DS21Q50L-W+ Maxim Integrated Products, DS21Q50L-W+ Datasheet - Page 17

• Manufacturer Part Number: DS21Q50L-W+
• Description: TXRX E1 QUAD CLK/DATA 100LQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q50L-W+

• Function: Transceiver
• Interface: E1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 230mA
• Mounting Type: Surface Mount
• Package / Case: 100-LFQFP
• Includes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Operating Temperature: -
• Other names: 90-21Q50+LW0

Signal Name:
Signal Description:
Signal Type:
Used to select between Motorola and Intel parallel bus types.
Signal Name:
Signal Description:
Signal Type:
In nonmultiplexed bus operation (MUX = 0), serves as the data bus. In multiplexed bus operation
(MUX = 1), serves as an 8-bit multiplexed address/data bus.
Signal Name:
Signal Description:
Signal Type:
In nonmultiplexed bus operation, this serves as the address bus. In multiplexed bus operation, these pins are not
used and should be wired low.
Signal Name:
Signal Description:
Signal Type:
RD and DS are active-low signals. DS active HIGH when in multiplexed mode. See bus-timing diagrams.
Signal Name:
Signal Description:
Signal Type:
Must be low to read or write to the device. CS is an active low signal.
Signal Name:
Signal Description:
Signal Type:
In nonmultiplexed bus operation, this serves as the upper address bit. In multiplexed bus operation, this serves to
demultiplex the bus on a positive-going edge.
Signal Name:
Signal Description:
Signal Type:
WR is an active-low signal.
2.1.5 Serial Port Control Pins
Signal Name:
Signal Description:
Signal Type:
Data at this output can be updated on the rising or falling edge of SCLK.
Signal Name:
Signal Description:
Signal Type:
Data at this input can be sampled on the rising or falling edge of SCLK.
PBTS
Parallel Bus Type Select
Input
AD0 to AD7/SDO
Data Bus or Address/Data Bus [D0 to D6]
Data Bus or Address/Data Bus [D7]/Serial Port Output
Input/Output
A0 to A4
Address Bus
Input
RD(DS)/SCLK
Read Input—Data Strobe/Serial Port Clock
Input
CS
Chip Select
Input
ALE (AS)/A5
Address Latch Enable (Address Strobe) or A6
Input
WR (R/W)/SDI
Write Input (Read/Write)/Serial Port Data Input
Input
SDO
Serial Port Output
Output
SDI
Serial Port Data Input
Input
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