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TC74LCX164245FT
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74LCX164245FT
16-Bit Dual Supply Bus Transceiver
The TC74LCX164245FT is a dual supply, advanced high-speed CMOS 16-bit dual supply voltage interface bus transceiver fabricated with silicon gate CMOS technology. Designed for use as an interface between a 5-V bus and a 3.3-V or 2.5-V bus in mixed 5-V/3.3-V or 2.5-V supply systems, it achieves high-speed operation while maintaining the CMOS low power dissipation. It is intended for 2 way asynchronous communication between data busses. The direction of data transmission is determined by the level of the DIR input. The enable input (OE) can be used to disable the device so that the buses are effectively isolated. The B-port interfaces with the 5-V bus, the A-port with the 3.3-V or Weight: 0.25 g (typ.) 2.5-V bus. All inputs are equipped with protection circuits against static discharge or transient excess voltage.
Features
* * * * Bidirectional interface between 5-V and 3.3-V or 2.5-V buses High-speed: tpd = 5.8 ns (max) (VCCB = 5.0 0.5 V/VCCA = 3.3 0.3 V, Ta = -40 to 85C) Low power dissipation: ICC = 80 A (max) (Ta = -40 to 85C) Symmetrical ouput impedance: IOUTA = 24 mA (min) IOUTB = 24 mA (min) (VCCA = 3.0 V/VCCB = 4.5 V) * * * * Power-down protection provided on all inputs and outputs Allows A port and VCCA to float simultaneously when OE is "H". Latch-up performance: 500 mA Package: TSSOP (thin shrink small outline package)
Note 1: Do not apply a signal to any bus pins when it is in the output mode. Damage may result. All floating (high impedance) bus pins must have their input fixed by means of pull-up or pull-down resistors.
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TC74LCX164245FT
Pin Assignment (top view) IEC Logic Symbol
48 1 25 24
1DIR 1B1 1B2 GND 1B3 1B4 (5 V) VCCB 1B5 1B6
1 2 3 4 5 6 7 8 9
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
1OE
1OE
1DIR 1A1 1A2 GND 1A3 1A4 VCCA (3.3 V) 1A5 1A6 GND 1A7 1A8 2A1 2A2 GND 2A3 2A4 VCCA (3.3 V) 2A5 2A6 GND 2A7 2A8
2OE 2OE
2DIR
G3 3 EN1 (BA) 3 EN2 (AB) G6 6 EN4 (BA) 6 EN5 (AB) 1 2 2 3 5 6 8 9 11 12 13 14 16 17 19 20 22 23 1B1 1B2 1B3 1B4 1B5 1B6 1B7 1B8 2B1 2B2 2B3 2B4 2B5 2B6 2B7 2B8
1A1 1A2 1A3 1A4 1A5 1A6 1A7 1A8 2A1 2A2 2A3 2A4 2A5 2A6 2A7 2A8
47 46 44 43 41 40 38 37 36 35 33 32 30 29 27 26
GND 10 1B7 11 1B8 12 2B1 13 2B2 14 GND 15 2B3 16 2B4 17 (5 V) VCCB 18 2B5 19 2B6 20 GND 21 2B7 22 2B8 23 2DIR 24
4 5
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TC74LCX164245FT
Truth Table
Inputs
1OE
Function 1DIR L H X Bus 1A1-1A8 Output Input Z Bus 1B1-1B8 Input Output Outputs
L L H
A=B B=A Z
Inputs
2OE
Function 2DIR L H X Bus 2A1-2A8 Output Input Z Bus 2B1-2B8 Input Output Outputs
L L H
A=B B=A Z
X: Don't care Z: High impedance
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TC74LCX164245FT
Block Diagram
VCCB VCCA
1DIR
1OE
Logic level converter
1B1
1A1
1B8
Same as above block
1A8
VCCB
VCCA
2DIR
2OE
Logic level converter
2B1
2A1
2B8
Same as above block
2A8
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TC74LCX164245FT
Maximum Ratings
Characteristics Power supply voltage DC input voltage (DIR, OE ) VIN (Note 2) Symbol VCCB VCCA Rating -0.5 to 7.0 -0.5 to VCCB + 0.5 -0.5 to 7.0 -0.5 to 7.0 (Note 3) VI/OB DC bus I/O voltage VI/OA -0.5 to VCCB + 0.5 (Note 4) -0.5 to 7.0 (Note 3) -0.5 to VCCA + 0.5 (Note 4) Input diode current Output diode current DC output current IIK II/OK IOUTB IOUTA DC VCC/ground current per supply pin Power dissipation Storage temperature ICCB ICCA PD Tstg -50 50 50 50 100 100 400 -65 to 150 (Note 5) mA mA mA V Unit V
V
mA mW C
Note 2: VCCB > VCCA Don't supply a voltage to VCCA terminal when VCCB is in the off-state. Note 3: OFF state Note 4: High or low state. IOUT absolute maximum rating must be observed. Note 5: VOUT < GND, VOUT > VCC
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Recommended Operating Range
Characteristics Power supply voltage Input voltage (DIR, OE ) VIN 0 to 5.5 0 to 5.5 VI/OB Bus I/O voltage VI/OA (Note 6) V V Symbol VCCB VCCA Rating 4.5 to 5.5 2.3 to 3.6 Unit V
0 to VCCB (Note 7) 0 to 5.5 (Note 6)
0 to VCCA (Note 7) 24 24 8 (Note 8) (Note 9) (Note 10) C ns/V mA
Output current
IOUTB IOUTA
Operating temperature Input rise and fall time
Topr dt/dv
-40 to 85 0 to 10 (Note 11)
Note 6: OFF state Note 7: High or low state Note 8: VCCB = 4.5 to 5.5 V Note 9: VCCA = 3.0 to 3.6 V Note 10: VCCA = 2.3 to 2.7 V Note 11: VINB = 0.8 to 2.0 V, VCCB = 5.0 V VINA = 0.8 to 2.0 V, VCCA = 3.0 V
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TC74LCX164245FT
Electrical Characteristics DC Characteristics
Characteristics Symbol Test Condition VCCB (V) VCCA (V) 5.0 0.5 2.3 to 3.6 5.0 0.5 5.0 0.5 2.5 0.2 3.3 0.3 Ta = -40 to 85C Min VIHB H-level input voltage VIHA VILB L-level input voltage VILA An IOHB = -100 mA VINA = VIHA or VILA VOHA VINB = VIHB or VILB IOHB = -24 mA IOHA = -100 mA IOHA = -24 mA IOHA = - 8 mA VOLB L-level output voltage VOLA IOLB = 100 mA VINA = VIHA or VILA VINB = VIHB or VILB IOLB = 24 mA IOLA = 100 mA IOLA = 24 mA IOLA = 8 mA IOZB 3-state output OFF state current IOZA Input leakage current Power-off leakage current IIN IOFF VIN = VIHB or VILB VI/OB = 0 to 5.5 V VIN = VIHB or VILB VI/OA = 0 to 5.5 V VIN (DIR, OE ) = 0 to 5.5 V VINA/VINB = 5.5 V VI/OA = Open, VCCA = Open ICCB1 VINB = VCCB or GND
OE = VCCB, DIR = GND
Unit
Max 3/4 3/4 3/4 0.8 0.7 0.8 3/4 3/4 3/4 3/4 3/4 0.2 0.44 0.2 0.55 0.6 5.0 mA V V V V
DIR, OE , Bn An DIR, OE , Bn
2.0 1.7 2.0 3/4 3/4 3/4 VCCB - 0.2 3.7 VCCA - 0.2 2.2 1.8 3/4 3/4 3/4 3/4 3/4 3/4
5.0 0.5 2.3 to 3.6 5.0 0.5 5.0 0.5 2.5 0.2 3.3 0.3
VOHB H-level output voltage
5.0 0.5 2.3 to 3.6 4.5 2.3 to 3.6
5.0 0.5 2.3 to 3.6 5.0 0.5 5.0 0.5 3.0 2.3
5.0 0.5 2.3 to 3.6 4.5 2.3 to 3.6
5.0 0.5 2.3 to 3.6 5.0 0.5 5.0 0.5 3.0 2.3
5.0 0.5 2.3 to 3.6
5.0 0.5 2.3 to 3.6 5.5 0 3.6 0
3/4 3/4 3/4
5.0 5.0 10 mA mA
5.5
Open
3/4
80
Quiescent supply current
ICCB2
VINA = VCCA or GND VINB = VCCB or GND VINA = VCCA or GND VINB = VCCB or GND VINB = 3.4 V per input VINA = VCCA - 0.6 V per input
5.5
3.6
3/4
80
mA
ICCA ICCTB ICCTA
5.5 5.5 5.0 0.5
3.6 2.3 to 3.6 3.6
3/4 3/4 3/4
50 2.0 500 mA mA
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AC Characteristics (input: tr = tf = 2.5 ns, RL = 500 W) VCCA = 3.3 0.3 V
Characteristics Symbol Test Condition CL (pF) VCCB (V) Ta = -40 to 85C Min Propagation delay time (Bn (R) An) 3-state output enable time ( OE (R) An) 3-state output disable time ( OE (R) An) Propagation delay time (An (R) Bn) 3-state output enable time ( OE (R) Bn) 3-state output disable time ( OE (R) Bn) Output to output skew tpLH tpHL Input: Bn tpZL tpZH tpLZ tpHZ tpLH tpHL Input: An tpZL tpZH tpLZ tpHZ tosLH tosHL (Note 12) 50 Output: Bn (DIR = "H") 50 5.0 0.5 1.0 9.0 50 5.0 0.5 1.0 8.9 ns 50 Output: An (DIR = "L") 50 5.0 0.5 1.0 9.0 50 5.0 0.5 1.0 9.0 ns 50 5.0 0.5 1.0 Max 5.8 Unit
5.0 0.5
1.0
5.8
5.0 0.5
3/4
1.0
ns
Note 12: Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|)
VCCA = 2.5 0.2 V
Characteristics Symbol Test Condition CL (pF) VCCB (V) Ta = -40 to 85C Min Propagation delay time (Bn (R) An) 3-state output enable time ( OE (R) An) 3-state output disable time ( OE (R) An) Propagation delay time (An (R) Bn) 3-state output enable time ( OE (R) Bn) 3-state output disable time ( OE (R) Bn) Output to output skew tpLH tpHL Input: Bn tpZL tpZH tpLZ tpHZ tpLH tpHL Input: An tpZL tpZH tpLZ tpHZ tosLH tosHL (Note 12) 30 or 50 Output: Bn (DIR = "H") 50 5.0 0.5 1.0 10.3 50 5.0 0.5 1.0 10.5 ns 50 Output: An (DIR = "L") 30 5.0 0.5 1.0 10.0 30 5.0 0.5 1.0 11.0 ns 30 5.0 0.5 1.0 Max 8.4 Unit
5.0 0.5
1.0
9.0
5.0 0.5
3/4
1.0
ns
Note 12: Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|)
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TC74LCX164245FT
Capacitive Characteristics (Ta = 25C) VCCB = 5.0 V
Characteristics Input capacitance Output capacitance Symbol CIN CI/O CPDA Test Circuit 3/4 3/4 3/4 DIR, OE An, Bn A B (DIR = "H") B A (DIR = "L") A B (DIR = "H") B A (DIR = "L") Test Condition VCCA (V) 2.5, 3.3 2.5, 3.3 2.5, 3.3 2.5, 3.3 2.5, 3.3 2.5, 3.3 Typ. 7 8 2 26 pF 36 4 Unit pF pF
Power dissipation capacitance (Note 13)
CPDB
3/4
Note 13: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (opr) = CPDVCCfIN + ICC/16 (per bit)
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TC74LCX164245FT
Package Dimensions
Weight: 0.25 g (typ.)
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TC74LCX164245FT
RESTRICTIONS ON PRODUCT USE
000707EBA
* TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc.. * The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's own risk. * The products described in this document are subject to the foreign exchange and foreign trade laws. * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. * The information contained herein is subject to change without notice.
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