ISL37231 Datasheet, PDF (4/9 Pages) Intersil Corporation – 10.3125 Gb/s Retiming Dual-Channel Transceiver

ISL37231
Pin Functions and Definitions (Continued)
PIN NAME
PIN NUMBER
DIRECTION
DESCRIPTION
AIN2[P,N]
A32, A33
Input
High-speed differential input for on-ramp (PCB to cable) Channel 2, CML. The use of series
220nF, low ESL/ESR, MLCC capacitors with at least 8GHz frequency response is recommended.
AOUT2[N,P]
A35, A36
Output High-speed differential output for on-ramp (PCB to cable) Channel 2, CML. (Note 4)
AOUT1[P,N]
A39, A40
Output High-speed differential output for on-ramp (PCB to cable) Channel 1, CML. (Note 4)
AVDD1
B2, R1, R2, R3, R4
(Note 5)
1.0V analog supply voltage. The use of parallel 100pF and 10nF decoupling capacitors to ground
is recommended for each of these pins/rails for broad high-frequency noise suppression.
AVDD18
B3
1.8V analog supply voltage. The use of parallel 100pF and 10nF decoupling capacitors to ground
is recommended for this pin for broad high-frequency noise suppression.
NC
B4, B6, B7, B13, B14,
B19, B20, B26, B27
No connection. Do not connect to these pins.
DVDD
B5, B15
1.0V digital supply voltage. The use of parallel 100pF and 10nF decoupling capacitors to ground
is recommended for these pins for broad high-frequency noise suppression.
VDDPLLB1
B8
1.8V analog supply voltage for off-ramp Channel 1.
REFRETB1
B9
VDDPLL reference return path for off-ramp Channel 1.
REXT2
B10
External reference resistor connection. Recommended value of 1.18kΩ.
REFRETB2
B11
VDDPLL reference return path for off-ramp Channel 2.
VDDPLLB2
B12
1.8V analog supply voltage for off-ramp Channel 2.
AURX2
B16
Input Auxiliary UART input 2. CMOS logic, 1.8V (tolerant to 3.3V).
VDDPST
B17
1.8V digital supply voltage. The use of parallel 100pF and 10nF decoupling capacitors to ground
is recommended for each of these pins for broad high-frequency noise suppression.
RESET
B18
Input CMOS logic input. 1.8V powered. Resets all internal registers and memory when pulled low.
VDDPLLA2
B21
1.8V analog supply voltage for on-ramp Channel 2.
REFRETA2
B22
VDDPLL reference return path for on-ramp Channel 2.
REXT1
B23
External reference resistor connection. Recommended value of 1.18kΩ.
REFRETA1
B24
VDDPLL reference return path for on-ramp Channel 1.
VDDPLLA1
B25
1.8V analog supply voltage for on-ramp Channel 1.
NOTES:
4. Series coupling capacitors are required at one end of the cable. For best results, place the capacitors at the receiver end of the cable. The use of
220nF low ESL/ESR MLCC capacitors with at least 8GHz frequency response is recommended.
5. Each power bar is independent, so they must all connect to the same 1V supply for proper circuit operation.
4
FN8266.1
January 25, 2013