Nexperia

74LVC161

Presettable synchronous 4-bit binary counter; asynchronous reset

-40 °C to +85 °C

-40 °C to +125 °C

Symbol Parameter

Conditions

Min

Typ [1] Max

Min

Max

Unit

Dn, PE, CEP, CET to CP;

see Fig. 12 and Fig. 13

VCC = 1.65 V to 1.95 V

3.0

-

-

3.0

-

ns

VCC = 2.3 V to 2.7 V

2.5

-

-

2.5

-

ns

VCC = 2.7 V

0.0

-

-

0.0

-

ns

th

hold time

VCC = 3.0 V to 3.6 V

0.5

0.0

-

0.5

-

ns

see Fig. 9

VCC = 1.65 V to 1.95 V

100

-

-

80

-

MHZ

VCC = 2.3 V to 2.7 V

125

-

-

100

-

MHZ

VCC = 2.7 V

150

-

-

120

-

MHz

fmax

maximum

frequency

VCC = 3.0 V to 3.6 V

150

200

-

120

-

MHz

tsk(o)

output skew time VCC = 3.0 V to 3.6 V

[3]

-

-

1.0

-

1.5

ns

per input; VI = GND to VCC

[4]

VCC = 1.65 V to 1.95 V

-

11.1

-

-

-

pF

VCC = 2.3 V to 2.7 V

-

14.7

-

-

-

pF

CPD

power dissipation

capacitance

VCC = 3.0 V to 3.6 V

-

17.9

-

-

-

pF

[1] Typical values are measured at Tamb = 25 °C and VCC = 1.2 V, 1.8 V, 2.5 V, 2.7 V and 3.3 V respectively.

[2] tpd is the same as tPLH and tPHL.

[3] Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.

[4] CPD is used to determine the dynamic power dissipation (PD in μW).

PD = CPD × VCC 2 × fi × N + ∑(CL × VCC 2 × fo) where:

fi = input frequency in MHz; fo = output frequency in MHz

CL = output load capacitance in pF

VCC = supply voltage in V

N = number of inputs switching

∑(CL × VCC 2 × fo) = sum of outputs

10.1. Waveforms and test circuit

mna911

CP input

Qn, TC output

tPHL

tPLH

tW

1/fmax

VM

VOH

VI

GND

VOL

VM

Measurement points are given in Table 8.

VOL and VOH are typical output voltage levels that occur with the output load.

Fig. 9. Clock (CP) to outputs (Qn, TC) propagation delays, the clock pulse width, and maximum frequency

74LVC161

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 7 — 22 September 2021

10 / 19