CY54FCT163T, CY74FCT163T
4-BIT BINARY COUNTERS
SCCS015A 鈥?MAY 1994 鈥?REVISED OCTOBER 2001
D
D
D
D
D
D
D
D
D
Function, Pinout, and Drive Compatible
With FCT and F Logic
Reduced V
OH
(Typically = 3.3 V) Versions of
Equivalent FCT Functions
Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
I
off
Supports Partial-Power-Down Mode
Operation
ESD Protection Exceeds JESD 22
鈥?2000-V Human-Body Model (A114-A)
鈥?200-V Machine Model (A115-A)
鈥?1000-V Charged-Device Model (C101)
Matched Rise and Fall Times
Fully Compatible With TTL Input and
Output Logic Levels
CY54FCT163T
鈥?32-mA Output Sink Current
鈥?12-mA Output Source Current
CY74FCT163T
鈥?64-mA Output Sink Current
鈥?32-mA Output Source Current
CY74FCT163CT . . . Q OR SO PACKAGE
(TOP VIEW)
SR
CP
P
0
P
1
P
2
P
3
CEP
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
TC
Q
0
Q
1
Q
2
Q
3
CET
PE
CY54FCT163T . . . L PACKAGE
(TOP VIEW)
P
0
P
1
NC
P
2
P
3
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
SR
NC
V
CC
TC
Q
0
Q
1
NC
Q
2
Q
3
description
NC 鈥?No internal connection
The 鈥橣CT163T devices are high-speed
synchronous modulo-16 binary counters. They
are synchronously presettable for application in
programmable dividers. These devices have two
types of count-enable (CEP and CET) inputs, plus a terminal-count (TC) output for versatility in forming
synchronous multistaged counters. The 鈥橣CT163T devices have a synchronous-reset (SR) input that overrides
counting and parallel loading, and allows the outputs to be reset simultaneously on the rising edge of the clock.
These devices are fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the
outputs, preventing damaging current backflow through the device when it is powered down.
PIN DESCRIPTION
NAME
CEP
CET
CP
SR
P
PE
Q
TC
DESCRIPTION
Count-enable parallel input
Count-enable trickle input
Clock pulse input (active rising edge)
Synchronous-reset input (active low)
Parallel data inputs
Parallel-enable input (active low)
Flip-flop outputs
Terminal-count output
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
錚?/div>
2001, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
CEP
GND
NC
PE
CET
CP
1
1
2
3
4
5
6
7
8
9
