 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| PRELIMINARY 3.3V ABT Octal Bus Transceiver with 3-State Output 54LVTH245A Memory Logic Diagram (Positive Logic) FEATURES: * 3.3V ABT octal bus transceiver with 3-state outputs * RAD-PAK(R) radiation hardened against natural space radiation * Total dose hardness: - >100 krad (Si), depending upon space misssion * Package: - 20 pin RAD-PAK(R) flat package - 20 pin RAD-PAK(R) DIP * Operating temperature range: -55 to 125C * Supports mixed-mode signal operation - 5V input and output voltages with 3.3V VCC * Supports unregulated battery operation down to 2.7V. * Typical VOLP (output ground bounce) < 0.8V at VCC=3.3V, TA= 25C * Latch-up performance exceeds 500mA per JEDEC standard * Supports live insertion * Bus-hold data inputs eliminate the need for external pullup resistors DESCRIPTION: Maxwell Technologies' 54LVTH245A 8-bit octal transceiver micro-circuit features a greater than 100 krad (Si) total dose tolerance, depending upon space mission. The 54LVTH245A is designed specifically for low voltage (3.3V) VCC operation, but with the capability to provide a TTL interface to a 5V system environment. It is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction control (DIR) input. The output enable (OE) input can be used to disable the device so the buses are effectively isolated. The 54LVTH245A active bus-hold circuitry is provided to prevent floating data inputs at a valid logic level and to eliminate the need for external pullup resistors. Maxwell Technologies' patented RAD-PAK(R) packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or space mission. In a GEO orbit, RAD-PAK provides greater than 100 krad (Si) radiation dose tolerance. This product is available with screening up to Class S. 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 1 (858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT Octal Bus Transceiver with 3-State Output TABLE 1. PINOUT DESCRIPTION PIN 1 2-9 10 11-18 19 20 SYMBOL DIR A1-A8 GND B8-B1 OE VCC DESCRIPTION DirectionControl Inputs Ground Outputs Output Enable Supply Voltage 54LVTH245A TABLE 2. 54LVT245 ABSOLUTE MAXIMUM RATINGS 1 PARAMETER Supply Voltage Range Input Voltage Range 2 SYMBOL VCC VI VO IO IIK IOK 55C PD TA TS MIN -0.5 -0.5 -0.5 -----55 -65 MAX 4.6 7.0 7.0 48 -50 -50 1.6 125 150 UNIT V V V mA mA mA mW C C Memory Voltage Range Applied to Any Output in the High State or Power-Off State Current Into Any Output in the High State 3 Input Clamp Current (VI < 0) Output Clamp Current (VO < 0) Maximum Power Dissipation at TA = Operating Temperature Storage Temperature Range 1. Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 3. This current flows only when the output is in the high state and VO > VCC. TABLE 3. DELTA LIMITS PARAMETER ICC(OL) ICC(OH) ICC(OD) VARIATION 10% of specified value in Table 5 10% of specified value in Table 5 10% of specified value in Table 5 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 2 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT Octal Bus Transceiver with 3-State Output 54LVTH245A TABLE 4. 54LVTH245A RECOMMENDED OPERATING CONDITIONS 1 PARAMETER Supply Voltage High-level Input Voltage Low-level Input Voltage Input Voltage High-level Output Current Low-level Output Current Input Transition Rise or Fall Rate Operating Temperature Outputs enabled SYMBOL VCC VIH VIL VI IOH IOL MIN 2.7 2.0 ------55 MAX 3.6 -0.8 5.5 -24 48 10 125 UNIT V V V V mA mA ns/V C t/v TA 1. Unused control inputs must be held high or low to prevent them from floating. Memory TABLE 5. 54LVTH245A ELECTRICAL CHARACTERISTICS (VCC = 3.3V 10%, TA = -55 to +125C, UNLESS OTHERWISE SPECIFIED) PARAMETER Input Clamp Voltage High-Level Output Voltage SYMBOL VIK VOH VCC = 2.7 VCC = 2.7V to 3.6V VCC = 2.7V VCC = 3V, Low-Level Output Voltage VOL VCC = 2.7V VCC = 3V TEST CONDITIONS II = -18mA IOH = -100A IOH = -8mA IOH = -24mA IOL = 100A IOL = 24mA IOL = 16mA IOL = 32mA IOL = 48mA Input Current II VCC = 3.6V VCC = 0 or 3.6V VCC = 3.6V VI = VCC or GND VI = 5.5V VI = 5.5V VI = VCC VI = 0 Hold Current Power Up Current Power Down Current II(HOLD) VCC = 3V IOZPU IOZPD 2 2 MIN -VCC -0.2 2.4 2.0 -------A or B Ports --A or B Ports 75 -75 --- MAX -1.2 ---0.2 0.5 0.4 0.5 0.55 1 10 20 1 -5 --100 100 UNIT V V V Control inputs A VI = 0.8V VI = 2V A A A VCC = 0 to 1.5V, VO = 0.5V to 3V, OE = don't care VCC = 1.5V to 0, VO = 0.5V to 3V, OE = don't care 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 3 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT Octal Bus Transceiver with 3-State Output PARAMETER Supply Current SYMBOL ICC VCC = 3.6V IO = 0 VI = VCC or GND Delta Supply Current Input Capacitance Input Output Capacitance VCC or GND TEST CONDITIONS Outputs high Outputs low 54LVTH245A MIN ------MAX 0.39 14 0.39 0.2 8 15 mA pF pF UNIT mA TABLE 5. 54LVTH245A ELECTRICAL CHARACTERISTICS (VCC = 3.3V 10%, TA = -55 to +125C, UNLESS OTHERWISE SPECIFIED) Outputs disabled ICC 1 VCC = 3V to 3.6V, One input at VCC -0.6V, Other inputs at CI2 CO 2 VI = 3V or 0 VO = 3V or 0 1. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND. 2. Guaranteed by design. TABLE 6. 54LVTH245A AC ELECTRICAL CHARACTERISTICS (VCC = 3.3V 10%, TA = -55 RO 125C, UNLESS OTHERWISE NOTED) PARAMETER Propagation Delay Time A orB to B or A Output Enable Time OE to A or B Output Disable Time OE to A or B SYMBOL VCC = 3.3V 0.3V MIN tPLH tPHL tPZH tPZL tPHZ tPLZ 0.7 0.7 1.2 1.6 1.8 1.8 MAX 3.7 3.7 5.7 5.7 6.2 5.3 MIN ------VCC = 2.7V MAX 4.2 4.2 7.4 6.8 6.8 5.5 ns ns ns UNIT Memory TABLE 7. FUNCTION TABLE INPUTS OE L l H DIR L H X B data to A bus A data to B bus Isolation OPERATION 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 4 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT Octal Bus Transceiver with 3-State Output FIGURE 1. LOAD CIRCUIT 54LVTH245A Figure Note: 1. CL includes probe and jig capacitance. PARAMETER MEASUREMENT INFORMATION TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH S1 Open 6V Memory GND FIGURE 2. PULSE DURATION FIGURE 3. SETUP AND HOLD TIMES 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 5 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT Octal Bus Transceiver with 3-State Output 54LVTH245A FIGURE 4. PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS FIGURE 5. ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING Memory Figure Note: 2. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by The output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 6 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT Octal Bus Transceiver with 3-State Output 54LVTH245A Memory 20 PIN RAD-PAK(R) FLAT PACKAGE SYMBOL MIN A b c D E E1 E2 E3 e L Q S1 N 0.370 0.035 0.005 0.128 0.015 0.003 0.470 0.287 -0.155 0.030 DIMENSION NOM 0.141 0.017 0.005 0.480 0.295 -0.160 0.068 0.050 BSC 0.380 0.039 0.007 20 0.390 0.042 -MAX 0.154 0.022 0.009 0.490 0.303 0.333 --- F20-01 Note: All dimensions in inches 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 7 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY 3.3V ABT Octal Bus Transceiver with 3-State Output Important Notice: 54LVTH245A These data sheets are created using the chip manufacturer's published specifications. Maxwell Technologies verifies functionality by testing key parameters either by 100% testing, sample testing or characterization. The specifications presented within these data sheets represent the latest and most accurate information available to date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no responsibility for the use of this information. Maxwell Technologies' products are not authorized for use as critical components in life support devices or systems without express written approval from Maxwell Technologies. Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Technologies. Maxwell Technologies' liability shall be limited to replacement of defective parts. Memory 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 8 (c)2001 Maxwell Technologies All rights reserved. PRELIMINARY Product Ordering Options Model Number 54LVTH245A RP F 3.3V ABT Octal Bus Transceiver with 3-State Output 54LVTH245A X Feature Option Details Screening Flow Monolithic S = Maxwell Class S B = Maxwell Class B E = Engineering (testing @ +25C) I = Industrial (testing @ -55C, +25C, +125C) Memory Package F = Flat Pack Radiation Feature RP = RAD-PAK(R) package Base Product Nomenclature Octal Bus Transceiver with 3State Output 1000597 12.19.01 Rev 1 All data sheets are subject to change without notice 9 (c)2001 Maxwell Technologies All rights reserved. |
Price & Availability of 54LVTH245ARPFS
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |