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TC74VHC245F/FT/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC245F,TC74VHC245FT,TC74VHC245FK
Octal Bus Transceiver
The TC74VHC245 is an advanced high speed CMOS OCTAL BUS TRANSCEIVER fabricated with silicon gate C2MOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. It is intended for two-way asynchronous communication between data busses. The direction of data transmission is determined by the level of the DIR input. The enable input ( G ) can be used to disable the device so that the busses are effectively isolated. All inputs are equipped with protection circuits against static discharge.
TC74VHC245F
TC74VHC245FT
Features (Note 1) (Note 2) (Note 3)
* * * * * * * High speed: tpd = 4.0 ns (typ.) at VCC = 5 V Low power dissipation: ICC = 4 A (max) at Ta = 25C High noise immunity: VNIH = VNIL = 28% VCC (min) Balanced propagation delays: tpLH tpHL - Wide operating voltage range: VCC (opr) = 2 V to 5.5 V Low noise: VOLP = 1.2 V (max) Pin and function compatible with 74ALS245 Note 1: Do not apply a signal to any bus terminal when it is in the output mode. Damage may result. Note 2: All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull down resistors. Note 3: A parasitic diode is formed between the bus and VCC terminals. Therefore bus terminal can not be used to interface 5 V to 3 V systems directly.
TC74VHC245FK
Weight SOP20-P-300-1.27A TSSOP20-P-0044-0.65A VSSOP20-P-0030-0.50
: 0.22 g (typ.) : 0.08 g (typ.) : 0.03 g (typ.)
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Pin Assignment IEC Logic Symbol
G DIR (19) (1) G3 3 EN 1 [BA] 3 EN 2 [AB] 1 2 A2 A3 A4 A5 A6 GND 10 (top view) A8 11 B8 A7 (3) (4) (5) (6) (7) (8) (9) (17) (16) (15) (14) (13) (12) (11) B2 B3 B4 B5 B6 B7 B8 (18) B1
DIR A1 A2 A3 A4 A5 A6 A7 A8
1 2 3 4 5 6 7 8 9
20 19 18 17 16 15 14 13 12
VCC
G
B1 B2 B3 B4 B5 B6 B7 A1 (2)
Truth Table
Inputs Function
G L L H
DIR L H X
A Bus Output Input Z
B Bus Input Output
Output A=B B=A Z
X: Don't care Z: High impedance
Absolute Maximum Ratings (Note)
Characteristics Supply voltage range DC input voltage (DIR, G ) DC bus I/O voltage Input diode current Output diode current DC output current DC VCC/ground current Power dissipation Storage temperature Symbol VCC VIN VI/O IIK IOK IOUT ICC PD Tstg Rating -0.5 to 7.0 -0.5 to 7.0 -0.5 to VCC + 0.5 -20 20 25 75 180 -65 to 150 Unit V V V mA mA mA mA mW C
Note:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook ("Handling Precautions"/"Derating Concept and Methods") and individual reliability data (i.e. reliability test report and estimated failure rate, etc).
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Operating Ranges (Note)
Characteristics Supply voltage Input voltage (DIR, G ) Bus I/O voltage Operating temperature Input rise and fall time Symbol VCC VIN VI/O Topr dt/dv Rating 2.0 to 5.5 0 to 5.5 0 to VCC -40 to 85 0 to 100 (VCC = 3.3 0.3 V) 0 to 20 (VCC = 5 0.5 V) Unit V V V C ns/V
Note:
The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs and bus inputs must be tied to either VCC or GND. Please connect both bus inputs and the bus outputs with VCC or GND when the I/O of the bus terminal changes by the function. In this case, please note that the output is not short-circuited.
Electrical Characteristics
DC Characteristics
Test Condition Characteristics Symbol VCC (V) 2.0 High-level input voltage VIH 3.0 to 5.5 2.0 Low-level input voltage VIL 3.0 to 5.5 2.0 High-level output voltage VIN = VIH or VIL IOH = -50 A 3.0 4.5 IOH = -4 mA IOH = -8 mA 3.0 4.5 2.0 Low-level output voltage VIN = VIH or VIL IOL = 50 A 3.0 4.5 IOL = 4 mA IOL = 8 mA 3-state output off-state current Input leakage current Quiescent supply current IOZ IIN ICC VIN = VIH or VIL VOUT = VCC or GND VIN = 5.5 V or GND VIN = VCC or GND 3.0 4.5 5.5 0 to 5.5 5.5 1.9 2.9 4.4 2.58 3.94 2.0 3.0 4.5 0.0 0.0 0.0 Min 1.50 VCC x 0.7 Ta = 25C Typ. Max Ta = -40 to 85C Min 1.50 VCC x 0.7 Max Unit
V
0.50 VCC x 0.3 0.1 0.1 0.1 0.36 0.36 0.25 0.1 4.0
1.9 2.9 4.4 2.48 3.80
0.50 VCC x 0.3 0.1 0.1 0.1 0.44 0.44 2.50 1.0 40.0 A A A V V V
VOH
VOL
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AC Characteristics (input: tr = tf = 3 ns)
Characteristics Symbol Test Condition VCC (V) 3.3 0.3 5.0 0.5 CL (pF) 15 50 15 50 15 50 15 50 50 50 50 50 Min (Note 2) Ta = 25C Typ. 5.8 8.3 4.0 5.5 8.5 11.0 5.8 7.3 11.5 7.0 4 8 21 Max 8.4 11.9 5.5 7.5 13.2 16.7 8.5 10.6 15.8 9.7 1.5 1.0 10 Ta = -40 to 85C Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 10.0 13.5 6.5 8.5 15.5 19.0 10.0 12.0 18.0 11.0 1.5 1.0 10 ns ns ns Unit
Propagation delay time
tpLH tpHL
3-state output enable time
tpZL tpZH
3.3 0.3 RL = 1 k 5.0 0.5 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5
3-state output disable time Output to output skew Input capacitance Bus input capacitance Power dissipation capacitance
tpLZ tpHZ tosLH tosHL CIN CI/O CPD
RL = 1 k
(Note 1) DIR, G An, Bn
ns pF pF pF
Note 1: Parameter guaranteed by design. tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn| Note 2: 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) = CPD*VCC*fIN + ICC/8 (per bit)
Noise Characteristics (input: tr = tf = 3 ns) (Note)
Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Minimum high level dynamic input voltage Maximum low level dynamic input voltage Symbol Test Condition VCC (V) CL = 50 pF 5.0 Ta = 25C Typ. 0.7 (0.9) -0.7 (-0.9) Max 1.0 (1.2) -1.0 (-1.2) 3.5 1.5 Unit
VOLP
V
VOLV VIHD VILD
CL = 50 pF CL = 50 pF CL = 50 pF
5.0 5.0 5.0
V V V
Note:
The value in ( ) only applies to JEDEC SOP (FW) devices.
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Input Equivalent Circuit
DIR, G
Bus Terminal Equivalent Circuit
An, Bn
INPUT
I/O
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TC74VHC245F/FT/FK
Package Dimensions
Weight: 0.22 g (typ.)
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TC74VHC245F/FT/FK
Package Dimensions
Weight: 0.08 g (typ.)
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TC74VHC245F/FT/FK
Package Dimensions
Weight: 0.03 g (typ.)
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TC74VHC245F/FT/FK
RESTRICTIONS ON PRODUCT USE
* The information contained herein is subject to change without notice.
20070701-EN
* 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 his document shall be made at the customer's own risk. * The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. * Please contact your sales representative for product-by-product details in this document regarding RoHS compatibility. Please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations.
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