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IDT74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
FEATURES: DESCRIPTION:
IDT74FCT3245/A
* 0.5 MICRON CMOS Technology * ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) * VCC = 3.3V 0.3V, Normal Range * VCC = 2.7V to 3.6V, Extended Range * CMOS power levels (0.4W typ. static) * Rail-to-Rail output swing for increased noise margin * Available in QSOP, SOIC, SSOP, and TSSOP packages
The FCT3245/A octal transceivers are built using advanced dual metal CMOS technology. These high-speed, low-power transceivers are ideal for asynchronous communication between two buses (A and B). The direction control pin (DIR) controls the direction of data flow. The output enable pin (OE) overrides the direction control and disables both ports. All inputs are designed with hysteresis for improved noise margin. The FCT3245/A has series current limiting resistors. These offer low ground bounce, minimal undershoot, and controlled output fall timesreducing the need for external series terminating resistors.
FUNCTIONAL BLOCK DIAGRAM
DIR
1 19 2
OE B1 B2 B3 B4 B5 B6 B7 B8
A1
3
18
A2 A3
4
17
16 5
A4 A5 A6 A7 A8
6
15
14 7 13 8 12 9 11
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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NOVEMBER 2000
DSC-2650/10
(c) 2000 Integrated Device Technology, Inc.
IDT74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) Description Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Storage Temperature DC Output Current Max -0.5 to +4.6 -0.5 to +7 -0.5 to VCC+0.5 -65 to +150 -60 to +60 Unit V V V C mA
DIR A1 A2 A3 A4 A5 A6 A7 A8 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
Vcc OE B1 B2 B3 B4 B5 B6 B7 B8
VTERM(4) TSTG IOUT
NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. VCC terminals. 3. Input terminals. 4. Outputs and I/O terminals.
QSOP/ SOIC/ SSOP/ TSSOP TOP VIEW
CAPACITANCE (TA = +25C, F = 1.0MHz)
Symbol CIN COUT Parameter(1) Input Capacitance Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 3.5 4 Max. 6 8 Unit pF pF
NOTE: 1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names OE DIR Ax Bx Description 3-State Output Enable Inputs (Active LOW) Direction Control Output Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs
FUNCTION TABLE(1)
Inputs OE L L H
NOTE: 1. H = HIGH Voltage Level X = Don't Care L = LOW Voltage Level Z = High Impedance
DIR L H X
Outputs Bus B Data to Bus A Bus A Data to Bus B High Z State
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IDT74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 2.7V to 3.6V
Symbol VIH VIL IIH IIL IOZH IOZL VIK IODH IODL VOH Parameter Input HIGH Level (Input pins) Input HIGH Level (I/O pins) Input LOW Level (Input and I/O pins) Input HIGH Current (Input pins) Input HIGH Current (I/O pins) Input LOW Current (Input pins) Input LOW Current (I/O pins) High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Output HIGH Current Output LOW Current Output HIGH Voltage VCC = Min., IIN = -18mA VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) VCC = Min. VIN = VIH or VIL VCC = 3V VIN = VIH or VIL VOL Output LOW Voltage VCC = Min. VIN = VIH or VIL VCC = 3V VIN = VIH or VIL IOS VH ICCL ICCH ICCZ Short Circuit Current(4) Input Hysteresis Quiescent Power Supply Current VCC = Max., VO = GND(3) -- VCC = Max., VIN = GND or VCC -60 -- -- -135 150 0.1 -240 -- 10 mA mV A IOL = 0.1mA IOL = 16mA IOL = 24mA IOL = 24mA -- -- -- -- 0.2 0.3 0.3 0.2 0.4 0.55 0.5 V IOH = -0.1mA IOH = -3mA IOH = -8mA VCC = Max. VCC = Max. VI = 5.5V VI = VCC VI = GND VI = GND VO = VCC VO = GND -- -- -- -- -- -- -- -36 50 VCC-0.2 2.4 2.4(5) -- -- -- -- -- -- -0.7 -60 90 -- 3 3 1 1 1 1 1 1 -1.2 -110 200 -- -- -- V mA mA V A A Guaranteed Logic LOW Level Test Conditions(1) Guaranteed Logic HIGH Level Min. 2 2 -0.5 Typ.(2) -- -- -- Max. 5.5 Vcc+0.5 0.8 V Unit V
NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 3.3V, +25C ambient and maximum loading. 3. Not more than one output should be tested at one time. Duration of the test should not exceed one second. 4. This parameter is guaranteed but not tested. 5. VOH = VCC - 0.6V at rated current.
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IDT74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICC ICCD Parameter Quiescent Power Supply Current Dynamic Power Supply Current(4) VCC = Max. VCC = Max. Outputs Open OE = DIR = GND One Input Toggling 50% Duty Cycle IC Total Power Supply Current(6) VCC = Max. Outputs Open fI = 10MHz 50% Duty Cycle OE = DIR = GND One Bit Toggling VCC = Max. Outputs Open fI = 2.5MHz 50% Duty Cycle OE = DIR = GND Eight Bits Toggling
NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 3.3V, +25C ambient. 3. Per TTL driven input. All other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of ICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCPNCP/2 + fiNi) ICC = Quiescent Current (ICC, ICCH, and ICCZ) ICC = Power Supply Current for a TTL High Input DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for register devices (zero for non-register devices) NCP = Number of clock inputs at fCP fi = Input Frequency Ni = Number of Inputs at fi
Test Conditions(1) VIN = VCC - 0.6V VIN = VCC VIN = GND
Min. -- --
Typ.(2) 2 60
Max. 30 85
Unit A A/ MHz
VIN = VCC VIN = GND VIN = VCC - 0.6V VIN = GND VIN = VCC VIN = GND VIN = VCC - 0.6V VIN = GND
--
0.6
0.9
mA
--
0.6
0.9
--
1.2
1.7(5)
--
1.2
1.8(5)
SWITCHING CHARACTERISTICS OVER OPERATING RANGE(1)
74FCT3245 Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ Parameter Propagation Delay A to B, B to A Output Enable Time OE to A or B Output Disable Time OE to A or B Output Enable Time DIR to A or B(4) Output Disable Time DIR to A or B(4) Condition CL = 50pF RL = 500
(2)
74FCT3245A Max. 7 9.5 7.5 9.5 7.5 Min. 1.5 1.5 1.5 1.5 1.5
(3)
Min. 1.5 1.5 1.5 1.5 1.5
(3)
Max. 4.6 6.2 5 6.2 5
Unit ns ns ns ns ns
NOTES: 1. Propagation Delays and Enable/Disable times are with VCC = 3.3V 0.3V, Normal Range. For VCC = 2.7V to 3.6V, Extended Range, all Propagation Delays and Enable/ Disable times should be degraded by 20%. 2. See test circuit and waveforms. 3. Minimum limits are guaranteed but not tested on Propagation Delays. 4. This parameter is guaranteed but not tested.
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IDT74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
V CC 500 VIN Pulse Generator RT D.U.T. 50pF CL 500 VOUT 6v Open GND
SWITCH POSITION
Test Open Drain Disable Low Enable Low Disable High Enable High All Other Tests Switch 6V GND Open
Test Circuits for All Outputs
DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC.
tSU
tH
tREM
3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
1.5V
1.5V
tSU
tH
Pulse Width
Set-Up, Hold, and Release Times
ENABLE CONTROL INPUT SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL 3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V tPZL OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH SWITCH 6V tPZH SWITCH GND 1.5V 0V 3V 1.5V tPHZ
DISABLE 3V 1.5V tPLZ 0V 3V 0.3V 0.3V VOL VOH 0V
Propagation Delay
Enable and Disable Times
NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. 2. Pulse Generator for All Pulses: Rate 1.0MHz; ZO 50; tF 2.5ns; tR 2.5ns. 3. If Vcc is below 3V, input voltage swings should be adjusted not to exceed Vcc.
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IDT74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT X XX FCT Temp. Range Family XX Device Type X Package
SO PY Q PG 245 245A 3 74
Small Outline IC Shrink Small Outline Package Quarter-size Small Outline Package Thin Shrink Small Outline Package Octal Bidirectional Transceiver 3.3Volt - 40C to +85C
CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054
for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com
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for Tech Support: logichelp@idt.com (408) 654-6459

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