DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 25

• Manufacturer Part Number: DS21Q55
• Description: IC TXRX QUAD T1/E1/J1 SCT 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55

• Function: Transceiver
• Interface: E1, J1, T1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Includes: BERT Generator and Detector, Dual HDLC Controllers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

Signal Name:
Signal Description:
Signal Type:
Must be low to read or write to transceiver #1 of the device. CS1 is an active-low signal.
Signal Name:
Signal Description:
Signal Type:
Must be low to read or write to transceiver #2 of the device. CS2 is an active-low signal.
Signal Name:
Signal Description:
Signal Type:
Must be low to read or write to transceiver #3 of the device. CS3 is an active-low signal.
Signal Name:
Signal Description:
Signal Type:
Must be low to read or write to transceiver #4 of the device. CS4 is an active-low signal.
Signal Name:
Signal Description:
Signal Type:
In nonmultiplexed bus operation (MUX = 0), serves as the upper address bit. In multiplexed bus operation
(MUX = 1), serves to demultiplex the bus on a positive-going edge.
Signal Name:
Signal Description:
Signal Type:
WR is an active-low signal.
2.3 Extended System Information Bus
Signal Name:
Signal Description:
Signal Type:
Used to group two DS21Q55s into a bus-sharing mode for alarm and status reporting. See Section
details.
Signal Name:
Signal Description:
Signal Type:
Used to group two DS21Q55s into a bus-sharing mode for alarm and status reporting. See Section
details.
Signal Name:
Signal Description:
Signal Type:
Used to group two DS21Q55s into a bus-sharing mode for alarm and status reporting. See Section
details.
CS
Chip Select
Input
CS2
Chip Select for transceiver #2
Input
CS3
Chip Select for transceiver #3
Input
CS4
Chip Select for transceiver #4
Input
ALE (AS)/A7
Address Latch Enable (Address Strobe) or A7
Input
WR (R/W)
Write Input (Read/Write)
Input
ESIBS0x
Extended System Information Bus Select 0
Input/Output
ESIBS1x
Extended System Information Bus Select 1
Input/Output
ESIBRDx
Extended System Information Bus Read
Input/Output
for transceiver #1
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