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Part: HS1-246RH-Q
Category:
Others
-> Space Applications
Description: Radiation Hardened Triple Line Transmitter, Triple Line Receiver, Triple Party-line Receiver
Company: Intersil Corporation
Datasheet: Download HS1-246RH-Q datasheet File size : 127 kB
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Datasheet text preview:
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HS-245RH, HS-246RH, HS-248RH
D a ta Sheet A p r i l 2003 FN3034.4
HS-245RH Radiation Hardened Triple Line Transmitter HS-246RH Radiation Hardened Triple Line Receiver HS-248RH Radiation Hardened Triple Party-Line Receiver
The HS-245RH/246RH/248RH radiation hardened triple line transmitter and triple line receivers are fabricated using the Intersil dielectric isolation process. These parts are identical in pinout and function to the original HD-245/246/248. They are also die size and bond pad placement compatible with the original parts for those customers who buy dice for hybrid assembly. Each transmitter-receiver combination provides a digital interface between systems linked by 100 twisted pair, shielded cable. Each device contains three circuits fabricated within a single monolithic chip. Data rates greater than 15MHz are possible depending on transmission line loss characteristics and length. The transmitter employs constant current switching which provides high noise immunity along with high speeds, low power dissipation, low EMI generation and the ability to drive high capacitance loads. In addition, the transmitters can be turned "off" allowing several transmitters to timeshare a single line. Receiver input/output differences are shown in the table:
PART NO. HS-246RH HS-248RH IN P U T 100 Hi-Z OUTPUT Open Collector 6K Pull-Up Resistors
Features
· Electrically Screened to SMD # 5962-96722 and 5962-96723 · QML Qualified per MIL-PRF-38535 Requirements · Radiation Hardened DI Processing - Total Dose . . . . . . . . . . . . . . . . . . . . 200 krad(Si) (Max) - Latchup Free - Neutron Fluence . . . . . . . . . . . . . . . . . .5 x 1012 N/cm2 · Replaces HD-245/246/248 · Current Mode Operation · High Speed with 50 Foot Cable . . . . . . . . . . . . . . . 15MHz High Speed with 1000 Foot Cable . . . . . . . . . . . . . . 2MHz · High Noise Immunity · Low EMI Generation · Low Power Dissipation · High Common Mode Rejection · Transmitter and Receiver Party Line Capability · Tolerates -2.0V to +20.0V Ground Differential (Transmitter with Respect to Receiver) · Transmitter Input/Receiver Output TTL/DTL Compatible
Ordering Information
ORDERING NUMBER 596 2R9672201 QCC 596 2R9672201 QXC INTERNAL MKT. NUMBER HS1-245RH-8 HS9-245RH-8 HS1-245RH-Q HS9-245RH-Q HS9-245RH/PROTO HS1-246RH-8 HS9-246RH-8 HS1-246RH-Q HS9-246RH-Q HS1-248RH-8 HS9-248RH-8 HS1-248RH-Q HS9-248RH-Q TEMP. RANGE (oC) -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125
The internal 100 cable termination consists of 50 from each input to ground. HS-248RH ``party line'' receivers have a Hi-Z input such that as many as ten of these receivers can be used on a single transmission line. Each transmitter input and receiver output can be connected to TTL and DTL systems. When used with shielded transmission line, the transmitter-receiver system has very high immunity to capacitance and magnetic noise coupling from adjacent conductors. The system can tolerate ground differentials of -2.0V to +20.0V (transmitter with respect to receiver). Specifications for Rad Hard QML devices are controlled by the Defense Supply Center in Columbus (DSCC). The SMD numbers listed here must be used when ordering. Detailed Electrical Specifications for these devices are contained in SMD 5962-96722 and 5962-96723.
5962R9672201VCC 5962R9672201VXC HS9-245RH/PROTO 596 2R9672301 QCC 596 2R9672301 QXC 5962R9672301VCC 5962R9672301VXC 596 2R9672302 QCC 596 2R9672302 QXC 5962R9672302VCC 5962R9672302VXC
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2003. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
HS-245RH, HS-246RH, HS-248RH Pinouts
HS9-245RH 14 PIN FLATPACK HS1-245RH 14 CERAMIC DIP MIL-STD-1835 CDIP2-T14 TOP VIEW HS9-246RH/248RH 14 PIN FLATPACK HS1-246RH/248RH 14 PIN CERAMIC DIP MIL-STD-1835 CDFP3-F14 TOP VIEW
(-) INPUT 1 (+) INPUT 2 (R1) OUTPUT 3 (-) INPUT 4 (+) INPUT 5 (R2) OUTPUT 6 GND 7 R3 R2 R1 14 VCC (R1 AND R2) 13 VCC (R3) 12 VEE (R1 AND R2) 11 VEE (R3) 10 OUTPUT (R3) 9 INPUT (+) 8 INPUT (-)
1 INPUT 1 1 OUTPUT 2 2 OUTPUT 3 2 INPUT 4 1 INPUT 5 1 OUTPUT 6 SUBSTRAT E 7 GND T2 T1 T3
14 VCC 13 INPUT 2 12 OUTPUT 2 11 OUTPUT 1 10 INPUT 1 9 8 INPUT 2 OUTPUT 2
Test Circuits and Applications
NOTES: Input: TTLH 10ns TTHL 10ns pw = 500ns f = 1MHz VOUT IOUT = 50
OPEN (3.2V)
1 IN 2 IN
0V OPEN (3.2V) 0V
VCC = +5V
1
D.U.T.
TPHL
1 OUT
TPLH
0.15V (3mA)
0V
VOUT 1 50 1 % TRANSMITTER OUT VOUT 50 1%
2
2
0.15V (3mA)
2 OUT
0V
All timing measurements referenced to 50% V points FIGURE 1. CIRCUIT #1 TRANSMITTER PROPAGATION DELAY
150mV (+) 50 (-) 50
VCC = +5V 520 D.U.T. 800 30pF RECEIVER OUTPUT
(+)IN (-) IN
0V 150mV 0V TPLH TPHL 5V
NOTES: Input: TTLH 10ns TTHL 10ns pw = 500ns f = 1MHz
RECEIVER OUT
VEE = - 5V
NOTE: External 50 resistors needed for HS-248RH
0V
All timing measurements referenced to 50% V points FIGURE 2. CIRCUIT #2 RECEIVER PROPAGATION DELAY
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HS-245RH, HS-246RH, HS-248RH Test Circuits and Applications
IN 1/3 HS-245RH (-) (NOTE) (+) 1/3 HS-248RH (-) +5V -5V "PARTY-LINE" RECEIVER OUTPUT
(Continued)
+5V (+) 50 50 +5V 1/3 HS-246RH RECEIVER OUT
ENABLE
NOTE: HS-245RH should be driven by open-collector gates. (Totem-pole output may cause slight reduction in "on" data current). For more detailed information, refer to Design Information section of this data sheet.
-5V
FIGURE 3. TYPICAL APPLICATION
Design Information
Voltage Mode Transmission
Data rates of up to 10 million bits per second can be obtained with standard TTL logic; however, the transmission distance must be very short. For example, a typical 50 foot low capacitance cable will have a capacitance of approximately 750pF which requires a current of greater than 50mA to drive 5V into this cable at 10MHz; therefore, voltage mode transmitters are undesirable for long transmission lines at high data rates due to the large current required to charge the transmission line capacitance. An emitter coupled logic gate is frequently used for a current mode transmitter. However, ECL gates are not compatible with TTL and DTL logic and they require considerable power. The Intersil HS-245RH is a TTL/DTL compatible current mode transmitter designed for high data rates on long transmission lines. Data rates of 15 megabits per second can be obtained with 50 feet of transmission line when using the companion HS-246RH receiver. Data rates of 2 megabits per second are easily obtained on transmission lines as long as 1,000 feet. The Intersil transmitter and receivers feature very low power, typically 25mW for the transmitter and 15mW for the receiver.
Current Mode Transmission
An alternate method of driving high data rates down long transmission lines is to use a current mode transmitter. Current mode logic changes the current in a low impedance transmission line and requires very little change in voltage. For example, a 2mA change in transmitter current will produce a 100mV change in receiver voltage independent of the series transmission line resistance. The rise time at the receiver for a typical 50 foot cable (750pF) is approximately 30ns for a 2mA pulse.
Intersil Transmitter/Receivers
The Intersil transmitter/receiver family consists of a triple line transmitter, two triple line receivers with internal terminations and a triple party-line receiver. The general characteristics of the transmitter and receivers are outlined in Table A.
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