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TC74LCX16244FT
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74LCX16244FT
Low-Voltage 16-Bit Bus Buffer with 5-V Tolerant Inputs and Outputs
The TC74LCX16244FT is a high-performance CMOS 16-bit bus buffer. Designed for use in 2.5-V or 3.3-V systems, it achieves high-speed operation while maintaining the CMOS low power dissipation. The device is designed for low-voltage (2.5-V or 3.3-V) VCC applications, but it could be used to interface to 5 V supply environment for both inputs and outputs. This device is non-inverting 3-state buffer having four active-low output enables. It can be used as four 4-bit buffers two 8-bit buffers or one 16-bit buffer. When the OE input is high, Weight: 0.25 g (typ.) the outputs are in a high-impedance state. This device is designed to be used with 3-state memory address drivers, etc. All inputs are equipped with protection circuits against static discharge.
Features
* * * * * * Low-voltage operation: VCC = 2.0 to 3.6 V High-speed operation: tpd = 4.5 ns (max) (VCC = 3.0 to 3.6 V) Output current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V) Latch-up performance: -500 mA Package: TSSOP Power-down protection provided on all inputs and outputs
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Pin Assignment (top view) IEC Logic Symbol
1 48 25 24 47 46 44 43 41 40 38 37 36 35 33 32 30 29 27 26 1 4 1 3 1 2
1OE 1Y1 1Y2 GND 1Y3 1Y4 VCC 2Y1 2Y2
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
2OE
1A1 1A2 GND 1A3 1A4 VCC 2A1 2A2 GND 2A3 2A4 3A1 3A2 GND 3A3 3A4 VCC 4A1 4A2 GND 4A3 4A4
1OE 2OE 3OE 4OE
EN1 EN2 EN3 EN4 1 1 2 3 5 6 8 9 11 12 13 14 16 17 19 20 22 23 1Y1 1Y2 1Y3 1Y4 2Y1 2Y2 2Y3 2Y4 3Y1 3Y2 3Y3 3Y4 4Y1 4Y2 4Y3 4Y4
1A1 1A2 1A3 1A4 2A1 2A2 2A3 2A4 3A1 3A2 3A3 3A4 4A1 4A2 4A3 4A4
GND 10 2Y3 11 2Y4 12 3Y1 13 3Y2 14 GND 15 3Y3 16 3Y4 17 VCC 18 4Y1 19 4Y2 20 GND 21 4Y3 22 4Y4 23 4OE 24
3OE
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Truth Table
Inputs Outputs 1Y1-1Y4 L H Z 1A1-1A4 2A1-2A4 1Y1-1Y4 2Y1-2Y4 3Y1-3Y4 4Y1-4Y4 3A1-3A4 4A1-4A4 1/4 1OE 3OE
System Diagram
1A1-1A4 L H X
1OE
L L H
2OE
4OE
Inputs 2OE L L H 2A1-2A4 L H X
Outputs 2Y1-2Y4 L H Z
Inputs
Outputs 3Y1-3Y4 L H Z
3OE
L L H
3A1-3A4 L H X
Inputs 4OE L L H 4A1-4A4 L H X
Outputs 4Y1-4Y4 L H Z
X: Don't care Z: High impedance
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Absolute Maximum Ratings (Note 1)
Characteristics Power supply voltage Input voltage Output voltage Input diode current Output diode current DC output current Power dissipation DC VCC/ground current per supply pin Storage temperature Symbol VCC VIN VOUT IIK IOK IOUT PD ICC/IGND Tstg Rating -0.5 to 6.0 -0.5 to 7.0 -0.5 to 7.0 (Note 2) -0.5 to VCC + 0.5 (Note 3) -50 50 50 400 100 -65 to 150 (Note 4) Unit V V V mA mA mA mW mA 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 Power supply voltage Input voltage Output voltage Symbol VCC VIN VOUT Rating 2.0 to 3.6 1.5 to 3.6 (Note 2) 0 to 5.5 0 to 5.5 (Note 3) 0 to VCC (Note 4) 24 Output current IOH/IOL Topr dt/dv 12 8 Operating temperature Input rise and fall time -40 to 85 0 to 10 (Note 8) (Note 5) (Note 6) (Note 7) C ns/V mA Unit V V V
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: Data retention only Note 3: Output in OFF state Note 4: High or low state Note 5: VCC = 3.0 to 3.6 V Note 6: VCC = 2.7 to 3.0 V Note 7: VCC = 2.3 to 2.7 V Note 8: VIN = 0.8 to 2.0 V, VCC = 3.0 V
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Electrical Characteristics DC Characteristics (Ta = -40 to 85C)
Characteristics Symbol Test Condition VCC (V) 2.3 to 2.7 2.7 to 3.6 2.3 to 2.7 2.7 to 3.6 IOH = -100 A IOH = -8 mA IOH = -12 mA IOH = -18 mA Output voltage IOH = -24 mA IOL = 100 A IOL = 8 mA L-level VOL VIN = VIH or VIL IOL = 12 mA IOL = 16 mA IOL = 24 mA Input leakage current 3-state output off-state current Power off leakage current Quiescent supply current Increase in Icc per input IIN IOZ IOFF ICC ICC VIN = 0 to 5.5 V VIN = VIH or VIL VOUT = 0 to 5.5 V VIN/VOUT = 5.5 V VIN = VCC or GND VIN/VOUT = 3.6 to 5.5 V VIH = VCC - 0.6 V 2.3 to 3.6 2.3 2.7 3.0 3.0 2.3 to 3.6 2.3 2.7 3.0 3.0 2.3 to 3.6 2.3 to 3.6 0 2.3 to 3.6 2.3 to 3.6 2.3 to 3.6 Min 1.7 2.0 VCC -0.2 1.8 2.2 2.4 2.2 Max 0.7 0.8 0.2 0.6 0.4 0.4 0.55 5.0 5.0 10.0 20.0 20.0 500 A A A A V V Unit
H-level Input voltage L-level
VIH
VIL
H-level
VOH
VIN = VIH or VIL
AC Characteristics (Ta = -40 to 85C)
Characteristics Symbol tpLH Propagation delay time tpHL Figure 1, Figure 2 Test Condition VCC (V) 2.5 0.2 2.7 3.3 0.3 2.5 0.2 Figure 1, Figure 3 2.7 3.3 0.3 2.5 0.2 Figure 1, Figure 3 2.7 3.3 0.3 2.5 0.2 (Note) 2.7 3.3 0.3 CL(pF) 30 50 50 30 50 50 30 50 50 30 50 50 Min 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Max 5.4 5.2 4.5 7.2 6.3 5.5 6.5 5.7 5.4 1.0 ns ns ns ns Unit
3-state output enable time
tpZL tpZH tpLZ tpHZ tosLH tosHL
3-state output disable time
Output to output skew
Note:
Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|)
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Dynamic Switching Characteristics
(Ta = 25C, input: tr = tf = 2.5 ns, RL = 500 )
Characteristics Quiet output maximum dynamic Quiet output minimum dynamic Symbol Test Condition VCC (V) VIH = 2.5 V, VIL = 0 V, CL =30pF VIH = 3.3 V, VIL = 0 V, CL =50pF VIH = 2.5 V, VIL = 0 V, CL =30pF VIH = 3.3 V, VIL = 0 V, CL =50pF 2.5 3.3 2.5 3.3 Typ. 0.6 0.8 0.6 0.8 Unit
VOL
VOLP
V
VOL
|VOLV|
V
Capacitive Characteristics (Ta = 25C)
Characteristics Input capacitance Output capacitance Power dissipation capacitance Symbol CIN COUT CPD fIN = 10 MHz Test Condition VCC (V) (Note) 3.3 3.3 3.3 Typ. 7 8 25 Unit pF pF pF
Note:
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)
AC Test Circuit
Switch RL 6.0 V or VCC x 2 Open GND Measure CL RL Parameter tpLH, tpHL tpLZ, tpZL tpHZ, tpZH RL = 500 6.0 V VCC x 2 Switch Open @VCC = 3.3 0.3 V @VCC = 2.5 0.2 V GND
Output
Figure 1
AC Waveform
tr 2.5 ns Input (A) tf 2.5 ns 90% VM 10% VIH GND VOH VM tpLH tpHL VOL
Output (Y)
Figure 2 tpLH, tpHL 6 2007-10-19
TC74LCX16244FT
tr 2.5 ns Output Enable ( OE ) tpLZ Output (Y) Low to Off to Low tpHZ Output (Y) High to Off to High Outputs enabled tf 2.5 ns 90% VM 10% tpZL 3.0 V or Vcc VM VX tpZH VOL VOH VM GND Outputs disabled Outputs enabled VIH GND
VY
Figure 3 tpLZ, tpHZ, tpZL, tpZH
Symbol VIH VM VX VY VCC 3.3 0.3 V 2.7 V 1.5 V VOL + 0.3 V VOH - 0.3 V 2.7 V 2.7 V 1.5 V VOL + 0.3 V VOH - 0.3 V 2.5 0.2 V VCC VCC/2 VOL + 0.15 V VOH - 0.15 V
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Package Dimensions
Weight: 0.25 g (typ.)
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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.
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