View MCCS142233_205752.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
9-Bit Switchable Passive SCSI Bus Terminator (220 and 330)
The MCCS142233TM is a precision 9-bit switchable passive SCSI bus terminator with a Local-VCC (LVCC) low voltage sense circuit to latch the Enable state. When the switch is enabled according to the truth table the device provides a 220 resistance to Terminator Power (TERMPWR) and 330 resistance to Ground for SCSI termination of 9 bits. When the switch is disabled according to the truth table, the device is in a High Impedance State on all 9 bits. The low voltage sense circuit gives the device the ability to latch the current output state when power is removed from the LVCC pin. When powering down a SCSI peripheral containing this device as long as Terminator Power remains there is no interruption to the SCSI bus.
MCCS142233
9-BIT PASSIVE SCSI TERMINATOR (220 & 330)
* * * *
9 Switchable 220/330 Terminating Resistor Pairs Operating Temperature Range: 0C to 70C Operating Voltage Range: 4.25 to 5.25V Resistor Tolerance 7.5% (Over Temperature and Supply Voltage Ranges)
FN SUFFIX 20-LEAD PLASTIC PLCC PACKAGE CASE 775-02
* Resistor Ratio: R220/R330 = 220/330 2% * Local-VCC (LVCC) Low Voltage Sense Circuit * Active High or Active Low Enable Input
Truth Table Test 0 Active Mode 0 0 0 Emode 0 0 1 1 Enable 0 1 0 1 Output Terminated Z Z Terminated
Vref 18 TERMPWR B LVCC TERMPWR A Enable TERMPWR C 19 20 1 2 3 4 O1 5 O2 6 O3 7 O4 8 O5 O9 17 O8 16 O7 15 O6 14 13 12 11 10 9 GND C Test GND A Emode GND B
Test 1 Test Mode 1 1 1
Emode 0 0 1 1
Enable 0 1 0 1
Output 330 to GND 220 to TERMPWR 220 to TERMPWR 330 to GND
NOTE: All three TERMPWR pins must be connected externally. All three VGND pins must be connected externally.
Figure 1. 20-Lead Pinout (Top View)
MCCS and Mfax are trademarks of Motorola, Inc. 1/97
(c) Motorola, Inc. 1997
1
REV 1
MCCS142233
TERMPWR
120k LVCC + 86k - 220 Output 330 TTL Input Test 18k Emode Enable & Mode Control / Enable Latch Circuit
ONE OF NINE RESISTOR TERMINATORS
Vref 40k Enable
MAXIMUM RATINGS* Symbol
TERMPWR Vin Vin Vout Iin Iout ICC Tstg TL
Parameter
DC Terminator Power Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) for Emode/Test pins DC Input Voltage (Referenced to GND) for LVCC/Enable pins DC Output Voltage (Referenced to GND) DC Input Current, per pin DC Output Current, per pin DC Supply Current, TERMPWR and GND pins Storage Temperature Lead Temperature, 1mm from case for 10 seconds
Value
- 0.5 to + 6.0 - 0.5 to TERMPWR + 0.5 - 0.5 to + 6.0 - 0.5 to TERMPWR +0.5 20 35 250 - 65 to + 150 260
Units
V V V V mA mA mA C C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS Symbol
TERMPWR Vin, Vout TA tr, tf tr, tf
Parameter
DC Terminator Power Voltage (Referenced to GND) DC Input Voltage Operating Temperature Input Rise and Fall Time (All inputs but LVCC) Input Rise and Fall Time (LVCC)
Min
4.25 0 0 0 0
Max
5.25 TERMPWR 70 500 no limit
Units
V V C ns ns
MOTOROLA
2
SCSI TERMINATORS BR1486
MCCS142233
DC CHARACTERISTICS
TERMPWR Symbol VIH Parameters Min High-Level Input Voltage (Emode & Test -- HC Inputs) Min High-Level Input Voltage (Enable -- HCT Input) VIL Max Low-Level Input Voltage (Emode & Test -- HC Inputs) Max Low-Level Input Voltage (Enable -- HCT Inputs) Vout Output Voltage When Terminated Max Input Leakage Current (Emode & LVCC Inputs) Iin Max Input Leakage Current (Enable Input) Max Input Leakage Current (Test Input) IOZ ICC Max Output Leakage Current Max Quiescent Supply Current (Enable Active Low) Max Quiescent Supply Current (Comparator Active) R220 R330 Output Pull-Up Resistor Value (Note 1.) Output Pull-Down Resistor Value (Note 1.) (V) 4.25 5.25 4.25 5.25 4.25 5.25 4.25 5.25 4.25 5.25 5.25 5.25 5.25 5.25 5.25 5.25 4.25 to 5.25 4.25 to 5.25 218 327 25C Min 2.98 3.68 2.0 2.0 1.27 1.57 0.8 0.8 0.6 * TERMPWR 2% 0.10 0.10 0.10 0.50 300 500 222 333 203 305 1.0 1.0 1.0 5.0 300 800 237 355 Max 0C to + 70C Min 2.98 3.68 2.0 2.0 1.27 1.57 0.8 0.8 Max Unit V V V V V A A A A A A Condition Per Truth Table Per Truth Table Per Truth Table Per Truth Table Vin = VIH or VIL |IOUT| = 0 A Vin = TERMPWR or GND Vref = TERMPWR Vin = TERMPWR Vin = GND Per Truth Table Emode/Vref/LVCC = TERMPWR Enable/Test = GND Enable/LVCC = TERMPWR Emode/Vref/Test = GND Enable/Test/LVCC = TERMPWR Emode/Vref/ = GND Test/LVCC = TERMPWR Enable/Emode/Vref/ = GND
1. Resistor Values are compensated for a 30C ambient to junction temperature delta. See "Thermal Considerations" section for a detailed explanation and formula. See Figures 3 & 4 for "Temperature Characteristics of Resistor Values".
Symbol VT-
Parameter Max Latch Voltage (LVCC Input)
TERMPWR (V) 4.25 4.75 5.25 4.25 4.75 5.25
Typical @ +25C 3.50 3.90 4.25 4.00 4.40 4.75
Unit V
Condition Per Truth Table
VT+
Min Unlatch Voltage (LVCC Input)
V
Per Truth Table
SCSI TERMINATORS BR1486
3
MOTOROLA
MCCS142233
Option 1
3.0 V 1.5 V
ENABLE 0V
(TERMPWR) V EMODE (0.5 TERMPWR) V 0V
Option 2
(TERMPWR) V (0.5 TERMPWR) V
EMODE 0V
3.0 V 1.5 V 0V
ENABLE
Output Waveform
Output Load: 1k to Gnd 1 10% 2 0V 90% 3 90% 4 10%
(TERMPWR) V (0.6 * TERMPWR) V
0V
(TERMPWR) V 5 Output Load: 1K to TERMPWR 90% 6 10% 7 10% 8 90% (0.6 * TERMPWR) V 0V
Note: T ==> Terminated Level Z(0) ==> Tristate Low Level Z(1) ==> Tristate High Level
1 ==> tpZ(0)T 2 ==> tpTZ(0) 3 ==> tpTZ(0) 4 ==> tp Z(0)T
5 ==> tpZ(1)T 6 ==> tpTZ(1) 7 ==> tpTZ(1) 8 ==> tpZ(1)T
Figure 2. AC Characteristics Input Waveform Options
MOTOROLA
4
SCSI TERMINATORS BR1486
MCCS142233
AC CHARACTERISTICS: (TERMPWR = 4.75 0.5 V, CL = 50 pF, tr = tf = 6 ns)
25C Symbol tpTZ(0) tpTZ(1) tpZ(0)T tpZ(1)T Parameters Propagation Delay, Enable or Emode to Outputs Propagation Delay, Enable or Emode to Outputs Min - - - - Max 150 100 150 100 0C to + 70C Min - - - - Max 200 150 200 150 ns Unit ns Condition 1 K to GND (See Figure 2) 1 K to TERMPWR (See Figure 2) 1 K to GND (See Figure 2) 1 K to TERMPWR (See Figure 2)
TIMING REQUIREMENTS: (TERMPWR = 4.75 0.5 V, CL = 50 pF, tr = tf = 6 ns)
25C Symbol ts th Parameters Setup Time, LVCC to Enable Hold Time, LVCC to Enable Min 200 50 Max - - 0C to + 70C Min 500 100 Max - - Unit ns Condition See Figure 3
4.75V LVCC tsetup Enable 50% VCC 50% VCC 0.0V thold enabled 50% disabled 1.5V 3.0V 0.0V
* If LVCC Enable is grounded then the LVCC feature is disabled. Figure 3. Timing Requirements
SCSI TERMINATORS BR1486
5
EEEE EEEE EEEE
EEEEEE EEEEEE EEEEEE
MOTOROLA
MCCS142233
+30 +20
( )
USL(220 +7.5%) 220 +5% +6 Mean -6
+10 Nominal -10 -20 -30 -75 -50
Resistance
220 -5% LSL(220 -7.5%)
-25
0
25
50
75
100
125
Temperature (C) USL = Upper Spec Limit LSL = Lower Spec Limit
Figure 4. Temperature Characteristic of 220 Resistor
+30 USL(330 +7.5%) +20
( )
330 +5%
+10 Nominal +6 Mean -6
Resistance
-10 330 -5% -20 LSL(330 -7.5%) -30 -75 -50 -25 0 25 50 75 100 125
Temperature (C) USL = Upper Spec Limit LSL = Lower Spec Limit
Figure 5. Temperature Characteristic of 330 Resistor
MOTOROLA
6
SCSI TERMINATORS BR1486
MCCS142233
MCCS142233 Applications Information
Enable & Emode:
The Enable and Emode input pins work together to determine the state of the termination resistors; either terminated(Enabled) or high impedance(Disabled). Enable and Emode allow the user to select the polarity of the enable signal to match the system logic signal used to drive the Enable input. If Emode is tied "high" (to TERMPWR), the enable input becomes active "high". Conversely, with Emode tied "low" (to GND), the Enable input becomes active low. This eliminates the need to add external inversion to the Enable signal regardless of the polarity of the system signal provided to the MCCS142233. Emode can be used instead of Enable to select the state of the termination resistors. Emode has CMOS input levels, while Enable has TTL-compatible input levels. feature, Vref must be tied to GND. Series resistance supplied by the user between Vref and GND will alter the data sheet latch threshold of LVCC. Thus the LVCC threshold may be tailored to the user's specific requirements. Note: The input ESD structures on the Enable and LVCC inputs do not incorporate a diode to TERMPWR. Loss of TERMPWR will not result in the local power supply attempting to source TERMPWR to the system. Likewise, if the local supply (5.5 V maximum) exceeds TERMPWR (4.25 V minimum) current will not be drawn from the local power supply to TERMPWR through the MCCS142233. Use of the Local-VCC sensing feature is only appropriate when the Enable input is driven by system logic. If the MCCS142233 is to be enabled using a wire jumper or throw switch, the user can disable the Local-VCC sensing circuitry by hardwiring the LVCC and Vref pins to TERMPWR. This will eliminate the power consumed by the comparator and reference circuitry to attain the lowest standby power condition possible.
LVCC & Vref : LVCC (Local-VCC) and Vref pins provide a means for latching the proper termination state when the Enable input is driven by local logic. With Enable under local system logic control, the possibility exists for the peripheral containing the MCCS142233 to be powered down. The termination circuitry will still be powered from TERMPWR, but the Enable signal supplied to the chip by local logic will be lost. With the LVCC input tied to the peripheral's internal power supply, the MCCS142233 will sense the loss of local power prior to loss of a valid Enable input signal, and will latch the Enable state which is present prior to local power loss.
The Vref pin is the analog ground for the Local-VCC comparator and reference circuitry. For proper use of this
Test: The Test pin is used to open circuit one resistor branch of each terminator pair ("Test Mode") to facilitate measurement of the resistor value in production. It is held low internally through a pulldown resistor to operate the device in the "Active Mode" per the truth table. The Test mode may be of use in system debug once the MCCS142233 is on the PC board. It is recommended to leave the Test pin either unconnected (pulled low internally) or grounded depending on whether the "Test Mode" offers any utility to the user in the system configuration.
Enable Input Application
A. No Connection to Enable
Result
Enable input will be pulled "high" internally. Termination state will depend upon the polarity of the Emode input. Emode should be hardwired "high" or the termination will be permanently disabled. Enable input will be pulled "high" internally when the switch is open. Enable input will be held "low" when the switch is closed. Termination state will depend upon the polarity of the Emode input. This is a more expensive way to accomplish application B. above. It is more economical to allow the internal pullup to provide the "high" input level. With Emode also hardwired "high", the MCCS142233 will be permanently enabled and provide termination on all outputs. With Emode hardwired "low", the chip will be permanently disabled. With Emode also hardwired "low", the MCCS142233 will be permanently enabled and provide termination on all outputs. With Emode hardwired "high" the chip will be permanently disabled. Application D. above is preferred over E. since D. does not draw current through the Enable input pull-up resistor. With LVCC input connected to the local power supply and Vref connected to GND, the Local-VCC sensing and Enable latching feature will be active. If this feature is not desired, tie LVCC and Vref to TERMPWR.
B. Single Pole Switch to GND
C. Double Pole Switch to Both TERMPWR and GND D. Hardwired "High"
E. Hardwired "Low"
F. External Logic Driven
SCSI TERMINATORS BR1486
7
MOTOROLA
MCCS142233
OUTLINE DIMENSIONS
FN SUFFIX PLASTIC PACKAGE CASE 775-02 ISSUE C B -N- Y BRK D -L- -M- W D X V VIEW D-D Z 0.007 (0.180) M T L-M U
S
N
S S
0.007 (0.180) M T L-M
N
S
20
1
G1
0.010 (0.250)
S
T L-M
S
N
S
A Z R
0.007 (0.180) M T L-M 0.007 (0.180) M T L-M
S
N N
S
S
S
H
0.007 (0.180) M T L-M
S
N
S
C
E 0.004 (0.100) G G1 0.010 (0.250) S T L-M J -T-
SEATING PLANE
K1 K F VIEW S 0.007 (0.180)
M
VIEW S
S
T L-M
S
N
S
N
S
NOTES: 1. DATUMS -L-, -M-, AND -N- DETERMINED WHERE TOP OF LEAD SHOULDER EXITS PLASTIC BODY AT MOLD PARTING LINE. 2. DIMENSION G1, TRUE POSITION TO BE MEASURED AT DATUM -T-, SEATING PLANE. 3. DIMENSIONS R AND U DO NOT INCLUDE MOLD FLASH. ALLOWABLE MOLD FLASH IS 0.010 (0.250) PER SIDE. 4. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 5. CONTROLLING DIMENSION: INCH. 6. THE PACKAGE TOP MAY BE SMALLER THAN THE PACKAGE BOTTOM BY UP TO 0.012 (0.300). DIMENSIONS R AND U ARE DETERMINED AT THE OUTERMOST EXTREMES OF THE PLASTIC BODY EXCLUSIVE OF MOLD FLASH, TIE BAR BURRS, GATE BURRS AND INTERLEAD FLASH, BUT INCLUDING ANY MISMATCH BETWEEN THE TOP AND BOTTOM OF THE PLASTIC BODY. 7. DIMENSION H DOES NOT INCLUDE DAMBAR PROTRUSION OR INTRUSION. THE DAMBAR PROTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE GREATER THAN 0.037 (0.940). THE DAMBAR INTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE SMALLER THAN 0.025 (0.635).
DIM A B C E F G H J K R U V W X Y Z G1 K1
INCHES MIN MAX 0.385 0.395 0.385 0.395 0.165 0.180 0.090 0.110 0.013 0.019 0.050 BSC 0.026 0.032 0.020 --- 0.025 --- 0.350 0.356 0.350 0.356 0.042 0.048 0.042 0.048 0.042 0.056 --- 0.020 2_ 10 _ 0.310 0.330 0.040 ---
MILLIMETERS MIN MAX 9.78 10.03 9.78 10.03 4.20 4.57 2.29 2.79 0.33 0.48 1.27 BSC 0.66 0.81 0.51 --- 0.64 --- 8.89 9.04 8.89 9.04 1.07 1.21 1.07 1.21 1.07 1.42 --- 0.50 2_ 10 _ 7.88 8.38 1.02 ---
MOTOROLA
8
SCSI TERMINATORS BR1486
MCCS142233
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405; Denver, Colorado 80217. 303-675-2140 or 1-800-441-2447 MfaxTM: RMFAX0@email.sps.mot.com - TOUCHTONE 602-244-6609 INTERNET: http://Design-NET.com
JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 81-3-3521-8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298
SCSI TERMINATORS BR1486 9
MCCS142233/D MOTOROLA

▲Up To Search▲

Price & Availability of MCCS142233

	To Download MCCS142233 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .