TC74VHCT540,541AF/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHCT540AF,TC74VHCT540AFT,TC74VHCT540AFK TC74VHCT541AF,TC74VHCT541AFT,TC74VHCT541AFK
Octal Bus Buffer
TC74VHCT540AF/AFT/AFK Inverted, 3-State Outputs TC74VHCT541AF/AFT/AFK Non-Inverted, 3-State Outputs
The TC74VHCT540A and 541A are advanced high speed CMOS OCTAL BUS BUFFERs fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation.
The TC74VHCT540A is an inverting type and, the TC74VHCT541A is a non-inverting type.
When either G1 or G2 are high, the terminal outputs are in the high-impedance state.
The input voltage are compatible with TTL output voltage. These devices may be used as a level converter for interfacing 3.3 V to 5 V system.
Input protection and output circuit ensure that 0 to 5.5 V can be applied to the input and output (Note) pins without regard to the supply voltage. These structure prevents device destruction due to mismatched supply and input/output voltages such as battery back up, hot board insertion, etc.
Note:
Output in off-state
TC74VHCT540AF, TC74VHCT541AF
TC74VHCT540AFT, TC74VHCT541AFT
TC74VHCT540AFK, TC74VHCT541AFK
Features
• High speed: tpd = 5.4 ns (typ.) at VCC = 5 V
• Low power dissipation: ICC = 4 μA (max) at Ta = 25°C • Compatible with TTL outputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
• Power down protection is provided on all inputs and outputs
∼ tpHL • Balanced propagation delays: tpLH− • Low noise: VOLP = 1.6 V (max)
• Pin and function compatible with the 74 series
(74AC/HC/F/ALS/LS etc.) 540/541 type.
Weight
SOP20-P-300-1.27A : 0.22 g (typ.) TSSOP20-P-0044-0.65A : 0.08 g (typ.) VSSOP20-P-0030-0.50 : 0.03 g (typ.)
12007-10-01
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TC74VHCT540,541AF/AFT/AFK Pin Assignment
TC74VHCT540A G1 A1 A2 A3 A4 A5 A6 A7 A8
1 2 3 4 5 6 7 8 9 20 1918 17
TC74VHCT541A VCC
G2Y1Y2Y3Y4Y5Y6Y7Y8
G1A1A2A3A4A5A6A7A8
123456789
20 19 18 17 16 15 14 13 12 11
(top view)
VCCG2Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8
16
15 14 13 12 11
(top view)
GND 10 GND10
IEC Logic Symbol
TC74VHCT540A
G1G2A1A2A3A4A5A6A7A8
(1) (19) (2) (3) (4) (5) (6) (7) (8) (9)
&
EN
G1G2
(18) (17) (16) (15) (14) (13) (12) (11)
Y1Y2Y3Y4Y5Y6Y7Y8
A1A2A3A4A5A6A7A8
(1)(19)(2)(3)(4)(5)(6)(7)(8)(9)
TC74VHCT541A &
EN
(18) (17) (16) (15) (14) (13) (12) (11)
Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8
Truth Table
Inputs Outputs G1 G2 An Yn Yn H X X Z Z X H X Z Z L L H H L L L L L H X: Don’t care Z: High impedance Yn: VHCT541A Yn: VHCT540A
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TC74VHCT540,541AF/AFT/AFK Absolute Maximum Ratings (Note 1)
Characteristics Symbol 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
VCC VIN VOUT IIK IOK IOUT ICC
Rating −0.5 to 7.0 −0.5 to 7.0 −0.5 to 7.0 −0.5 to VCC + 0.5
Unit V V
(Note 2)(Note 3)
V
−20 mA ±20 (Note 4)mA ±25 mA ±75 mA PD 180 mW Tstg
−65 to 150
°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: Output in off-state
Note 3: High or low state. IOUT absolute maximum rating must be observed.
Note 4: VOUT < GND, VOUT > VCC
Operating Ranges (Note 1)
Characteristics Symbol Supply voltage Input voltage Output voltage Operating temperature Input rise and fall time
VCC VIN VOUT Topr dt/dV
Rating 4.5 to 5.5 0 to 5.5 0 to 5.5
(Note 2)
Unit V V
V
0 to VCC (Note 3)−40 to 85
°C ns/V
0 to 20
Note 1: The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either VCC or GND. Note 2: Output in off-state Note 3: High or low state
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TC74VHCT540,541AF/AFT/AFK Electrical Characteristics
DC Characteristics
Characteristics Symbol High-level input voltage Low-level input voltage
High-level output voltage
Low-level output voltage 3-state output off-state current Input leakage current
Quiescent supply current Output leakage current
Test Condition
Ta = 25°C
VCC (V)4.5 to 5.5 4.5 to 5.5
Min2.0 ―
Typ.―
Ta = −40 to 85°C
Max Min MaxUnit
VIH VIL VOH
― ―
― 2.0 ― V ― 0.8 ― 0.8 V 4.50―
― 4.40 ― ― 3.80 ―
V
IOH = −50 μA 4.5 4.40VIN
= VIH or VILI = −8 mA 4.5 3.94OH
VOL
IOL = 50 μA 4.5 ― 0.0 0.10 ― 0.10VIN
= VIH or VILI = 8 mA 4.5 ― ― 0.36 ― 0.44OLVIN = VIH or VIL VOUT = VCC or GND VIN = 5.5 V or GND VIN = VCC or GND Per input: VIN = 3.4 V Other input: VCC or GND VOUT = 5.5 V
5.5 0 to 5.55.5 5.5 0
― ― ― ― ―
― ±0.25 ― ±2.50― ±0.1 ― ±1.0― 4.0 ― 40.0― 1.35 ― 1.50― +0.5 ― +5.0V
IOZ IIN ICC ICCT IOPD
μA μA μA mAμA
AC Characteristics (input: tr = tf = 3 ns)
Characteristics Symbol Test Condition
Ta = 25°C
CL (pF)15
―
5.0 ± 0.5
50 15
―
5.0 ± 0.5
50
RL = 1 kΩ
5.0 ± 0.5
15 50 50
― 5.5 7.9 1.0 9.0 ― 8.3 11.3 1.0 13.0― 8.8 12.3 1.0 14.0― 9.4 11.9 1.0 13.5ns
― 5.9 8.4 1.0 9.5 ― 5.0 6.9 1.0 8.0 ns
Min
Typ.
Ta =
−40 to 85°C
Max Min Maxns Unit
Propagation delay time
(TC74VHCT540A) Propagation delay time
(TC74VHCT541A) 3-state output enable time
3-state output disable time
Output to output skew Input capacitance Output capacitance Power dissipation capacitance
tpLH tpHL tpLH tpHL tpZL tpZH tpLZ tpHZ tosLH tosHL CIN COUT
VCC (V)
― 5.4 7.4 1.0 8.5 RL = 1 kΩ
5.0 ± 0.5ns (Note 1)5.0 ± 0.5― ―
50 ― ― 1.0 ― 1.0 ns ― 4 10 ― 10 pF ― 9 ―
―
― pF ― pF CPD (Note 2)― 19 ― ―
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)
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TC74VHCT540,541AF/AFT/AFK Noise Characteristics (input: tr = tf = 3 ns)
Characteristics Symbol Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Minimum high level dynamic input voltage
Maximum low level dynamic input voltage
VOLP VOLV VIHD VILD
CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF
Test Condition
Ta = 25°C
VCC (V) 5.0 5.0 5.0 5.0
Typ. Limit1.1 −1.1
1.5 −1.5
UnitV V
― 2.0 V ― 0.8 V
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TC74VHCT540,541AF/AFT/AFK Package Dimensions
Weight: 0.22 g (typ.)
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TC74VHCT540,541AF/AFT/AFK Package Dimensions
Weight: 0.08 g (typ.)
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TC74VHCT540,541AF/AFT/AFK Package Dimensions
Weight: 0.03 g (typ.)
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TC74VHCT540,541AF/AFT/AFK
RESTRICTIONS ON PRODUCT USE
• The information contained herein is subject to change without notice.
20070701-EN GENERAL
• 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. • The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patents or other rights of TOSHIBA or the third parties. • 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.
92007-10-01
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