ICS854S204I Datasheet, PDF (2/19 Pages) Integrated Device Technology – LOW SKEW, DUAL, PROGRAMMABLE 1-TO-2 DIFFERENTIALTO-LVDS, LVPECL FANOUT BUFFER

ICS854S204I
LOW SKEW, DUAL, 1-TO-2 DIFFERENTIAL-TO-LVDS, LVPECL FANOUT BUFFER
TABLE 1. PIN DESCRIPTIONS
Number Name
Type
Description
1
PCLKA
Input Pulldown Non-inverting differential clock input.
2
nPCLKA Input Pullup Inverting differential clock input.
3, 4 QA0, nQA0 Output
Differential output pair. LVDS or LVPECL interface levels.
5, 6 QA1, nQA1 Output
Differential output pair. LVDS or LVPECL interface levels.
7
V
Power
TAP
Power supply pin. Tie to V_DD for 2.5V operation.
For 3.3V operation, do not connect.
8
GND
Power
Power supply ground.
9
SEL_OUT Input Pulldown Selects between LVDS or LVPECL outputs.
10
11, 12
V_DD
Power
nQB1, QB1 Output
Power supply pin.
Differential output pair. LVDS or LVPECL interface levels.
13, 14 nQB0, QB0 Output
Differential output pair. LVDS or LVPECL interface levels.
15
PCLKB Input Pulldown Non-inverting differential clock input.
16
nPCLKB Input Pullup Inverting differential clock input.
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
C_IN
R_PULLUP
R_PULLDOWN
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Test Conditions
Minimum
Typical
1
51
51
Maximum
Units
pF
kΩ
kΩ
TABLE 3. CLOCK INPUT FUNCTION TABLE
Inputs
PCLKA or
PCLKB
nPCLKA or
nPCLKB
Outputs
QA0, QA1,
QB0, QB1
nQA0, nQA1,
nQB0, nQB1
Input to Output Mode
Polarity
0
1
LOW
HIGH
Differential to Differential Non Inverting
1
0
HIGH
LOW
Differential to Differential Non Inverting
0
Biased; NOTE 1
LOW
HIGH
Single Ended to Differential Non Inverting
1
Biased; NOTE 1
HIGH
LOW
Single Ended to Differential Non Inverting
Biased; NOTE 1
0
HIGH
LOW
Single Ended to Differential
Inverting
Biased; NOTE 1
1
LOW
HIGH
Single Ended to Differential
Inverting
NOTE 1: Please refer to the Application Information, "Wiring the Differential Input to Accept Single Ended Levels".
IDT^™ / ICS^™ LVDS, LVPECL FANOUT BUFFER
2
ICS854S204BGI REV. A JUNE 4, 2008