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TC74VHC125,126F/FN/FT/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC125F,TC74VHC125FN,TC74VHC125FT,TC74VHC125FK TC74VHC126F,TC74VHC126FN,TC74VHC126FT,TC74VHC126FK
TC74VHC125F/FN/FT/FK Quad Bus Buffer TC74VHC126F/FN/FT/FK Quad Bus Buffer
The TC74VHC125/126 are high speed CMOS QUAD BUS BUFFERs fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent Bipolar Shottky TTL while maintaining the CMOS low power dissipation. The TC74VHC125 requires the 3-state control input G to be set high to place the output into the high impedance state, whereas the TC74VHC126 requires the control input G to be set low to place the output into high impedance. An input protection circuit ensures that 0 to 5.5 V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages.
Note: xxxFN (JEDEC SOP) is not available in Japan. TC74VHC125F, TC74VHC126F
TC74VHC125FN, TC74VHC126FN
Features
* * * * * * * * High speed: tpd = 3.8 ns (typ.) at VCC = 5 V Low power dissipation: ICC = 4 A (max) at Ta = 25C High noise immunity: VNIH = VNIL = 28% VCC (min) Power down protection is provided on all inputs. Balanced propagation delays: tpLH tpHL - Wide operating voltage range: VCC (opr) = 2 to 5.5 V Low noise: VOLP = 0.8 V (max) Pin and function compatible with 74ALS125/126
TC74VHC125FK, TC74VHC126FK TC74VHC125FT, TC74VHC126FT
Weight SOP14-P-300-1.27A SOL14-P-150-1.27 TSSOP14-P-0044-0.65A VSSOP14-P-0030-0.50
: 0.18 g (typ.) : 0.12 g (typ.) : 0.06 g (typ.) : 0.02 g (typ.)
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TC74VHC125,126F/FN/FT/FK
Pin Assignment
TC74VHC125 1G 1A 1Y
2G
TC74VHC126
14 13 12 11 10 9 8 VCC
1 2 3 4 5 6 7 (top view)
1G 1A 1Y 2G 2A 2Y GND
1 2 3 4 5 6 7 (top view)
14 13 12 11 10 9 8
VCC 4G 4A 4Y 3G 3A 3Y
4G
4A 4Y
3G
2A 2Y GND
3A 3Y
IEC Logic Symbol
TC74VHC125 1G 1A 2G 2A 3G 3A 4G 4A (1) (2) (4) (5) (10) (9) (13) (12) EN (3) (6) (8) (11) 1Y 2Y 3Y 4Y 1G 1A 2G 2A 3G 3A 4G 4A (1) (2) (4) (5) (10) (9) (13) (12) TC74VHC126 EN (3) (6) (8) (11) 1Y 2Y 3Y 4Y
Truth Table
TC74VHC125
Inputs Output A X L H Y Z L H G L H H
TC74VHC126
Inputs A X L H Output Y Z L H
G
H L L
X: Don't care Z: High impedance
X: Don't care Z: High impedance
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Absolute Maximum Ratings (Note)
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 7.0 -0.5 to VCC + 0.5 -20 20 25 50
Unit V V V mA mA mA mA mW C
180
-65 to 150
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).
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 5.5 0 to VCC
-40 to 85
Unit V V V C ns/V
0 to 100 (VCC = 3.3 0.3 V) 0 to 20 (VCC = 5 0.5 V)
Note:
The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND.
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Electrical Characteristics
DC Characteristics
Characteristics Symbol Test Condition VCC (V) High-level input voltage 2.0 VIH
Ta = 25C Min 1.50 VCC x 0.7

Ta = -40 to 85C Max

Unit
Typ.

Min 1.50 VCC x 0.7

Max

3.0 to 5.5 2.0
V
Low-level input voltage
0.50 VCC x 0.3

0.50 VCC x 0.3

VIL
3.0 to 5.5 2.0
V
1.9 2.9 4.4 2.58 3.94

2.0 3.0 4.5

1.9 2.9 4.4 2.48 3.80

IOH = -50 A High-level output voltage VOH VIN = VIH or VIL IOH = -4 mA IOH = -8 mA IOL = 50 A Low-level output voltage VOL VIN = VIH or VIL 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 3.0 4.5 2.0 3.0 4.5 3.0 4.5 5.5 0 to 5.5 5.5
V
0.0 0.0 0.0

0.1 0.1 0.1 0.36 0.36
0.25 0.1
0.1 0.1 0.1 0.44 0.44
2.50 1.0 A A A
V
4.0
40.0
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AC Characteristics (input: tr = tf = 3 ns)
Characteristics Symbol Test Condition VCC (V) 3.3 0.3
Ta = 25C CL (pF) 15 50 15 50 15 50 15 50 50 50 50 50 Min

Ta = -40 to 85C Max 8.0 11.5 5.5 7.5 8.0 11.5 5.1 7.1 13.2 8.8 1.5 1.0 10

Unit
Typ. 5.6 8.1 3.8 5.3 5.4 7.9 3.6 5.1 9.5 6.1

Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0

Max 9.5 13.0 6.5 8.5 9.5 13.0 6.0 8.0 15.0 10.0 1.5 1.0 10

Propagation delay time
tpLH tpHL
ns
5.0 0.5
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

ns
Output disable time
tpLZ tpHZ tosLH tosHL CIN COUT CPD
RL = 1 k
ns
Output to output skew Input capacitance Output capacitance Power dissipation capacitance (Note 2)
(Note 1)
ns pF pF pF
4 6 14 15
TC74VHC125 TC74VHC126
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/4 (per gate)
Noise Characteristics (input: tr = tf = 3 ns)
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 CL = 50 pF CL = 50 pF CL = 50 pF 5.0 Ta = 25C Typ. 0.3 Limit 0.8 Unit
VOLP
V
VOLV VIHD VILD
5.0 5.0 5.0
-0.3
-0.8
V V V
3.5 1.5
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Input Equivalent Circuit
INPUT
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Package Dimensions
Weight: 0.18 g (typ.)
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Package Dimensions (Note)
Note:
This package is not available in Japan.
Weight: 0.12 g (typ.)
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TC74VHC125,126F/FN/FT/FK
Package Dimensions
Weight: 0.06 g (typ.)
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Package Dimensions
Weight: 0.02 g (typ.)
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TC74VHC125,126F/FN/FT/FK
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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