74AC161 STMICROELECTRONICS [STMicroelectronics], 74AC161 Datasheet

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74AC161

Manufacturer Part Number
74AC161
Description
SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet

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DESCRIPTION
The
SYNCRONOUS
fabricated with sub-micron silicon gate and
double-layer metal wiring C
ideal for low power applications mantaining high
speed operation similar to eqivalent Bipolar
Schottky TTL. It is a 4 bit binary counter with
Asynchronous Clear.
The circuit have four fundamental modes of
operation, in order of preference: synchronous
PIN CONNECTION AND IEC LOGIC SYMBOLS
December 1998
HIGH SPEED:
f
LOW POWER DISSIPATION:
I
HIGH NOISE IMMUNITY:
V
50 TRANSMISSION LINE DRIVING
CAPABILITY
SYMMETRICAL OUTPUT IMPEDANCE:
|I
BALANCED PROPAGATION DELAYS:
t
OPERATING VOLTAGE RANGE:
V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 161
IMPROVED LATCH-UP IMMUNITY
MAX
CC
PLH
OH
NIH
CC
= 8 A (MAX.) at T
| = I
(OPR) = 2V to 6V
=125 MHz (TYP.) at V
= V
AC161
t
PHL
OL
NIL
SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
= 24 mA (MIN)
= 28% V
is
PRESETTABLE
CC
a
A
(MIN.)
= 25
2
CC
high-speed
MOS technology. It is
o
= 5V
C
COUNTER
CMOS
reset, parallel load, count-up and hold. Four
control inputs, Master Reset (CLEAR), Parallel
Enable Input (LOAD), Count Enable Input (PE)
and Count Enable Carry Input (TE), determine
the mode of operation as shown in the Truth
Table. A LOW signal on CLEAR overrides
counting and parallel loading and sets all outputs
on LOW state. A LOW signal on LOAD overrides
counting and allows information on Parallel Data
Qn inputs to be loaded into the flip-flops on the
next rising edge of CLOCK. With LOAD and
CLEAR, PE and TE permit counting when both
are HIGH. Conversely, a LOW signal on either
PE and TE inhibits counting.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
(Plastic Package)
74AC161B
B
ORDER CODES :
(Micro Package)
74AC161
74AC161M
M
1/12

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74AC161 Summary of contents

Page 1

... CLOCK. With LOAD and CLEAR, PE and TE permit counting when both are HIGH. Conversely, a LOW signal on either PE and TE inhibits counting. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. 74AC161 M (Micro Package) 74AC161M 1/12 ...

Page 2

... INPUT AND OUTPUT EQUIVALENT CIRCUIT TRUTH TABLE INPUT S CLEAR LOAD NOTE: X:Don’t Care A,B, C,D: Logic level of data input CARRY OUT= LOGIC DIAGRAMS 2/12 PIN DESCRIPTION PIN No ...

Page 3

... TIMING CHART 74AC161 3/12 ...

Page 4

... ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Supply Voltage Input Voltage I DC Output Voltage Input Diode Current Output Diode Current Output Current Ground Current CC GND CC T Storage Temperature stg T Lead Temperature (10 sec) L Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. ...

Page 5

... A 0.001 (* ) 5 =50 A 0.001 3 4 5 GND GND 1.65 V max OLD V = 3.85 V min OHD 74AC161 Valu - Max. Min. Max. 2.1 V 3.15 3.85 0.9 0.9 V 1.35 1.35 1.65 1.65 2.9 4.4 5.4 V 2.46 3.76 4.76 0.1 0.1 0.1 0.1 0.1 0.1 V 0.36 0.44 0.36 0.44 0.36 0.44 0 ...

Page 6

... AC ELECTRICAL CHARACTERISTICS (C Symb ol Parameter t Propagation Delay Time PLH 5.0 PHL t Propagation Delay Time PLH CARRY OUT 5.0 PHL t Propagation Delay Time PLH CARRY OUT 5.0 PHL t Propagation Delay Time PHL CLR to Q 5.0 t Propagation Delay Time PHL CLR to CARRY OUT 5 ...

Page 7

... TEST CIRCUIT equivalent (includes jigand probe capacitance 500 orequivalent pulse generator (typically OUT WAVEFORM 1: PROPAGATION DELAYS, COUNT MODE (f=1MHz; 50% duty cycle) 74AC161 7/12 ...

Page 8

... WAVEFORM 2: PROPAGATION DELAYS CLEAR MODE (f=1MHz; 50% duty cycle) WAVEFORM 3: PROPAGATION DELAYS PRESET MODE (f=1MHz; 50% duty cycle) 8/12 ...

Page 9

... WAVEFORM 4: PROPAGATION DELAYS COUNTEABLE MODE (f=1MHz; 50% duty cycle) WAVEFORM 5: PROPAGATION DELAYS CASCADE MODE (f=1MHz; 50% duty cycle) 74AC161 9/12 ...

Page 10

... Plastic DIP-16 (0.25) MECHANICAL DATA DIM. MIN. TYP. a1 0. 2.54 e3 17. 10/12 mm MAX. MIN. 0.020 1.65 0.030 0.5 20 8.5 7.1 5.1 3.3 1.27 inch TYP. MAX. 0.065 0.020 0.010 0.787 0.335 0.100 0.700 0.280 0.201 0.130 0.050 P001C ...

Page 11

... MIN. TYP 0 0.35 b1 0. 9.8 E 5.8 e 1.27 e3 8.89 F 3.8 G 4 inch MAX. MIN. TYP. 1.75 0.2 0.004 1.65 0.46 0.013 0.25 0.007 0.019 45 (typ.) 10 0.385 6.2 0.228 0.050 0.350 4.0 0.149 5.3 0.181 1.27 0.019 0.62 8 (max.) 74AC161 MAX. 0.068 0.007 0.064 0.018 0.010 0.393 0.244 0.157 0.208 0.050 0.024 P013H 11/12 ...

Page 12

... Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice ...

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