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XR-T5793
...the analog plus company TM
Quad E1 Line Interface Unit
June 1997-3
FEATURES D Meets CCITT G.703 Pulse Mask Template for 2.048Mbps (E1) Rates D Transmitter and Receiver Interfaces Can Be: - Single Ended, 75 Capacitive or Transformer Coupled - Balanced, 100 or 120 Transformer Coupled D Minimum Return Loss is 20dB (Receive) and 18dB (Transmit), Exceeds G.703 and ETSI 300 166 Specifications D Bipolar Outputs Can Be Disabled Individually (High Z Outputs) D System Interface is TTL Compatible on Digital Input and TTL/CMOS Compatible on Digital Output Pins GENERAL DESCRIPTION The XR-T5793 is an optimized line interface unit, built using low power CMOS technology. This device contains four independent E1 channels for primary rate, PCM applications up to 2.048Mbps. Each channel performs the driver and receiver functions necessary to convert bipolar signals to TTL/CMOS compatible logic levels and vice versa. The device supports single ended or balanced line interfaces on each channel, thereby providing the user an option of reducing system cost and board space by replacing the transformer with a capacitor. Each of the four drivers can be independently disabled, allowing maximum flexibility in system power management. Output pulses are fully CCITT G.703 compliant. Moreover, the return loss is at least 18dB over a frequency range of 51kHz to 3.072MHz. The slicing circuit in the receive path is able to tolerate a maximum of 12dB of cable loss with a minimum input
D Individual Channel Loss of Signal Detection, Local and Remote Digital Loopback D Low Power, CMOS Technology D Over-Temperature Protection APPLICATIONS D Multi-Line E1 Interface Cards D E1 Network Equipment - Multiplexers - Cross Connects - Switching Systems D Fault Tolerant Systems
sensitivity of 600mV over the operating temperature range. Return loss on the receive interfaces is minimum 20dB from 51kHz to 3.072MHz. Local and remote loopbacks can be performed on any of the four channels. A separate loss of signal (LOS) detection circuitry and a LOS pin is provided for each input. The XR-T5793 is targeted for multi-line E1 line card applications where real estate and low power consumption are critical. Also, the device may be used in T1 applications (1.544Mbps) which do not require meeting the DSX-1 cross connect pulse template. The XR-T5793 is pin compatible with the XR-T5794, which supports a fifth channel. The fifth channel is for redundancy and dedicated monitoring on any of the eight bipolar paths.
ORDERING INFORMATION
Part No. XR-T5793IJ XR-T5793IV Package 68 Lead PLCC 80 Lead TQFP (14 x 14 x 1.4 mm) Operating Temperature Range -40C to +85C -40C to +85C
Rev. 2.00
E1995
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017 1
XR-T5793
BLOCK DIAGRAM
Transceiver 1 Transceiver 2 75 Unbalanced (Without Transformer) TIP 0.1F Impedance Selectable Receivers. Return Loss Exceeds G7.03. TIP 120 Balanced (or 100 ) RX INPUT RING Impedance Selectable Tristate Drivers Return Loss Exceeds ETSI 300 166 PE-65834 TTI-7148 LOS Threshold Based on G.775 LOOPSEL (1.0) LOOPEN LPMOD 75 Level Detector RXIN 100 or 120 E1/T1Peak Detector Slicer L o c a l / R e m o t e L o o p b a c k Transceiver 3 Transceiver 4 LOS RXPOS RXNEG
Slice Voltage
TXOUT TIP 120,100 or 75 Balanced TX OUTPUT RING PE-65839 TTI-7149 75 Unbalanced TIP (Without Transformer) 0.1F Rout1 TXEN
Driver
TXPOS TXNEG TCLK
ROUT1
Note 1R OUT = 68 for 120 line impedance, ROUT = 62 for 100 line impedance, ROUT = 68 for 75 line impedance
Figure 1. Block Diagram
Rev. 2.00 2
XR-T5793
PIN CONFIGURATION
TXEN3 TXEN4 TXOUT4 TVDD TV TXOUT3 AGND TV DD NC TV AGND TXOUT2 TV TVDD TXOUT1 TXEN1 TXEN2
SS SS SS
9 NC AVDD TXCLK4 TXPOS4 TXNEG4 TXCLK3 TXPOS3 TXNEG3 LOOPEN4 LOOPEN3 GND VDD RXPOS3 RXNEG3 RXPOS4 RXNEG4 RVDD 10
1
61 60 LOSLVS AVSS TXCLK2 TXPOS2 TXNEG2 TXCLK1 TXPOS1 TXNEG1 LOOPEN2 LOOPEN1 E1/T1- VSS RXPOS2 RXNEG2 RXPOS1 RXNEG1 RVSS
26 27
44 43
60 NC NC TXEN2 TXEN1 TXOUT1 TVDD TVSS TXOUT2 AGND TVSS NC TVDD AGND TXOUT3 TVSS TVDD TXOUT4 TXEN4 TXEN3 NC 61
LOSLVS AVSS AVSS AVSS TXCLK2 TXPOS2 TXNEG2 TXCLK1 TXPOS1 TXNEG1 LOOPEN2 LOOPEN1 E1/T1VSS RXPOS2 RXNEG2 RXPOS1 RXNEG1 RVSS RVSS 41 40 NC NC LPMOD1 LPMOD2 RXIN1 LOS2 LOS1 RXIN2 NC RGND RGND RGND NC NC RXIN3 LOS3 LOS4 RXIN4 LPMOD3 LPMOD4 80 1 20 21
Rev. 2.00 3
NC NC AVDD AVDD TXCLK4 TXPOS4 TXNEG4 TXCLK3 TXPOS3 TXNEG3 LOOPEN4 LOOPEN3 GND V DD RXPOS3 RXNEG3 RXPOS4 RXNEG4 RVDD RV DD
LPMOD4 LPMOD3 RXIN4 LOS4 LOS3 RXIN3 NC NC RGND RGND NC RXIN2 LOS1 LOS2 RXIN1 LPMOD2 LPMOD1
68 Lead PLCC
80 Lead TQFP (14 x 14 x 1.4 mm)
XR-T5793
PIN DESCRIPTION
PLCC Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 SQFP Pin # 71 72 73 74 75 76 77 78 79 1, 2, 80 3,4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19,20
Symbol NC TVDD AGND TXOUT3 TVSS TVDD TXOUT4 TXEN4 TXEN3 NC AVDD TXCLK4 TXPOS4 TXNEG4 TXCLK3 TXPOS3 TXNEG3 LOOPEN4 LOOPEN3 GND VDD RXPOS3 RXNEG3 RXPOS4 RXNEG4 RVDD
Type
Description No Connect. Transmit VDD. )5V ($5%). Analog Ground. Transmitter 3 Output. Transmitter 3 bipolar output connected to coupling capacitor or pulse transformer by a resistor. Transmit VSS. -5V ($5%). Transmit VDD. +5V ($5%). Transmitter 4 Output. Transmitter 4 bipolar output connected to coupling capacitor or pulse transformer by a resistor. Transmitter 4 Output Enable. If driven high the transmitter 4 output drivers are enabled. Hi-Z otherwise. Transmitter 3 Output Enable. If driven high the transmitter 3 output drivers are enabled. Hi-Z otherwise. No Connect. Analog VDD. Transmitter 4 Clock Input. Apply logic one when RZ signals are supplied to data inputs. Transmitter 4 Positive Data In. Positive data input in NRZ or RZ format for transmitter 4. Transmitter 4 Negative Data In. Negative data input in NRZ or RZ format for transmitter 4. Transmitter 3 Clock Input. Apply logic one when RZ signals are supplied to data inputs. Transmitter 3 Positive Data in. Positive data input in NRZ or RZ format for transmitter 3. Transmitter 3 Negative Data In. Negative data input in NRZ or RZ format for transmitter 3. Loop Enable 4. If driven high the specified loop type will be enabled for channel 4. Otherwise normal operation will continue. Loop Enable 3. If driven high the specified loop type will be enabled for channel 3. Otherwise normal operation will continue. Digital Ground. Digital VDD. +5V ($5%). Receiver 3 Positive Data Out. Positive data output in NRZ or RZ format for receiver 3. Receiver 3 Positive Data Out. Negative data output in NRZ or RZ format for receiver 3. Receiver 4 Positive Data Out. Positive data output in NRZ or RZ format for receiver 4. Receiver 4 Positive Data Out. Negative data output in NRZ or RZ format for receiver 4. Receive VDD. +5V ($5%).
VDD GND O VSS VDD O I I NC VDD I I I I I I I I GND VDD O O O O VDD
Rev. 2.00 4
XR-T5793
PIN DESCRIPTION (CONT'D)
PLCC Pin # 27 SQFP Pin # 21
Symbol LPMOD4
Type I
Description Loop Mode 4. If driven high the loopback mode of channel 4 will be set to remote loop. Otherwise theloopback mode will remain at local loop. The actualloopback will be activated when the LOOPEN4 is asserted. Loop Mode 3. If driven high the loopback mode of channel 3 will be set to remote loop. Otherwise the loopback mode will remain at local loop. The actual loopback will be activated when the LOOPEN3 is asserted. Receiver 4 Input. Receiver 4 bipolar input connected to coupling capacitor or pulse transformer. Receiver 4 Loss of Signal. Asserted during LOS condition. Clear otherwise. Receiver 3 Loss of Signal. Asserted during LOS condition. Clear otherwise. Receiver 3 Input. Receiver 3 bipolar input connected to coupling capacitor or pulse transformer. No Connect. No Connect.
28
22
LPMOD3
I
29 30 31 32 33 34 35 36 37 38 39 40 41 42
23 24 25 26 27 28 29, 30 31 32 33 34 35 36 37
RXIN4 LOS4 LOS3 RXIN3 NC NC RGND RGND NC RXIN2 LOS1 LOS2 RXIN1 LPMOD2
I O O I
GND GND
Receive Ground. Receive Ground. No Connect.
I O O I I
Receiver 2 Input. Receiver 2 bipolar input connected to coupling capacitor or pulse transformer. Receiver 1 Loss of Signal. Asserted during LOS condition. Clear otherwise. Receiver 2 Loss of Signal. Asserted during LOS condition. Clear otherwise. Receiver 1 Input. Receiver 1 bipolar input connected to coupling capacitor or pulse transformer. Loop Mode 2. If driven high the loopback mode of channel 2 will be set to remote loop. Otherwise the loopback mode will remain at local loop. The actual loopback will be activated when the LOOPEN2 is asserted. Loop Mode 1. If driven high the loopback mode of channel 1 will be set to remote loop. Otherwise the loopback mode will remain at local loop. The actual loopback will be activated when the LOOPEN1 is asserted. No Connect. Receive VSS. -5V ($5%). Receiver 1 Negative Data Out. Negative data output in NRZ or RZ format for receiver 1. Receiver 1 Positive Data Out. Positive data output in NRZ or RZ format for receiver 1. Receiver 2 Negative Data Out. Negative data output in NRZ or RZ format for receiver 2. Receiver 2 Positive Data Out. Positive data output in NRZ or RZ format for receiver 2. Digital VSS. -5V ($5%). E1/T1- Selection. Apply logic one to select the receive data threshold appropriate for E1 operation. Connect to ground to select the T1 data threshold.
43
38
LPMOD1
I
44 45 46 47 48 49 50
39, 40 41,42 43 44 45 46 47 48
NC RVSS RXNEG1 RXPOS1 RXNEG2 RXPOS2 VSS E1/T1-
NC VSS O O O O VSS I
Rev. 2.00 5
XR-T5793
PIN DESCRIPTION (CONT'D)
PLCC Pin # 51 52 53 54 55 56 57 58 59 60 SQFP Pin # 49 50 51 52 53 54 55 56 57,58,59 60 Symbol LOOPEN1 LOOPEN2 TXNEG1 TXPOS1 TXCLK1 TXNEG2 TXPOS2 TXCLK2 AVSS LOSLVS Type I I I I I I I I VSS I Description Loop Enable 1. If driven high the specified loopback mode will be enabled for channel 1. Otherwise normal operation will continue. Loop Enable 2. If driven high the specified loopback mode will be enabled for channel 2. Otherwise normal operation will continue. Transmitter 1 Negative Data In. Negative data input in NRZ or RZ format for transmitter 1. Transmitter 1 Positive Data In. Positive data input in NRZ or RZ format for transmitter 1. Transmitter 1 Clock Input. Apply logic one when RZ signals are supplied to data inputs. Transmitter 2 Negative Data In. Negative data input in NRZ or RZ format for transmitter 2. Transmitter 2 Positive Data In. Positive data input in NRZ or RZ format for transmitter 2. Transmitter 2 Clock Input. Apply logic one when RZ signals are supplied to data inputs. Analog VSS. Loss of Signal Voltage Select. Apply logic one to select LOS voltage level appropriate for 120 balanced receiver operation. Connect to ground to choose LOS voltage for 75 unbalanced operation. No Charge. Transmitter 2 Output Enable. If asserted the transmitter 2 output drivers are enabled. High-Z otherwise. Transmitter 1 Output Enable. If asserted the transmitter 1 output drivers are enabled. High-Z otherwise. Transmitter 1 Output. Transmitter 1 bipolar output connected to coupling capacitor or pulse transformer through a resistor. Transmit VDD. +5V ($5%). Transmit VSS. -5V ($5%). Transmitter 2 Output. Transmitter 2 bipolar output connected to coupling capacitor or pulse transformer through a resistor. Analog Ground. Transmit VSS. -5V ($5%).
61 62 63 64 65 66 67 68
61, 62 63 64 65 66 67 68 69 70
NC TXEN2 TXEN1 TXOUT1 TVDD TVSS TXOUT2 AGND TVSS
NC I I O VDD VSS O GND VSS
Rev. 2.00 6
XR-T5793
DC ELECTRICAL CHARACTERISTICS
Test Conditions: TA = -40C to 25C to 85C, all VDDs = 5V $5%, all VSSs = -5V $5%, all GNDs = 0V
Symbol Parameter Min. Typ. Max. Unit Conditions
DC Parameters VDDs VSSs Inputs VIH VIL IPDC Outputs VOH VOH VOL RXP RXCL RXIWT RXTI RXEI RXLOS RIN PD PD PC PC PC PVDD Pvss High Level Output High Level Output Low Level Output 3.5 2.4 0.4 V V V IOH = -10A IOH = -40A IOL = 1.6mA High Level Input Low Level Input Input Pull Down Current 2.0 0.8 40 V V A DC Supply Positive DC Supply Negative 4.75 -4.75 5.00 -5.00 5.25 -5.25 V V
Receiver Specifications Receiver Sensitivity Allowed Cable Loss (0dB=2.4V) Interference Margin (E1) Receiver Slicing Level Receiver Slicing Level (T1)1 (E1)1 0.6 0 0 16 60 45 65 50 0.2 2.5 400 250 752 1002 1202 500 475 450 680 280 833 860 830 Pc/2 +5mW Pc/2 - 5mW 70 55 0.3 10 10 4.2 12 12 Vp dB dB dB % % V k mW mW mW mW mW mW mW All Drivers in High-Z All 1's Transmit & Receive All 1's Transmit & Receive All 1's Transmit & Receive Up to 3.072MHz 1.024MHz (E1) 772kHz (T1) with 6dB cable loss Peak Voltage % Peak Voltage %
Receiver LOS Threshold Input Resistance Power Dissipation Power Dissipation Power Consumption Power Consumption Power Consumption
Power Specifications (Without Monitor Channel)
Power Supply Requirement Power Supply Requirement
Notes 1 Selected by E1/T12 Power consumption = power dissipation + power to the cable. Bold face parameters are covered by production test and guaranteed over operating temperature range.
Specifications are subject to change without notice
Rev. 2.00 7
XR-T5793
AC ELECTRICAL CHARACTERISTICS
Test Conditions: TA = -40C to 25C to 85C, all VDDs = 5V $5%, all VSSs = -5V $ 5%, all GNDs = 0V
Symbol Parameter Min. Typ. Max. Unit Conditions
AC PARAMETERS VTXOUT VTXOUT VTXOUT TXPW TXPW T1 T2 T3 T4 T5 TR TF T6 T7 T8 Output Pulse Amplitude (75) Output Pulse Amplitude (120) Output Pulse Amplitude (100) Pulse Width (2.048MHz) Pulse Width (1.544MHz) Pos/neg Pulse Imbalance TXCLK Clock Period (E1) TXCLK Clock Period (T1) TXCLK Duty Cycle Data Setup Time, TDATA to TCLK Data Hold Time, TCLK to TDATA Clock Rise Time Clock Fall Time Receive Data High (E1) Data Propagation Delay Data Propagation Delay 219 244 T1 T2 48 50 50 30 30 269 ) 100 2.13 2.70 2.3 224 274 -5 488 648 50 52 2.37 3.0 3.0 244 324 2.60 3.30 3.7 264 374 +5 V V V ns ns % ns ns % ns ns ns ns ns ns ns 0dB Cable Loss Determined by TX Clock Determined by TX Clock
T 1 ) 100 T2
Specifications are subject to change without notice
ABSOLUTE MAXIMUM RATINGS Storage Temperature . . . . . . . . . . . . -65C to +150C Operating Temperature . . . . . . . . . . . . -40C to +85C Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $7V
Rev. 2.00 8
XR-T5793
T1 or TF T3 T3
TXCLK(n) T4 T5
TR
TF
TXPOS(n)
TXNEG(n)
Figure 2. Transmit Timing Diagram
T7 T6 RXIN TR TF
RXPOS RXNEG
T8 TF TR
T6
Figure 3. Receive Timing Diagram
Rev. 2.00 9
XR-T5793
Transmit Interface Min. 51kHz to 102kHz 102kHz to 2.048MHz 2.048MHz to 3.072MHz Receive Interface Min. 51kHz to 102kHz 102kHz to 2.048MHz 2.048MHz to 3.072MHz 20 20 20 18 18 18 75 Typ. 30 30 30 Min. 20 20 20 75 Typ. 22 22 22 Min. 18 18 18 100 Typ. 30 30 30 Min. 20 20 20 100 Typ. 22 22 22 Min. 18 18 18 120 Typ. 30 30 30 Units dB dB dB 120 Typ. 22 22 22 Units dB dB dB
Note The return loss has been measured on the evaluation board coupled via a capacitor and terminated with 75 impedance.
Table 1. Return Loss Requirements (Resistor Tolerance: 1% on Transmit Side, 2% on Receive Side)
Turns Ratio 1:1 1:1 1:1
Line Impedance 75 120 100
RLOAD 75 120 100
Turns Ratio 1:1 1:1.265 1:1.265
Line Impedance 75 120 100
ROUT 68 68 62
Table 2. Input Transformer Requirements
Table 3. Output Transformer Requirements
Magnetic Supplier Information: Pulse Telecom Product Group P.O. Box 12235 San Diego, CA 92112 Tel. (619) 674-8100 Fax. (619) 674-8262 Transpower Technologies, Inc. 24 Highway 28, Suite 202 Crystal Bay, NV 89402-0187 Tel. (702) 831-0140 Fax. (702) 831-3521
Rev. 2.00 10
XR-T5793
SYSTEM DESCRIPTION This device is a quad E1 transceiver which provides electrical interface for 2.048Mbps applications. Its unique architecture includes four receiver circuits that convert CCITT G.703 compliant bipolar signals to TTL compatible logic levels. Likewise, in the other direction, four transmitters translate TTL compatible logic levels to G.703 compatible bipolar signals. This device supports two different types of loopback functions. Each of four channels can be independently looped either in local or remote sides digitally. The remote loopback is performed between the receiver input and transmitter output. To activate the remote loopback on channel n, LOOPENn and LPMODn inputs are driven high. Local loopback on channel n, can be established similarly by driving LOOPENn high and clearing LPMODn inputs. More than one channel can be tested simultaneously. driver. External resistors are used to maintain an accurate source impedance that has a high return loss to the transformer or the capacitor. Each of the drivers can be individually disabled, this is required in fault tolerant applications where redundancy is a requirement. During power-down mode of operation the bipolar outputs can be disabled. To protect the data integrity during a brownout, the output pulse amplitudes are reduced by a factor of 25% if the supply drops below an internally set limit. Transmission is possible either with or without a clock. If a clock is used, the transmit input data must consist of full-width NRZ pulses, and the transmitter output pulse width is determined by the duty cycle of the clock. If the transmit clock is tied high, the transmitter output pulses are determined by the input data pulse width. In this mode, RZ data must be supplied to the device.
RECEIVERS
TXP TXN
Each of the four identical E1 line receivers will accept bipolar signals meeting the CCITT G.703 pulse mask requirements. Each input stage consists of a slicing circuitry which samples the incoming pulses at a fixed percentage of the signals maximum amplitude. The slicing voltage level is generated using a precision peak detector. The receiver section can tolerate up to 12dB of line loss (measured at 1.024MHz). A loss of signal (LOS) is detected on any inputs by input fail circuitry. There is an independent LOS pin dedicated for each of the receivers. The LOS detection is based on signal energy instead of number of zeros. A balanced signal (100 or 120) must be coupled by a transformer. An unbalanced signal (75) may be coupled via capacitor or a transformer.
RXIN
RX
TX LPMOD=0 LPEN=1 RXP RXN
TXOUT
Remote Loopback
TXP TXN
RXIN
RX
TX LPMOD=0 LPEN=1 RXP RXN
TXOUT
Local Loopback
TRANSMITTERS This device contains four identical CCITT G.703 compliant transmitters which meet the return loss requirements. Each transmitter is a single-ended voltage
Figure 4. Loopback Configurations
Rev. 2.00 11
XR-T5793
Output Transformer Selection The 1:1.265 ratio output transformer is recommended for the XR-T5793 because this ratio gives the best possible transmitter output return loss for 120 balanced E1 service. However, other transformers may provide an adequate return loss for many applications. The two characteristics that determine series build-out resistor requirements are: D Driver output impedance is less than 5. D Vs, which is the driver open circuit output voltage, is 4.5V peak. The following method may be used to determine transformer suitability for a given use. 1. List the application requirements. Transformer ratio = 1:n VO = Peak output pulse amplitude RL = Load resistance
Rs 1:n 3 Vs 4 2 1 VO RL
3.
Calculate the source resistance, Rs.
R S + Req VS *1 V eq
4.
Now calculate the theoretical return loss.
Return Loss + 20 log Req ) R S Req * R S
The calculation given below uses the recommended 1:1.265 ratio transformer as an example: Transformer Ratio = 1:1.265 VO = 3.0V Peak RL = 120
Req + RL + 120 + 75 1.6 n2
V Veq + no + 3.0 + 2.37V 1.265 VS * 1 + 75 4.5 * 1 2.37 Veq
Rs + Req
+ 67.4
Figure 5. Equivalent Impedance Schematic 2. Calculate equivalent output voltage and load resistance without the transformer.
R eq RL +2 n V eq V + nO
(Datasheet specifies standard value of 68) Calculate the theoretical return loss to determine if the transformer is acceptable.
Return Loss + 20 log 75 ) 67.4 + 25.5dB 75 * 67.4
Rs
Vs
Req
Veq
Figure 6. Equivalent Simplified Schematic
Rev. 2.00 12
XR-T5793
269 ns (244 + 25) 20% 10% V = 100% 10% 20% 194 ns (244 - 50) Nominal pulse
50% 244 ns 219 ns (244 - 25)
10% 0% 10% 20%
10% 10%
488 ns (244 + 244)
Note: V corresponds to the nominal peak value
Figure 7. CCITT G.703 Pulse Template
Rev. 2.00 13
XR-T5793
68 LEAD PLASTIC LEADED CHIP CARRIER (PLCC)
Rev. 1.00
D D1 45 x H2 2 1 68 B1 45 x H1 C Seating Plane A2
B D D1 D3 D2
e
R D3 A1 A INCHES SYMBOL A A1 A2 B B1 C D D1 D2 D3 e H1 H2 R MIN 0.165 0.090 0.020 0.013 0.026 0.008 0.985 0.950 0.890 MAX 0.200 0.130 ---. 0.021 0.032 0.013 0.995 0.958 0.930 MILLIMETERS MIN 4.19 2.29 0.51 0.33 0.66 0.19 25.02 24.13 22.61 MAX 5.08 3.30 --0.53 0.81 0.32 25.27 24.33 23.62
0.800 typ. 0.050 BSC 0.042 0.042 0.025 0.056 0.048 0.045
20.32 typ. 1.27 BSC 1.07 1.07 0.64 1.42 1.22 1.14
Note: The control dimension is the inch column
Rev. 2.00 14
XR-T5793
80 LEAD THIN QUAD FLAT PACK (14 x 14 x 1.4 mm, TQFP)
Rev. 3.00
D D1 60 41
61
40
D1
D
80
21
1 A2 e A Seating Plane A1 B
20
C
L
INCHES SYMBOL A A1 A2 B C D D1 e L MIN MAX
MILLIMETERS MIN 1.40 0.05 1.35 0.22 0.09 15.80 13.90 MAX
0.055 0.063 0.002 0.006 0.053 0.057 0.009 0.015 0.004 0.008 0.622 0.638 0.547 0.555 0.0256 BSC 0.018 0.030 0 7
1.60 0.15 1.45 0.38 0.20 16.20 14.10 0.65 BSC 0.45 0.75 0 7
Note: The control dimension is the millimeter column
Rev. 2.00 15
XR-T5793
NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 1995 EXAR Corporation Datasheet June 1997 Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
Rev. 2.00 16

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