AK2548 Datasheet, PDF (8/30 Pages) Asahi Kasei Microsystems – 7 channel E1 Transceiver

ASAHI KASEI
[AK2548]
Pin Name I/O
Common Block
CLKSEL
I
P/S
I
RESET
I
TEST1,2,3,4 I
TAVDD1,2
TAVSS1,2
RAVDD1,2
RAVSS1,2
DVDD1,2
DVSS1,2
DAVSS1,2
IOVDD1,2
IOVSS1,2
BVDD
BVSS
PVDD
PVSS
BGREF
Function
MCLK Select Input
CLKSEL=“H”:2.048MHz
CLKSEL=“L”:34.768MHz
Parallel/Serial Port Select
P/S=“H”: Serial Port is selected
P/S=“L”: Parallel Port is selected
Reset Input
Active “Low” input pulse over 200ns initializes the internal circuit
and forces RPOSx/RNEGx output “low” and LOSx output “high”.
Factory Use. Should be connected to VSS externally.
Positive Power Supply for the analog circuitry in the transmitters
Negative Power Supply for the analog circuitry in the transmitters
Positive Power Supply for the analog circuitry in the receivers
Negative Power Supply for the analog circuitry in the receivers
Positive Power Supply for Digital
Negative Power Supply for Digital
Ground for Digital
Positive Power Supply for I/O
Negative Power Supply for I/O
Positive Power Supply for Reference Circuit
Negative Power Supply for Reference Circuit
Positive Power Supply for PLL
Negative Power Supply for PLL
Bandgap Reference Output.
12kΩ±1% exeternal register should be connected across this pin and
VSS.
Comment
C0028-E-00
8
1999/9