• Meets or exceeds JEDEC standard 18 specifications
• Product available in Radiation Tolerant and Radiation
Enhanced versions
• Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
• Available in DIP, SOIC, QSOP, CERPACK and LCC
packages
FUNCTIONAL BLOCK DIAGRAMS
0
P
PE
'161
'163
CEP
DESCRIPTION:
The IDT54/74FCT161T/163T, IDT54/74FCT161AT/ 163AT
and IDT54/74FCT161CT/163CT are high-speed synchronous modulo-16 binary counters built using an advanced dual
metal CMOS technology. They are synchronously presettable for application in programmable dividers and have two
types of count enable inputs plus a terminal count output for
versatility in forming synchronous multi-stage counters. The
IDT54/74FCT161T/AT/CT have asynchronous Master Reset
inputs that override all other inputs and force the outputs LOW.
The IDT54/74FCT163T/AT/CT have Synchronous Reset inputs that override counting and parallel loading and allow the
outputs to be simultaneously reset on the rising edge of the
clock.
P
1
P
2
P
3
CET
CP
MR ('161)
SR ('163)
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
163
ONLY
CP
161
ONLY
Q
0
CP
D CP D
D
C
Q
0
QQ
Q
DETAIL A
TC
0
DETAIL
A
Q
1
DETAIL
A
Q
2
DETAIL
A
Q
3
2611 drw 01
MILITARY AND COMMERCIAL TEMPERATURE RANGESOCTOBER 1994
2. H = HIGH Voltage Level, L = LOW Voltage Level, X = Don’t Care.
2611 tbl 02
ABSOLUTE MAXIMUM RATINGS
(1)
SymbolRatingCommercialMilitaryUnit
(2)
VTERM
Terminal Voltage
–0.5 to +7.0–0.5 to +7.0V
with Respect to
GND
(3)
VTERM
TAOperating
Terminal Voltage
with Respect to
GND
–0.5 to
CC +0.5
V
–0.5 to
VCC +0.5
0 to +70–55 to +125°C
V
Temperature
TBIASTemperature
–55 to +125–65 to +135°C
Under Bias
TSTGStorage
–55 to +125–65 to +150°C
Temperature
PTPower Dissipation0.50.5W
IOUTDC Output
–60 to +120 –60 to +120 mA
Current
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not
extended periods may affect reliability. No terminal voltage may exceed
V
2. Input and V
3. Outputs and I/O terminals only.
implied. Exposure to absolute maximum rating conditions for
CC by +0.5V unless otherwise noted.
CC terminals only.
2611 lnk 03
CAPACITANCE (TA = +25°C, f = 1.0MHz)
SymbolParameter
CINInput
Capacitance
COUTOutput
Capacitance
NOTE:
1. This parameter is measured at characterization but not tested.
(1)
ConditionsTyp.Max. Unit
VIN = 0V610pF
VOUT = 0V812pF
2611 lnk 04
6.72
IDT54/74FCT161T/AT/CT, IDT54/74FCT163T/AT/CT
FAST CMOS SYNCHRONOUS PRESETTABLE BINARY COUNTERSMILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC= 5.0V ± 10%
SymbolParameterTest Conditions
V
IHInput HIGH LevelGuaranteed Logic HIGH LevelCOM'L
(1)
(5)
Min.Typ.
2.0V——V
MIL2.7V——V
ILInput LOW LevelGuaranteed Logic LOW Level——0.8V
V
IHInput HIGH Current
I
I
ILInput LOW Current
I
IInput HIGH Current
IKClamp Diode VoltageVCC = Min., IN = –18mA—–0.7–1.2V
V
OSShort Circuit CurrentVCC = Max.
I
OHOutput HIGH VoltageVCC = Min.IOH = –6mA MIL.2.43.3—V