ak2548 AKM Semiconductor, Inc., ak2548 Datasheet - Page 8

• Manufacturer Part Number: ak2548
• Description: 7 Channel E1 Transceiver - Asahi Kasei Microsystems
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
TEST1,2,3,4
C0028-E-00
Common Block
CLKSEL
P/S
RESET
TAVDD1,2
TAVSS1,2
RAVDD1,2
RAVSS1,2
DVDD1,2
DVSS1,2
DAVSS1,2
IOVDD1,2
IOVSS1,2
BVDD
BVSS
PVDD
PVSS
BGREF
Pin Name
I/O
I
I
I
I
MCLK Select Input
Parallel/Serial Port Select
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.
12k ± 1% exeternal register should be connected across this pin and
VSS.
CLKSEL=“H”:2.048MHz
CLKSEL=“L”:34.768MHz
P/S=“H”: Serial Port is selected
P/S=“L”: Parallel Port is selected
Function
8
Comment
[AK2548]
1999/9