8-BIT LATCH. CY74FCT2373T Datasheet

CY74FCT2373T LATCH. Datasheet pdf. Equivalent

CY74FCT2373T Datasheet
Recommendation CY74FCT2373T Datasheet
Part CY74FCT2373T
Description 8-BIT LATCH
Feature CY74FCT2373T; D Function and Pinout Compatible With the Fastest Bipolar Logic D 25-Ω Output Series Resistors Reduc.
Manufacture etcTI
Datasheet
Download CY74FCT2373T Datasheet




Texas Instruments CY74FCT2373T
D Function and Pinout Compatible With the
Fastest Bipolar Logic
D 25-Output Series Resistors Reduce
Transmission-Line Reflection Noise
D Reduced VOH (Typically = 3.3 V) Version of
Equivalent FCT Functions
D Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
D Ioff Supports Partial-Power-Down Mode
Operation
D Matched Rise and Fall Times
D 3-State Outputs
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
D Fully Compatible With TTL Input and
Output Logic Levels
D 12-mA Output Sink Current
15-mA Output Source Current
CY74FCT2373T
8-BIT LATCH
WITH 3-STATE OUTPUTS
SCCS039B – SEPTEMBER 1994 – REVISED OCTOBER 2001
Q OR SO PACKAGE
(TOP VIEW)
OE
O0
D0
D1
O1
O2
D2
D3
O3
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 O7
18 D7
17 D6
16 O6
15 O5
14 D5
13 D4
12 O4
11 LE
description
The CY74FCT2373T is an 8-bit, high-speed CMOS, TTL-compatible buffered latch with 3-state outputs that is
ideal for driving high-capacitance loads, such as memory and address buffers. On-chip 25-termination
resistors at the outputs reduce system noise caused by reflections. The CY74FCT2373T can replace the
CY74FCT373T to reduce noise in an existing design.
When the latch-enable (LE) input is high, the flip-flops appear transparent to the data. Data that meets the
required setup times are latched when LE transitions from high to low. Data appears on the bus when the
output-enable (OE) input is low. When OE is high, the bus output is in the high-impedance state. In this mode,
data can be entered into the latches.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
TA
PACKAGE†
SPEED
(ns)
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
QSOP – Q Tape and reel
4.7
CY74FCT2373CTQCT
FCT2373C
Tube
4.7 CY74FCT2373CTSOC
SOIC – SO
FCT2373C
–40°C to 85°C
Tape and reel 4.7 CY74FCT2373CTSOCT
QSOP – Q Tape and reel 5.2 CY74FCT2373ATQCT FCT2373A
QSOP – Q Tape and reel 8 CY74FCT2373TQCT FCT2373
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
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 DALLAS, TEXAS 75265
Copyright 2001, Texas Instruments Incorporated
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Texas Instruments CY74FCT2373T
CY74FCT2373T
8-BIT LATCH
WITH 3-STATE OUTPUTS
SCCS039B SEPTEMBER 1994 REVISED OCTOBER 2001
FUNCTION TABLE
INPUTS
OE LE
D
OUTPUT
O
L HH
H
LHL
L
LLX
HXX
Q0
Z
H = High logic level, L = Low logic level,
X = Dont care, Z = High-impedance
state, Q0 = Previous state of flip flops
(Q01)
logic diagram
OE 1
LE 11
D0 3
CP
Q
D
2
O0
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range to ground potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
DC input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
DC output voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
DC output current (maximum sink current/pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 mA
Package thermal impedance, θJA (see Note 1): Q package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68°C/W
SO package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
Ambient temperature range with power applied, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 135°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under absolute maximum ratingsmay cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditionsis not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 2)
MIN NOM MAX UNIT
VCC Supply voltage
VIH High-level input voltage
VIL Low-level input voltage
IOH High-level output current
IOL Low-level output current
TA Operating free-air temperature
NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation.
4.75
2
40
5 5.25 V
V
0.8 V
15 mA
12 mA
85 °C
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265



Texas Instruments CY74FCT2373T
CY74FCT2373T
8-BIT LATCH
WITH 3-STATE OUTPUTS
SCCS039B SEPTEMBER 1994 REVISED OCTOBER 2001
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYPMAX UNIT
VIK
VCC = 4.75 V,
IIN = 18 mA
0.7 1.2 V
VOH
VCC = 4.75 V,
IOH = 15 mA
2.4 3.3
V
VOL
VCC = 4.75 V,
IOL = 12 mA
0.3 0.55 V
ROUT
VCC = 4.75 V,
IOL = 12 mA
20 28 40
Vhys
All inputs
0.2 V
II
VCC = 5.25 V,
VIN = VCC
5 µA
IIH
VCC = 5.25 V,
VIN = 2.7 V
±1 µA
IIL
VCC = 5.25 V,
VIN = 0.5 V
±1 µA
IOZH
VCC = 5.25 V,
VOUT = 2.7 V
10 µA
IOZL
IOS
VCC = 5.25 V,
VCC = 5.25 V,
VOUT = 0.5 V
VOUT = 0 V
10
60 120 225
µA
mA
Ioff
VCC = 0 V,
VOUT = 4.5 V
±1 µA
ICC
ICC
VCC = 5.25 V,
VIN 0.2 V,
VIN VCC 0.2 V
VCC = 5.25 V, VIN = 3.4 V§, f1 = 0, Outputs open
0.1 0.2 mA
0.5 2 mA
ICCD
VCC = 5.25 V, One input switching at 50% duty cycle, Outputs open,
OE = GND, VIN 0.2 V or VIN VCC 0.2 V
0.06
0.12
mA/
MHz
One input switching
VIN 0.2 V or
IC#
VCC = 5.25 V,
Outputs open,
OE = GND,
at f1 = 10 MHz
at 50% duty cycle
Eight bits switching
VIN VCC 0.2 V
VIN = 3.4 V or GND
VIN 0.2 V or
LE = VCC
at f1 = 2.5 MHz
VIN VCC 0.2 V
at 50% duty cycle
VIN = 3.4 V or GND
0.7 1.4
1 2.4
1.3 2.6||
3.3 10.6||
mA
Ci 6 10 pF
Co 8 12 pF
Typical values are at VCC = 5 V, TA = 25°C.
Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus
and/or sample-and-hold techniques are preferable to minimize internal chip heating and more accurately reflect operational values. Otherwise,
prolonged shorting of a high output can raise the chip temperature well above normal and cause invalid readings in other parametric tests. In
any sequence of parameter tests, IOS tests should be performed last.
§ Per TTL-driven input (VIN = 3.4 V); all other inputs at VCC or GND
This parameter is derived for use in total power-supply calculations.
# IC = ICC + ICC × DH × NT + ICCD(f0/2 + f1 × N1)
Where:
IC = Total supply current
ICC = Power-supply current with CMOS input levels
ICC = Power-supply current for a TTL high input (VIN = 3.4 V)
DH = Duty cycle for TTL inputs high
NT = Number of TTL inputs at DH
ICCD = Dynamic current caused by an input transition pair (HLH or LHL)
f0 = Clock frequency for registered devices, otherwise zero
f1 = Input signal frequency
N1 = Number of inputs changing at f1
All currents are in milliamperes and all frequencies are in megahertz.
|| Values for these conditions are examples of the ICC formula.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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