. A TTL level LOCK signal is supplied
to indicate when the phase difference between the external reference clock
and the internal divided down clock is less than
π/4
radians.
Operating from a single +5V supply, the TQ8213 will provide fully
compliant functionality and performance. Direct-connected TTL levels are
used with both of the input modes.
The TQ8213 is fully compliant with SONET/SDH jitter specifications.
PRELIMINARY DATA SHEET
OC48/STM16
Multiplexer
Features
• Single-chip 16:1 or 32:1
Multiplexer with integrated clock-
synthesis and high performance
75mA/3.75V output driver
• Output can drive external optical
modulator, 50
Ω
PECL/ECL
transmission line, or directly
modulated laser without further
amplification
• Output symmetry adjust
• Selectable internal/external active
highspeed 2.48832 GHz clock
• SONET/SDH compliant for
2.48832 Gb/s output data rate
• 622.08, 311.04, 155.52, 77.76,
51.84, 38.88, or 19.44 MHz
PECL or TTL reference clock
inputs
• Integrated PLL with external filter
• Four output clocks at 311.04,
155.52, 77.76, and 38.88 MHz.
• Internal even/odd (mode
programmable) parity checker
with alarm output
• 23mm 208-pin BGA package
• 5V single supply
• –40 to +125
°
C case operating
temperature
1
TELECOM
PRODUCTS
TRIQUINT [ TRIQUINT SEMICONDUCTOR ]
