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Toshiba Electronic Components Datasheet

TC74VHC161FK Datasheet

Synchronous Presettable 4-Bit Counter

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TC74VHC161,163F/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC161F, TC74VHC161FK
TC74VHC163F, TC74VHC163FK
Synchronous Presettable 4-Bit Counter
TC74VHC161F/FK Binary, Asynchronous Clear
TC74VHC163F/FK Binary, Synchronous Clear
TC74VHC161F, TC74VHC163F
The TC74VHC 161 and 163 are advanced high speed CMOS
SYNCHRONOUS PRESETTABLE 4 BIT BINARY COUNTERs
fabricated with silicon gate C2MOS technology.
They achieve the high speed operation similar to equivalent Bipolar
Schottky TTL while maintaining the CMOS low power dissipation.
The CK input is active on the rising edge. Both LOAD and CLR
inputs are active on low logic level.
Presetting of each IC’s is synchronous to the rising edge of CK.
The clear function of the TC74VHC163 is synchronous to CK, while the
TC74VHC161 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.
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.
TC74VHC161FK, TC74VHC163FK
Weight
SOP16-P-300-1.27A
VSSOP16-P-0030-0.50
: 0.18 g (typ.)
: 0.02 g (typ.)
Features
High speed: fmax = 185 MHz (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 to 5.5 V
Low noise: VOLP = 0.8 V (max)
Pin and function compatible with 74ALS161/163
© 2019
1
Toshiba Electronic Devices & Storage Corporation
Start of commercial production
1991-11
2019-01-31


Toshiba Electronic Components Datasheet

TC74VHC161FK Datasheet

Synchronous Presettable 4-Bit Counter

No Preview Available !

Pin Assignment
TC74VHC161,163F/FK
1
CK 2
A3
B4
C5
D6
ENP 7
GND 8
(top view)
IEC Logic Symbol
16 VCC
15 CARRY OUTPUT
14 QA
13 QB
12 QC
11 QD
10 ENT
9
(1)
(9)
ENT (10)
ENP (7)
CK (2)
TC74VHC161
CTRDIV 16
CT = 0
M1
M2
G3 3CT = 15
G4
C5/2, 3, 4+
A (3) 1, 5D [1]
B (4)
[2]
C (5)
[4]
D (6)
[8]
(15) CARRY OUTPUT
(14) QA
(13) QB
(12) QC
(11) QD
(1)
(9)
ENT (10)
ENP (7)
CK (2)
TC74VHC163
CTRDIV 16
5CT = 0
M1
M2
G3 3CT = 15
G4
C5/2, 3, 4+
A (3) 1, 5D [1]
B (4)
[2]
C (5)
[4]
D (6)
[8]
(15) CARRY OUTPUT
(14) QA
(13) QB
(12) QC
(11) QD
Truth Table (Note)
TC74VHC161
TC74VHC163
Inputs
Inputs
CLR LD ENP ENT CK CLR LD ENP ENT
L
X
X
X
X
L
X
X
X
H
L
X
X
H
L
X
X
H
H
X
L
H
H
X
L
H
H
L
X
H
H
L
X
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
Note:
X: Don’t care
A, B, C, D: Logic level of data inputs
Carry: CARRY = ENTQAQBQCQD
Outputs
CK QA QB QC
L
L
L
ABC
No Change
No Change
Count Up
No Change
Function
QD
L Reset to “0”
D Preset Data
No Count
No Count
Count
No Count
© 2019
2
Toshiba Electronic Devices & Storage Corporation
2019-01-31


Part Number TC74VHC161FK
Description Synchronous Presettable 4-Bit Counter
Maker Toshiba
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TC74VHC161FK Datasheet PDF






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