IDT72V8981J8 IDT, Integrated Device Technology Inc, IDT72V8981J8 Datasheet - Page 6

• Manufacturer Part Number: IDT72V8981J8
• Description: IC DGTL SW 128X128 44-PLCC
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: 72Vr
• Type: Multiplexerr

Specifications of IDT72V8981J8

• Circuit: 1 x 4:4
• Independent Circuits: 1
• Voltage Supply Source: Single Supply
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output High, Low: -
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant
• Other names: 72V8981J8

TABLE 3 — CONTROL REGISTER CONFIGURATION
TABLE 4 — CONNECTION MEMORY HIGH REGISTER
TABLE 5 — CONNECTION MEMORY LOW REGISTER
NOTE:
1. If bit 2 of the corresponding Connection HIGH location is 1 or bit 6 of the Control Register is 1, then these entire 8 bits are output on the channel and stream associated with
IDT72V8981 3.3V Time Slot Interchange
Digital Switch 128 x 128
this location. Otherwise, the bits are used as indicated to define the source of the connection which is output on the channel and stream associated with this location.
6-5
4-0
Bit
Bit
Bit
4-3
1-0
2
1
0
7
7
6
5
2
(1)
(1)
CS (Channel Source)
OE (Output Enable)
Stream Address Bits
Channel Address Bits
SM (Split Memory)
PE (Processor Mode)
MS1-MS0
(Memory Select Bits)
STA1-0
(Stream Address Bits)
Name
Name
Name
When 1, all subsequent reads are from the Data Memory and writes are to the Connection Memory LOW, except
when the Control Register is accessed again. When 0, the Memory Select bits specify the memory for the
operations. In either case, the Stream Address Bits select the subsection of the memory which is made available.
When 1, the contents of the Connection Memory LOW are output on the Serial Output streams except when the ODE
pin is LOW. When 0, the Connection Memory bits for each channel determine what is output.
unused
0-0 - Not to be used.
0-1 - Data Memory (read only from the microprocessor port)
1-0 - Connection Memory LOW
1-1 - Connection Memory is HIGH
unused
The number expressed in binary notation on these bits refers to the input or output stream which corresponds to the
subsection of memory made accessible for subsequent operations.
When 1, the contents of the corresponding location in Connection Memory LOW are output on the location's channel
and stream. When 0, the contents of the corresponding location in Connection Memory LOW act as an address for the
Data Memory and determine the source of the connection to the location's channel and stream.
unused
If the ODE pin is HIGH and bit 6 of the Control Register is 0, then this bit enables the output driver for the location's
channel and stream. This allows individuals channels on individuals streams to be made high-impedance, allowing
switching matrices to be constructed. A 1 enables the driver and a 0 disables it.
unused
The number expressed in binary notation on these 2 bits are the number of the stream for the source of the connection.
Bit 6 is the most significant bit, e.g., If bit 6 is 1, bit 5 is 0 then the source of the connection is a channel on RX2.
The number expressed in binary notation on these 5 bits is the number of the channel which is the source of the
connection (the stream where the channel lies is defined by bits 7, 6 and 5). Bit 4 is the most significant bit, e.g., if bit 4
is 1, bit 3 is 0, bit 2 is 0, bit 1 is 1 and bit 0 is 1, then the source of the connection is channel 19.
(unused)
Mode Control
No Corresponding Memory
- These bits give 0s if read
7
7
7
Bits
Stream Address
6
6
6
Bits
(unused)
5
5
5
6
Memory Select
4
4
4
Bits
Channel Address Bits
3
3
3
Description
Description
Description
(unused)
CS
2
2
2
(unused)
Stream Address
1
1
1
Bits
OE
0
0
0
Commercial Temperature Range