78P2351R
Serial 155M
NRZ to CMI Converter
ELECTRICAL SPECIFICATIONS (continued)
DIGITAL I/O CHARACTERISTICS: (continued)
Pins of type PO:
PARAMETER
Signal Swing
SYMBOL
Vpk
CONDITIONS
MIN
0.5
NOM
0.8
MAX
1.1
UNIT
V
Common Mode Level
Effective Source Impedance
Rise Time
Vcm
Reff
Tr
Vdd referenced
-1.55
-1.2
20
0.8
-1.1
V
Ω
10-90%
10-90%
1.2
1.2
ns
ns
Fall Time
Tf
0.8
Pins of type PI:
PARAMETER
Signal Swing
SYMBOL
CONDITIONS
MIN
0.3
NOM
MAX
UNIT
V
Vpki
Common Mode Level
Vcm
Vdd referenced
-1.6
-1.2
-0.8
V
Pins of type OD
PARAMETER
Output Voltage Low
SYMBOL
CONDITIONS
Iol = 8mA
MIN
NOM
MAX
0.4
UNIT
V
Vol
Pull-down Leakage Current
Pull-up Resistor
Ipd
Rpu
Logic high output
1
10
nA
kΩ
4.7
REFERENCE CLOCK CHARACTERISTICS:
PARAMETER
SYMBOL CONDITIONS
MIN
NOM
MAX
UNIT
CKREF Duty Cycle
--
40
60
%
Synchronous mode
--
-20
+20
CKREF Frequency Stability
ppm
Plesiochronous or Loop-timing
-75
+75
mode. (see Note 1)
Note 1: In Plesiochronous mode, the transmit data source (i.e. framer) must still be of +/-20ppm quality in
order to meet SONET/SDH bit rate requirements.
Page: 19 of 31
2006 Teridian Semiconductor Corporation
Rev. 2.1
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
