CY54FCT543T, CY74FCT543T
8-BIT LATCHED REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCCS030A – MAY 1994 – REVISED OCTOBER 2001
D
D
D
D
D
D
D
D
D
D
D
D
Function, Pinout, and Drive Compatible
With FCT and F Logic
Reduced VOH (Typically = 3.3 V) Versions
of Equivalent FCT Functions
Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
Ioff Supports Partial-Power-Down Mode
Operation
Matched Rise and Fall Times
Fully Compatible With TTL Input and
Output Logic Levels
3-State Outputs
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
Separation Controls for Data Flow in Each
Direction
Back-to-Back Latches for Storage
CY54FCT543T
– 48-mA Output Sink Current
– 12-mA Output Source Current
CY74FCT543T
– 64-mA Output Sink Current
– 32-mA Output Source Current
CY54FCT543T . . . D PACKAGE
CY74FCT543T . . . Q OR SO PACKAGE
(TOP VIEW)
LEBA
OEBA
A0
A1
A2
A3
A4
A5
A6
A7
CEAB
GND
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
VCC
CEBA
B0
B1
B2
B3
B4
B5
B6
B7
LEAB
OEAB
description
The ’FCT543T octal latched transceivers contain two sets of eight D-type latches with separate latch-enable
(LEAB, LEBA) and output-enable (OEAB, OEBA) inputs for each set to permit independent control of input and
output in either direction of data flow. For data flow from A to B, for example, the A-to-B enable (CEAB) input
must be low in order to enter data from A or to take data from B, as indicated in the function table. With CEAB
low, a low signal on the A-to-B latch-enable (LEAB) input makes the A-to-B latches transparent; a subsequent
low-to-high transition of the LEAB signal puts the A latches in the storage mode and their outputs no longer
change with the A inputs. With CEAB and OEAB low, the 3-state B-output buffers are active and reflect the data
present at the output of the A latches. Control of data from B to A is similar, but uses CEBA, LEBA, and OEBA
inputs.
These devices are 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.
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 2001, Texas Instruments Incorporated
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.
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
CY54FCT543T, CY74FCT543T
8-BIT LATCHED REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCCS030A – MAY 1994 – REVISED OCTOBER 2001
PIN DESCRIPTION
NAME
DESCRIPTION
OEAB
A-to-B output-enable input (active low)
OEBA
B-to-A output-enable input (active low)
CEAB
A-to-B enable input (active low)
CEBA
B-to-A enable input (active low)
LEAB
A-to-B latch-enable input (active low)
LEBA
B-to-A latch-enable input (active low)
A
A-to-B data inputs or B-to-A 3-state outputs
B
B-to-A data inputs or A-to-B 3-state outputs
ORDERING INFORMATION
QSOP – Q
SOIC – SO
QSOP – Q
–40°C to 85°C
SOIC – SO
QSOP – Q
SOIC – SO
–55°C
55°C to 125°C
SPEED
(ns)
PACKAGE†
TA
CDIP – D
ORDERABLE
PART NUMBER
Tape and reel
5.3
CY74FCT543CTQCT
Tube
5.3
CY74FCT543CTSOC
Tape and reel
5.3
CY74FCT543CTSOCT
Tape and reel
6.5
CY74FCT543ATQCT
Tube
6.5
CY74FCT543ATSOC
Tape and reel
6.5
CY74FCT543ATSOCT
Tape and reel
8.5
CY74FCT543TQCT
Tube
8.5
CY74FCT543TSOC
Tape and reel
8.5
CY74FCT543TSOCT
Tube
10
CY54FCT543TDMB
Tube
10
TOP-SIDE
MARKING
FCT543C
FCT543C
FCT543A
FCT543A
FCT543
FCT543
CY54FCT543TLMB
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE‡
INPUTS
LEAB
OEAB
LATCH
A TO B§
H
X
X
Storing
Z
X
H
X
Storing
X
X
X
H
X
Z
L
L
L
Transparent
Current A inputs
L
H
L
Storing
Previous A inputs
CEAB
OUTPUT
B
H = High logic level, L = Low logic level, X = Don’t care,
Z = High-impedance state
‡ A-to-B data flow shown; B-to-A flow control is the same, except uses
CEBA, LEBA, and OEBA.
§ Before LEAB low-to-high transition
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
CY54FCT543T, CY74FCT543T
8-BIT LATCHED REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCCS030A – MAY 1994 – REVISED OCTOBER 2001
logic diagram (positive logic)
OEBA
CEBA
LEBA
OEAB
CEAB
LEAB
A0
2
23
1
13
11
14
LE
3
Q
22
D
B0
LE
Q
D
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61°C/W
SO package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46°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 ratings” may 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 conditions” is 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)
CY54FCT543T
CY74FCT543T
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.75
5
5.25
UNIT
VCC
VIH
Supply voltage
VIL
IOH
Low-level input voltage
0.8
0.8
V
High-level output current
–12
–32
mA
IOL
TA
Low-level output current
48
64
mA
85
°C
High-level input voltage
2
Operating free-air temperature
–55
2
125
–40
V
V
NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
CY54FCT543T, CY74FCT543T
8-BIT LATCHED REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCCS030A – MAY 1994 – REVISED OCTOBER 2001
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
CY54FCT543T
TYP† MAX
TEST CONDITIONS
VCC = 4.5 V,
VCC = 4.75 V,
IIN = –18 mA
IIN = –18 mA
VCC = 4.5 V,
IOH = –12 mA
IOH = –32 mA
VCC = 4
4.75
75 V
MIN
–0.7
–1.2
–0.7
2.4
2.4
Vhys
All inputs
II
VCC = 5.5 V,
VCC = 5.25 V,
VIN = VCC
VIN = VCC
5
IIH
VCC = 5.5 V,
VCC = 5.25 V,
VIN = 2.7 V
VIN = 2.7 V
±1
IIL
VCC = 5.5 V,
VCC = 5.25 V,
VIN = 0.5 V
VIN = 0.5 V
±1
IOZH
VCC = 5.5 V,
VCC = 5.25 V,
VOUT = 2.7 V
VOUT = 2.7 V
10
IOZL
VCC = 5.5 V,
VCC = 5.25 V,
VOUT = 0.5 V
VOUT = 0.5 V
–10
IOS‡
VCC = 5.5 V,
VCC = 5.25 V,
VOUT = 0 V
VOUT = 0 V
VCC = 0 V,
VCC = 5.5 V,
VOUT = 4.5 V
VIN ≤ 0.2 V,
∆ICC
ICCD¶
0.3
3.3
0.55
IOL = 64 mA
0.3
0.2
0.55
0.2
±1
±1
10
–10
–120
–225
–60
–120
±1
VIN ≥ VCC – 0.2 V
VIN ≥ VCC – 0.2 V
VCC = 5.25 V,
VIN ≤ 0.2 V,
VCC = 5.5 V, VIN = 3.4 V§, f1 = 0, Outputs open
VCC = 5.25 V, VIN = 3.4 V§, f1 = 0, Outputs open
0.1
0.5
VCC = 5.5 V, Outputs open,
One input switching at 50% duty cycle,
CEAB and OEAB = low, CEBA = high,
VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V
VCC = 5.25 V, Outputs open,
One input switching at 50% duty cycle,
CEAB and OEAB = low, CEBA = high,
VIN ≤ 0.2 V or VIN ≥ VCC – 0.2 V
0.06
V
V
5
–60
V
V
2
IOH = –15 mA
IOL = 48 mA
VCC = 4.5 V,
VCC = 4.75 V,
ICC
–1.2
UNIT
3.3
VOL
Ioff
CY74FCT543T
TYP† MAX
MIN
–225
±1
0.2
0.1
0.2
0.5
2
2
µA
µA
µA
µA
µA
mA
µA
mA
mA
0.12
mA/
MHz
0.06
0.12
† 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.
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
CY54FCT543T, CY74FCT543T
8-BIT LATCHED REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCCS030A – MAY 1994 – REVISED OCTOBER 2001
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted) (continued)
PARAMETER
One bit
switching
at f1 = 5 MHz
at 50% duty
cycle
IC#
CY54FCT543T
TYP† MAX
TEST CONDITIONS
VCC = 5.5 V,
f0 = 10 MHz,
Outputs open,,
CEAB and OEAB = Eight bits
low, CEBA = high,
switching
f0 = LEAB = 10 MHz at f = 5 MHz
1
at 50% duty
cycle
One bit
switching
at f1 = 5 MHz
at 50% duty
cycle
VCC = 5.25 V,
f0 = 10 MHz,
Outputs open,,
CEAB and OEAB = Eight bits
low, CEBA = high,
switching
f0 = LEAB = 10 MHz at f = 5 MHz
1
at 50% duty
cycle
MIN
VIN ≤ 0.2 V or
VIN ≥ VCC – 0.2 V
0.7
1.4
VIN = 3.4 V or GND
1.2
3.4
VIN ≤ 0.2 V or
VIN ≥ VCC – 0.2 V
2.8
5.6||
VIN = 3.4 V or GND
5.1
14.6||
CY74FCT543T
TYP† MAX
MIN
UNIT
mA
VIN ≤ 0.2 V or
VIN ≥ VCC – 0.2 V
0.7
1.4
VIN = 3.4 V or GND
1.2
3.4
VIN ≤ 0.2 V or
VIN ≥ VCC – 0.2 V
2.8
5.6||
VIN = 3.4 V or GND
5.1
14.6||
Ci
Co
† Typical values are at VCC = 5 V, TA = 25°C.
# IC
= ICC + ∆ICCDHNT + ICCD(f0/2 + f1N1)
ICC = Quiescent 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.
5
10
5
10
pF
9
12
9
12
pF
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figure 1)
CY54FCT543T
PARAMETER
MIN
MAX
CY74FCT543T
MIN
MAX
CY74FCT543AT
MIN
MAX
CY74FCT543CT
MIN
MAX
UNIT
tw
tsu
Pulse duration, LEAB or LEBA
5
5
5
5
ns
Setup time, data before LEAB↓ or LEBA↓
3
2
2
2
ns
th
Hold time, data after LEAB↓ or LEBA↓
2
2
2
2
ns
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
CY54FCT543T, CY74FCT543T
8-BIT LATCHED REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCCS030A – MAY 1994 – REVISED OCTOBER 2001
switching characteristics over operating free-air temperature range (see Figure 1)
6
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
tPLH
tPHL
A or B
B or A
tPLH
tPHL
LEBA or LEAB
A or B
tPZH
tPZL
OEBA or OEAB
A or B
tPZH
tPZL
CEBA or CEAB
A or B
tPHZ
tPLZ
OEBA or OEAB
A or B
tPHZ
tPLZ
CEBA or CEAB
A or B
CY54FCT543T
CY74FCT543T
CY74FCT543AT
CY74FCT543CT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
2
10
2.5
8.5
2.5
6.5
2.5
5.3
2
10
2.5
8.5
2.5
6.5
2.5
5.3
2.5
14
2.5
12.5
2.5
8
2.5
7
2.5
14
2.5
12.5
2.5
8
2.5
7
2
14
2
12
2
9
2
8
2
14
2
12
2
9
2
8
2
14
2
12
2
9
2
8
2
14
2
12
2
9
2
8
2
13
2
9
2
7.5
2
6.5
2
13
2
9
2
7.5
2
6.5
2
13
2
9
2
7.5
2
6.5
2
13
2
9
2
7.5
2
6.5
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
UNIT
ns
ns
ns
ns
ns
ns
CY54FCT543T, CY74FCT543T
8-BIT LATCHED REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCCS030A – MAY 1994 – REVISED OCTOBER 2001
PARAMETER MEASUREMENT INFORMATION
7V
From Output
Under Test
From Output
Under Test
Test
Point
CL = 50 pF
(see Note A)
Open
GND
CL = 50 pF
(see Note A)
500 Ω
S1
500 Ω
TEST
S1
Open
7V
Open
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
500 Ω
LOAD CIRCUIT FOR
3-STATE OUTPUTS
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
3V
Timing Input
tw
tsu
3V
1.5 V
Input
1.5 V
0V
th
3V
Data Input
0V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
3V
1.5 V
Input
1.5 V
0V
tPLH
tPHL
1.5 V
1.5 V
VOL
tPHL
Out-of-Phase
Output
tPLZ
≈3.5 V
1.5 V
tPZH
VOH
1.5 V
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
1.5 V
0V
Output
Waveform 1
(see Note B)
tPLH
1.5 V
1.5 V
tPZL
VOH
In-Phase
Output
3V
Output
Control
Output
Waveform 2
(see Note B)
VOL + 0.3 V
VOL
tPHZ
1.5 V
VOH – 0.3 V
VOH
≈0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
PACKAGE OPTION ADDENDUM
www.ti.com
10-Jun-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
5962-9222101M3A
ACTIVE
LCCC
FK
28
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629222101M3A
CY54FCT
543TLMB
5962-9222101MLA
ACTIVE
CDIP
JT
24
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9222101ML
A
CY54FCT543TDMB
CY54FCT543TDMB
ACTIVE
CDIP
JT
24
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-9222101ML
A
CY54FCT543TDMB
CY54FCT543TLMB
ACTIVE
LCCC
FK
28
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629222101M3A
CY54FCT
543TLMB
CY74FCT543ATQCT
ACTIVE
SSOP
DBQ
24
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
FCT543A
Samples
CY74FCT543ATSOC
ACTIVE
SOIC
DW
24
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
FCT543A
Samples
CY74FCT543TQCT
ACTIVE
SSOP
DBQ
24
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
FCT543
Samples
CY74FCT543TSOC
ACTIVE
SOIC
DW
24
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
FCT543
Samples
CY74FCT543TSOCT
ACTIVE
SOIC
DW
24
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
FCT543
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of