Document
TC74ACT161,163P/F
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74ACT161P, TC74ACT161F TC74ACT163P, TC74ACT163F
Synchronous Presettable 4-Bit Binary Counter TC74ACT161P/F/FN Asynchronous Clear TC74ACT163P/F/FN Synchronous Clear
TC74ACT161P, TC74ACT163P
The TC74ACT161 and T163 are advanced high speed CMOS SYNCHRONOUS PRESETTABLE 4 BIT BINARY COUNTERs 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.
These devices may be used as a level converter for interfacing TTL or NMOS to High Speed CMOS. The inputs are compatible with TTL, NMOS and CMOS output voltage levels.
The CK input is active on the rising edge. Both LOAD and CLR inputs are active on low logic level.
Presetting of these IC’s is synchronous to the rising edge of CK. The clear function of the TC74ACT163 is synchronous to CK, while the TC74ACT161 are cleared asynchronously. Two enable inputs (ENP and ENT) and CARRY OUTPUT are provided to enable easy cascading of counters, which facilitates easy implementation of n-bit counters without using external gates. All inputs are equipped with protection circuits against static discharge or transient excess voltage.
Features
• High speed: fmax = 110 MHz (typ.) at VCC = 5 V • Low power dissipation: ICC = 8 μA (max) at Ta = 25°C • Compatible with TTL outputs: VIL = 0.8 V (max)
VIH = 2.0 V (min) • Symmetrical output impedance: |IOH| = IOL = 24 mA (min)
Capability of driving 50 Ω transmission lines. • Balanced propagation delays: tpLH ∼− tpHL • Pin and function compatible with 74F161/163
TC74ACT161F, TC74ACT163F
Weight DIP16-P-300-2.54A SOP16-P-300-1.27A
: 1.00 g (typ.) : 0.18 g (typ.)
Start of commercial production
1989-11
1
2014-03-01
Pin Assignment
TC74ACT161,163P/F
IEC Logic Symbol
TC74ACT161
TC74ACT163
Truth Table
Inputs
Outputs
CLR CLR (161) (163) LOAD
ENP
ENT
CK (161)
CK (163)
QA
QB
QC
QD
Function
L
L
X
X
X
X
L
L
L
L Reset to “0”
H
H
L
X
X
A
B
C
D Preset Data
H
H
H
X
L
No Change
No Count
H
H
H
L
X
No Change
No Count
H
H
H
H
H
Count Up
Count
H
X
X
X
X
No Change
No Count
X: Don’t care A, B, C, D: Logic level of data inputs Carry: Carry = ENT・QA・QB・QC・QD
2
2014-03-01
Timing Chart
TC74ACT161,163P/F
3
2014-03-01
System Diagram (Note)
(Note) (Note) (Note)
TC74ACT161,163P/F
(Note)
Note: Truth table of internal F/F
TC74ACT161
TC74ACT163
D CK R
Q
Q
D CK R
Q
Q
X
X
H
L
H
X
H
L
H
L
L
L
H
L
L
L
H
H
L
H
L
X
L
H
L
X
L No Change X
L No Change
X: Don’t care
4
2014-03-01
TC74ACT161,163P/F
Absolute Maximum Ratings (Note 1)
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 VCC + 0.5
V
−0.5 to VCC + 0.5
V
±20
mA
±50
mA
±50
mA
±125
mA
500 (DIP) (Note 2)/180 (SOP)
mW
−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: 500 mW in the range of Ta = −40 to 65°C. From Ta = 65 to 85°C a derating factor of −10 mW/°C should be applied up to300 mW.
Operating Ranges (Note)
Characteristics
Symbol
Rating
Unit
Supply voltage Input voltage Output voltage Operating temperature Input rise and fall time
VCC VIN VOUT Topr dt/dV
4.5 to 5.5 0 to VCC 0 to VCC −40 to 85 0 to 10
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.
5
2014-03-01
TC74ACT161,163P/F
Electrical Characteristics
DC Characteristics
Characteristics
High-level input voltage
Symbol VIH
Test Condition ⎯
Ta = 25°C
Ta = −40 to 85°C Unit
VCC (V) Min Typ. Max Min Max
4.5 to 5.5 2.0 ⎯ ⎯ 2.0 ⎯
V
Low-level input voltage
VIL
⎯
4.5 to 5.5 ⎯
⎯ 0.8 ⎯
0.8
V
High-level output voltage
Low-level output voltage
Input leakage current
VOH VOL IIN
VIN
IOH = −50 μA
4.5
= VIH or IOH = −24 mA
4.5
VIL
IOH = −75 mA (Note) 5.5
VIN
I.