Document
TC74VHC157F/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC157F, TC74VHC157FK
Quad 2-Channel Multiplexer
The TC74VHC157 is an advanced high speed CMOS QUAD 2CHANNEL MULTIPLEXER 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 consists of four 2-input digital multiplexers with common select and strobe inputs.
When the STROBE input is held “H” level, selection of data is inhibited and all the outputs become “L” level.
The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs.
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 on two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages.
Features
High speed: tpd = 4.1 ns (typ.) at VCC = 5 V Low power dissipation: ICC = 4 μA (max) at Ta = 25°C 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 V to 5.5 V Low noise: VOLP = 0.8 V (max) Pin and function compatible with 74ALS157
TC74VHC157F TC74VHC157FK
Weight SOP16-P-300-1.27A VSSOP16-P-0030-0.50
: 0.18 g (typ.) : 0.02 g (typ.)
© 2019
1
Toshiba Electronic Devices & Storage Corporation
Start of commercial production
1991-05
2019-01-31
Pin Assignment
SELECT 1 1A 2 1B 3 1Y 4 2A 5 2B 6 2Y 7
GND 8
A SG
B
A
Y
B
A
Y
B
A
YYB
(top view)
16 VCC 15 14 4A 13 4B 12 4Y 11 3A 10 3B 9 3Y
Truth Table
Inputs
ST
SELECT
A
B
H
X
X
X
L
L
L
X
L
L
H
X
L
H
X
L
L
H
X
H
X: Don’t care
Output
L L H L H
IEC Logic Symbol
TC74VHC157F/FK
(15) EN SELECT (1) G1
1A (2) 1B (3) 2A (5) 2B (6) 3A (11) 3B (10) 4A (14) 4B (13)
MUX 1
(4) 1Y (7) 2Y (9) 3Y (12) 4Y
© 2019
2
Toshiba Electronic Devices & Storage Corporation
2019-01-31
System Diagram
TC74VHC157F/FK
2 1A
φA 1B 3 φB 2A 5
φA 2B 6 φB
11 3A
φA 10 φB 3B 4A 14
φA 13 φB 4B SELECT 1
15
4 1Y 7 2Y 9
3Y 12
4Y
φA φB
Absolute Maximum Ratings (Note)
Characteristics
Symbol
Rating
Unit
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 PD Tstg
−0.5 to 7.0
V
−0.5 to 7.0
V
−0.5 to VCC + 0.5
V
−20
mA
±20
mA
±25
mA
±50
mA
180
mW
−65 to 150
°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).
© 2019
3
Toshiba Electronic Devices & Storage Corporation
2019-01-31
Operating Ranges (Note)
TC74VHC157F/FK
Characteristics
Symbol
Rating
Unit
Supply voltage Input voltage Output voltage Operating temperature
Input rise and fall time
VCC VIN VOUT Topr
dt/dv
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)
V V V °C
ns/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.
Electrical Characteristics
DC Characteristics
Characteristics
Symbol
High-level input voltage
VIH
Test Condition
Ta = 25°C
Ta = −40 to 85°C Unit
VCC (V) Min Typ. Max Min Max
2.0
1.50 ―
― 1.50 ―
―
3.0 to 5.5
VCC × 0.7
―
―
VCC × 0.7
―
V
Low-level input voltage
High-level output voltage
Low-level output voltage
Input leakage current Quiescent supply current
VIL VOH
VOL IIN ICC
2.0
―
―
3.0 to 5.5 ―
2.0
IOH = −50 μA
3.0
VIN
4.5
= VIH or VIL
IOH = −4 mA
3.0
IOH = −8 mA
4.5
2.0
IOL = 50 μA
3.0
VIN
4.5
= VIH or VIL
IOL = 4 mA
3.0
IOL = 8 mA
4.5
VIN = 5.5 or GND
0 to 5.5
1.9 2.9 4.4 2.58 3.94
― ― ―
― ―
―
― 0.50 ― 0.50
―
VCC × 0.3
―
VCC × 0.3
V
2.0
―
1.9
―
3.0
―
2.9
―
4.5
―
4.4
―
V
―
― 2.48 ―
―
― 3.80 ―
0.0 0.1
―
0.1
0.0 0.1
―
0.1
0.0 0.1
―
0.1
V
― 0.36 ― 0.44 ― 0.36 ― 0.44
― ±0.1 ― ±1.0 μA
VIN = VCC or GND
5.5
.