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Part: 74LVXC3245WM
Category:
Description: 8-Bit Dual Supply Configurable Voltage Interface Transceiver With 3-STATE Outputs
Company: Fairchild Semiconductor
Datasheet: Download 74LVXC3245WM datasheet File size : 110 kB
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Datasheet text preview:
74LVXC3245 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
February 1994 Revised July 1999
74LVXC3245 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
General Description
The LVXC3245 is a 24-pin dual-supply, 8-bit configurable voltage interface transceiver suited for PCMCIA and other real time configurable I/O applications. The VCCA pin accepts a 3V supply level. The A Port is a dedicated 3V port. The VCCB pin accepts a 3V-to-5V supply level. The B Port is configured to track the VCCB supply level respectively. A 5V level on the VCC pin will configure the I/O pins at a 5V level and a 3V VCC will configure the I/O pins at a 3V level. The A Port should interface with a 3V host system and the B Port to the card slots. This device will allow the VCCB voltage source pin and I/O pins on the B Port to float when OE is HIGH. This feature is necessary to buffer data to and from a PCMCIA socket that permits PCMCIA cards to be inserted and removed during normal operation.
Features
s Bidirectional interface between 3V and 3V-to-5V buses s Control inputs compatible with TTL level s Outputs source/sink up to 24 mA s Guaranteed simultaneous switching noise level and dynamic threshold performance s Implements patented EMI reduction circuitry s Flexible VCCB operating range s Allows B Port and VCCB to float simultaneously when OE is HIGH s Functionally compatible with the 74 series 245
Ordering Code:
Order Number 74LVXC3245WM 74LVXC3245QSC 74LVXC3245MTC Package Number M24B MQA24 MTC24 Package Description 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending suffix letter "X" to the ordering code.
Logic Symbol
Connection Diagram
Pin Descriptions
Pin Names OE T/R A0A7 B0B7 Description Output Enable Input Transmit/Receive Input Side A Inputs or 3-STATE Outputs Side B Inputs or 3-STATE Outputs
© 1999 Fairchild Semiconductor Corporation
DS012008
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74LVXC3245
Truth Table
Inputs OE L L H
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial
Outputs T/R L H X Bus B Data to Bus A Bus A Data to Bus B HIGH-Z State
Logic Diagram
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74LVXC3245
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCCA, VCCB) DC Input Voltage (VI) @ OE, T/R DC Input/Output Voltage (VI/O) @ An @ Bn DC Input Diode Current (IIK) @ OE, T/R DC Output Diode (IOK) Current DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND ) and Max Current Storage Temperature Range (TSTG) DC Latch-Up Source or Sink Current ±50 mA ±200 mA -65°C to +150°C ±300 mA ±20 mA ±50 mA ±50 mA -0.5V to VCCA +0.5V -0.5V to VCCB +0.5V -0.5V to +7.0V -0.5V to VCCA +0.5V
Recommended Operating Conditions (Note 2)
Supply Voltage VCCA VCCB Input Voltage (VI) @ OE, T/R Input Output Voltage (VI/O) @ An @ Bn Free Air Operating Temperature (TA) Minimum Input Edge Rate (V/t) VIN from 30% to 70% of VCC VCC @ 3.0V, 4.5V, 5.5V
Note 1: The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation. Note 2: The A Port unused pins (inputs or I/Os) must be held HIGH or LOW. They may not float.
2.7V to 3.6V 3.0V to 5.5V 0V to VCCA 0V to VCCA 0V to VCCB -40°C to +85°C 8 ns/V
DC Electrical Characteristics
Symbol VIHA Parameter Minimum HIGH Level Input Voltage VIHB An, OE T/R Bn VCCA (V) 2 .7 3.0 3.6 2.7 3.0 3.6 VILA Maximum LOW Level Input Voltage VILB An, OE T/R Bn 2 .7 3.0 3.6 2.7 3.0 3.6 VOHA Minimum HIGH Level Output Voltage 3.0 3 .0 3.0 2.7 2.7 VOHB 3.0 3.0 3.0 3.0 VOLA Maximum LOW Level Output Voltage 3 .0 3 .0 2.7 2.7 VOLB 3.0 3.0 3.0 IIN Maximum Input Leakage Current @ OE, T/R 3 .6 3 .6 VCCB (V) 3.0 3 .6 5 .5 3 .0 3 .6 5 .5 3.0 3 .6 5 .5 3 .0 3 .6 5 .5 3 .0 3.0 3 .0 3 .0 4 .5 3 .0 3 .0 3 .0 4 .5 3.0 3.0 3 .0 4 .5 3 .0 3 .0 4 .5 3.6 5.5 2.99 2 .85 2.65 2.5 2.3 2.99 2.85 2.65 4.25 0 .002 0 .21 0.11 0.22 0.002 0.21 0.18 TA = 25°C Typ 2 .0 2.0 2.0 2.0 2.0 3.85 0 .8 0.8 0.8 0.8 0.8 1.65 2.9 2 .56 2.35 2 .3 2 .1 2.9 2.56 2.35 3.86 0.1 0 .36 0.36 0.42 0.1 0.36 0.36 ± 0.1 ± 0.1 TA = -40°C to +85°C Guaranteed Limits 2.0 2 .0 2 .0 2 .0 2 .0 3.85 0.8 0 .8 0 .8 0 .8 0 .8 1.65 2 .9 2.46 2.25 2.2 2.0 2 .9 2.46 2.25 3.76 0 .1 0.44 0.44 0.5 0 .1 0.44 0.44 ±1.0 ±1.0 µA V V V V IOUT = -100 µA IOH = -12 mA IOH = -24 mA IOH = -12 mA IOH = -24 mA IOUT = -100 µA IOH = -12 mA IOH = -24 mA IOH = -24 mA IOUT = 100 µA IOL = 24 mA IOL = 12 mA IOL = 24 mA IOUT = 100 µA IOL = 24 mA IOL = 24 mA VI = VCCA, GND V VOUT 0.1V or VCC - 0.1V V Units Conditions VOUT 0.1V or VCC - 0.1V
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74LVXC3245
DC Electrical Characteristics
Symbol IOZA Parameter Maximum 3-STATE Output Leakage @ An IOZB Maximum 3-STATE Output Leakage @ Bn ICC IC C A 1 Maximum ICC/Input Quiescent VCCA Supply Current as B Port Floats IC C A 2 Quiescent VCCA Supply Current 3.6 3.6 3 .6 5.5 3.6 Bn All Inputs 3.6 3.6 5 .5 3 .6 3.6 3.6 3.6 5 .5 VCCA (V) 3.6 3.6
(Continued)
TA = 25°C Typ ± 0.5 ± 0.5 ± 0.5 ± 0.5 1.0 1 .35 0.35 5 TA = -40°C to +85°C Guaranteed Limits ± 5.0 ± 5.0 ± 5.0 ± 5.0 1 .5 0.5 50 µA µA VI = VIL, VIH, OE = VCCA VO = VCCA, GND VI = VIL, VIH, OE = VCCA VO = VCCB, GND mA VI = VCCB2.1V VI = VCC0.6V An = VCCA or GND Bn = Open, OE = V CCA, T/R = VCCA, V CCB = Open 5 5 50 50 µA An = VCCA or GND, Bn = VCCB or GND, OE = GND, T/R = GND An = VCCA or GND, µA Bn = VCCB or GND, OE = GND, T/R = VCCA (Note 3)(Note 4) (Note 3)(Note 4) (Note 3)(Note 4) (Note 3)(Note 4) (Note 3)(Note 5) (Note 3)(Note 5) (Note 3)(Note 5) (Note 3)(Note 5)
VCCB (V) 3.6 5 .5
Un its
Conditions
Open
µA
ICCB
Quiescent VCCB Supply Current
3.6 3.6
3 .6 5.5
5 8
50 80
VOLPA VOLPB VOLVA VOLVB VIHDA VIHDB VILDA VILDB
Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum LOW Level Dynamic Input Voltage
3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3 .3 3 .3 3.3 3.3 3 .3 3 .3 3.3
3 .3 5.0 3 .3 5 .0 3 .3 5.0 3 .3 5 .0 3.3 5.0 3.3 5 .0 3.3 5.0 3.3 5 .0
0.8 0.8 0.8 1.5 - 0.8 - 0.8 - 0.8 - 1.2 2.0 2 .0 2 .0 3.5 0.8 0 .8 0 .8 1.5
V V V V V V V V
Note 3: Worst case package. Note 4: Max number of outputs defined as (n). Data inputs are driven 0V to VCC level; one output at GND. Note 5: Max number of Data Inputs (n) switching. (n1) inputs switching 0V to VCC level. Input-under-test switching: VCC level to threshold (VIHD), 0V to threshold (VILD), f = 1 MHz.
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74LVXC3245
AC Electrical Characteristics
TA = +25°C CL = 50 pF Symbol Parameter VCCA = 2.7V3.6V VCCB = 4.5V5.5V Min tPHL tPLH tPHL tPLH tPZL tPZH tPZL tPZH tPHZ tPLZ tPHZ tPLZ tOSHL tOSLH Propagation Delay A to B Propagation Delay B to A Output Enable Time OE to B Output Enable Time OE to A Output Disable Time OE to B Output Disable Time OE to A Output to Output Skew (Note 8) Data to Output
Note 6: Typical values at VCCA = 3.3V, VCCB = 5.0V @ 25°C. Note 7: Typical values at VCCA = 3.3V, VCCB = 3.3V @ 25°C. Note 8: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH). Parameter guaranteed by design.
TA = -40°C to +85°C CL = 50 pF VCCA = 2.7V3.6V VCCB = 4.5V5.5V Min 1.0 1.0 1.0 1.0 1 .0 1 .0 1 .0 1 .0 1 .0 1 .0 1 .0 1 .0 Max 8 .5 7 .0 7 .0 8 .0 8.5 9.0 10.0 9.5 8.5 8.0 10.0 7.0
TA = +25°C CL = 50 pF VCCA = 2.7V3.6V VCCB = 3.0V3.6V Min 1.0 1.0 1.0 1.0 1 .0 1 .0 1.0 1 .0 1 .0 1 .0 1.0 1 .0 Typ (Note 7) 5 .5 5 .2 4 .4 5 .1 6.0 6.1 6 .4 5.8 6.3 4.5 5 .2 3.4 M ax 8.5 8.0 7.0 7.5 9 .0 9 .5 10.0 9 .0 9 .5 8 .0 9.5 6 .5
TA = -40°C to +85°C CL = 50 pF VCCA = 2.7V3.6V VCCB = 3.0V3.6V Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 9.0 8.5 7.5 8.0 9.5 10.0 10.5 9.5 10.0 8.5 10.0 7.0 Units
Typ (Note 6) 4.8 3.9 3.8 4.3 4.7 4.8 5.9 5.4 4.0 3.8 4.6 3.1
Max 8.0 6.5 6.5 7.5 8.0 8.5 9.5 9.0 8.0 7.5 9.5 6.5
1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
ns ns ns
ns
ns
ns
1.0
1.5
1.5
1.0
1.5
1.5
ns
Capacitance
Symbol CIN CI/O CPD Input Capacitance Input/Output Capacitance Power Dissipation Capacitance (Note 9)
Note 9: CPD is measured at 10 MHz.
Parameter
Typ 4.5 10 AB BA 50 40
Units pF pF pF pF VCC = Open VCCA = 3.3V VCCB = 5.0V VCCB = 5.0V VCCA = 3.3V
Conditions
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