DS21Q42T+ Maxim Integrated Products, DS21Q42T+ Datasheet - Page 34
![IC FRAMER ENHANCED T1 4X 128TQFP](/photos/6/82/68247/128-lqfp_21-0086d_sml.jpg)
DS21Q42T+
Manufacturer Part Number
DS21Q42T+
Description
IC FRAMER ENHANCED T1 4X 128TQFP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS21Q42T.pdf
(116 pages)
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
Lead free / RoHS Compliant
- Current page: 34 of 116
- Download datasheet (950Kb)
Pulse Density Enforcer
The Framer always examines both the transmit and receive data streams for violations of the following
rules which are required by ANSI T1.403:
– No more than 15 consecutive zeros
– At least N ones in each and every time window of 8 x (N +1) bits where N = 1 through 23
Violations for the transmit and receive data streams are reported in the RIR2.0 and RIR2.1 bits
respectively. When the CCR3.3 is set to one, the DS21Q42 will force the transmitted stream to meet this
requirement no matter the content of the transmitted stream. When running B8ZS, the CCR3.3 bit should
be set to zero since B8ZS encoded data streams cannot violate the pulse density requirements.
CCR4: COMMON CONTROL REGISTER 4 (Address=11 Hex)
(MSB)
RSRE
SYMBOL
RFSA1
RPCSI
RSRE
RFE
RFF
RPCSI
POSITION
CCR4.7
CCR4.6
CCR4.5
CCR4.4
CCR4.3
RFSA1
NAME AND DESCRIPTION
Receive Side Signaling Re–Insertion Enable. See Section 10 for
details.
0 = do not re–insert signaling bits into the data stream presented at
the RSER pin
1 = reinsert the signaling bits into data stream presented at the
RSER pin
Receive Per–Channel Signaling Insert. See Section 10 for more
details.
0 = do not use RCHBLK to determine which channels should have
signaling re–inserted
1 = use RCHBLK to determine which channels should have
signaling re–inserted
Receive Force Signaling All Ones. See Section 10 for more
details.
0 = do not force extracted robbed–bit signaling bit positions to a one
1 = force extracted robbed–bit signaling bit positions to a one
Receive Freeze Enable. See Section 10 for details.
0 = no freezing of receive signaling data will occur
1 = allow freezing of receive signaling data at RSIG (and RSER if
CCR4.7 = 1).
Receive Force Freeze. Freezes receive side signaling at RSIG (and
RSER if CCR4.7=1); will override Receive Freeze Enable (RFE).
See Section 10 for details.
0 = do not force a freeze event
1 = force a freeze event
RFE
34 of 116
RFF
THSE
TPCSI
(LSB)
TIRFS
Related parts for DS21Q42T+
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![MAX7528KCWP](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
![MAX3261CCJ](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
![MAX3263CAG](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
![MAX8809AETL+](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
![MAX1535CETJ+T](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
![DS2741N+](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
![MAX13450EAUD+T](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
![MAX13451EAUD+T](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
![MAX17497BATE+](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
![MAX17502FATB+T](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
![MAX1978EVKIT](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
![MAX2606EUT+](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
![MAX2608EUT+](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
![MAX2831EVKIT+](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
EVALUATION KIT/2.4GHZ TO 2.5GHZ 802.11G/B RF TRANSCEIVER WITH INTEGRATED PA
Manufacturer:
Maxim Integrated Products
![MAX4888CETI+](/images/manufacturer_photos/0/4/417/maxim_integrated_products_tmb.jpg)
Part Number:
Description:
QFN/E/DUAL PCIE/SATA HIGH SPEED SWITCH WITH INTEGRATED BIAS RESISTOR
Manufacturer:
Maxim Integrated Products
Datasheet: