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TC74AC245,640P/F/FT
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74AC245P,TC74AC245F,TC74AC245FT TC74AC640P,TC74AC640F,TC74AC640FT
Octal Bus Transceiver TC74AC245P/F/FT 3-State, Non-Inverting TC74AC640P/F/FT 3-State, Inverting
The TC74AC245, 640 are advanced high speed CMOS OCTAL BUS TRANSCEIVERs fabricated with silicon gate and double-layer metal wiring C2MOS technology. They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. They are 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 or transient excess voltage.
TC74AC245P, TC74AC640P
TC74AC245F, TC74AC640F
Features (Note 1)(Note 2)
* * * * High speed: tpd = 3.9 ns (typ.) at VCC = 5 V Low power dissipation: ICC = 8 A (max) at Ta = 25C High noise immunity: VNIH = VNIL = 28% VCC (min) Symmetrical output impedance: |IOH| = IOL = 24 mA (min) Capability of driving 50 transmission lines. Balanced propagation delays: tpLH tpHL - Wide operating voltage range: VCC (opr) = 2 V to 5.5 V Pin and function compatible with 74F245/640 Note 1: Do not apply a signal to any bus terminal when it is in the output mode. Damage may result.
TC74AC245FT, TC74AC640FT
* * *
Weight DIP20-P-300-2.54A SOP20-P-300-1.27A TSSOP20-P-0044-0.65A
: 1.30 g (typ.) : 0.22 g (typ.) : 0.08 g (typ.)
Note 2: All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull down resistors.
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TC74AC245,640P/F/FT
Pin Assignment
TC74AC245 DIR
A1 1 2 3 4 5 6 7 8 20 19 VCC
TC74AC640 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 11 (top view) VCC G B1 B2 B3 B4 B5 B6 B7 B8
G
B1 B2 B3 B4 B5 B6
A2 A3 A4
A5 A6 A7 A8
18 17
16 15 14 13 12 11
9
B7 B8
GND 10 (top view)
GND 10
IEC Logic Symbol
TC74AC245 G DIR (19) (1) G3 3 EN 1 [BA] 3 EN 2 [AB] 1 2 A2 A3 A4 A5 A6 A7 A8 (3) (4) (5) (6) (7) (8) (9) (17) (16) (15) (14) (13) (12) (11) B2 B3 B4 B5 B6 B7 B8 A2 A3 A4 A5 A6 A7 A8 (18) B1 G DIR (19) (1) TC74AC640 G3 3 EN 1 [BA] 3 EN 2 [AB] 1 2 (18) (17) (16) (15) (14) (13) (12) (11) B1 B2 B3 B4 B5 B6 B7 B8
A1
(2)
A1
(2) (3) (4) (5) (6) (7) (8) (9)
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TC74AC245,640P/F/FT
Truth Table
Inputs Function A Bus Output
Input Z
Outputs B Bus Input
Output
G
L
L H
DIR L
H X
AC245 A=B
B=A Z
AC640 A= B
B= A Z
X: Don't care Z: High impedance
Absolute Maximum Ratings (Note 1)
Characteristics Supply voltage range DC input voltage DC output voltage Input diode current Output diode current DC output current DC VCC/ground current Power dissipation Storage temperature Symbol VCC VIN VOUT IIK IOK IOUT ICC PD Tstg Rating -0.5 to 7.0 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 50 50 200 500 (DIP) (Note 2)/180 (SOP/TSSOP) -65 to 150 Unit V V V mA mA mA mA mW C
Note 1: 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). Note 2: 500 mW in the range of Ta = -40C to 65C. From Ta = 65C to 85C a derating factor of -10 mW/C should be applied up to 300 mW.
Operating Ranges (Note)
Characteristics Supply voltage Input voltage Output voltage Operating temperature Input rise and fall time Symbol VCC VIN VOUT Topr dt/dV Rating 2.0 to 5.5 0 to VCC 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 are required 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.
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TC74AC245,640P/F/FT
Electrical Characteristics
DC Characteristics
Test Condition Characteristics Symbol VCC (V) 2.0 High-level input voltage VIH 3.0 5.5 2.0 Low-level input voltage VIL 3.0 5.5 2.0 IOH = -50 A High-level output voltage VOH VIN = VIH or IOH = -4 mA VIL IOH = -24 mA IOH = -75 mA (Note) 3.0 4.5 3.0 4.5 5.5 2.0 IOL = 50 A Low-level output voltage VOL VIN = VIH or IOL = 12 mA VIL IOL = 24 mA IOL = 75 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 = VCC or GND VIN = VCC or GND (Note) 3.0 4.5 3.0 4.5 5.5 5.5 5.5 5.5 Min 1.50 2.10 3.85 1.9 2.9 4.4 2.58 3.94 Ta = 25C Typ. 2.0 3.0 4.5 0.0 0.0 0.0 Max 0.50 0.90 1.65 0.1 0.1 0.1 0.36 0.36 0.5 0.1 8.0 Ta = -40 to 85C Min 1.50 2.10 3.85 1.9 2.9 4.4 2.48 3.80 3.85 Max 0.50 0.90 1.65 0.1 0.1 0.1 0.44 0.44 1.65 5.0 1.0 80.0 A A A V V V V Unit
Note:
This spec indicates the capability of driving 50 transmission lines. One output should be tested at a time for a 10 ms maximum duration.
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TC74AC245,640P/F/FT
AC Characteristics (CL = 50 pF, RL = 500 , input: tr = tf = 3 ns)
Characteristics Symbol tpLH tpHL tpLH tpHL tpZL tpZH tpLZ tpHZ CIN CI/O CPD DIR, G An, Bn TC74AC245 Test Condition VCC (V) Propagation delay time (Note 2) Propagation delay time (Note 3) Output enable time 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5 3.3 0.3 5.0 0.5 Min Ta = 25C Typ. 7.0 5.0 6.4 4.8 9.3 7.1 7.1 5.9 5 13 38 36 Max 10.9 7.5 10.0 7.0 15.3 10.5 11.4 8.7 10 Ta = -40 to 85C Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max 12.4 8.5 11.4 8.0 17.4 12.0 13.0 10.0 10 ns Unit
ns
ns
Output disable time Input capacitance Bus input capacitance Power dissipation capacitance
ns pF pF pF
(Note 1) TC74AC640
Note 1: 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) Note 2: For TC74AC245 only Note 3: For TC74AC640 only
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TC74AC245,640P/F/FT
Package Dimensions
Weight: 1.30 g (typ.)
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TC74AC245,640P/F/FT
Package Dimensions
Weight: 0.22 g (typ.)
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TC74AC245,640P/F/FT
Package Dimensions
Weight: 0.08 g (typ.)
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TC74AC245,640P/F/FT
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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