DS21Q42T Maxim Integrated Products, DS21Q42T Datasheet - Page 21

• Manufacturer Part Number: DS21Q42T
• Description: IC FRAMER ENHANCED T1 4X 128TQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q42T

• Controller Type: T1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DS21Q42
Signal Name: JTMS
Signal Description: IEEE 1149.1 Test Mode Select
Signal Type: Input
This pin is sampled on the rising edge of JTCLK and is used to place the test port into the various defined
IEEE 1149.1 states. This pin is pulled up internally by a 10-kilo ohm resistor. If not used, this pin should
be left unconnected. This function is available when FMS = 0.
Signal Name: JTCLK
Signal Description: IEEE 1149.1 Test Clock Signal
Signal Type: Input
This signal is used to shift data into JTDI pin on the rising edge and out of JTDO pin on the falling edge.
If not used, this pin should be connected to VSS. This function is available when FMS = 0.
Signal Name: JTDI
Signal Description: IEEE 1149.1 Test Data Input
Signal Type: Input
Test instructions and data are clocked into this pin on the rising edge of JTCLK. This pin is pulled up
internally by a 10-kilo ohm resistor. If not used, this pin should be left unconnected. This function is
available when FMS = 0.
Signal Name: JTDO
Signal Description: IEEE 1149.1 Test Data Output
Signal Type: Output
Test instructions and data are clocked out of this pin on the falling edge of JTCLK. If not used, this pin
should be left unconnected. This function is available when FMS = 0.
SUPPLY PINS
Signal Name: VDD
Signal Description: Positive Supply
Signal Type: Supply
2.97 to 3.63 volts.
Signal Name: VSS
Signal Description: Signal Ground
Signal Type: Supply
0.0 volts.
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