SN54BCT652, SN74BCT652
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCBS038A − AUGUST 1989 − REVISED NOVEMBER 1993
•
•
•
•
•
SN54BCT652 . . . JT OR W PACKAGE
SN74BCT652 . . . DW OR NT PACKAGE
(TOP VIEW)
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
Independent Registers and Enables for
A and B Buses
Multiplexed Real-Time and Stored Data
Power-Up High-Impedance Mode
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(JT, NT)
CLKAB
SAB
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
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
CLKBA
SBA
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
SN54BCT652 . . . FK PACKAGE
(TOP VIEW)
OEAB
SAB
CLKAB
NC
VCC
CLKBA
SBA
description
These devices consist of bus transceiver circuits,
D-type flip-flops, and control circuitry arranged for
multiplexed transmission of data directly from the
data bus or from the internal storage registers.
4
A1
A2
A3
NC
A4
A5
A6
25
6
24
7
23
8
22
9
21
10
20
19
11
12 13 14 15 16 17 18
A7
A8
GND
NC
B8
B7
Output-enable (OEAB and OEBA) inputs are
provided to control the transceiver functions.
Select-control (SAB and SBA) inputs are provided
to select whether real-time or stored data is
transferred. The circuitry used for select control
eliminates the typical decoding glitch that occurs
in a multiplexer during the transition between
stored and real-time data. A low input selects
real-time data, and a high input selects stored
data. Figure 1 illustrates the four fundamental
bus-management functions that can be performed
with the ′BCT652.
3 2 1 28 27 26
5
OEBA
B1
B2
NC
B3
B4
B5
B6
•
NC − No internal connection
Data on the A or B data bus, or both, can be stored in the internal D-type flip-flops by low-to-high transitions at
the appropriate clock (CLKAB or CLKBA) inputs regardless of the select- or enable-control pins. When SAB and
SBA are in the real-time transfer mode, it is possible to store data without using the internal D-type flip-flops by
simultaneously enabling OEAB and OEBA. In this configuration each output reinforces its input. Therefore,
when all other data sources to the two sets of bus lines are at high impedance, each set of bus lines remain at
its last state.
The SN54BCT652 is characterized for operation over the full military temperature range of −55°C to 125°C. The
SN74BCT652 is characterized for operation from 0°C to 70°C.
Copyright © 1993, 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.
• DALLAS, TEXAS 75265
• HOUSTON, TEXAS 77251−1443
POST OFFICE BOX 655303
POST OFFICE BOX 1443
2−1
SN54BCT652, SN74BCT652
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
3
21
OEAB OEBA
L
L
22
SBA
L
2
23
1
CLKAB CLKBA SAB
X
X
X
BUS B
BUS A
BUS A
BUS B
SCBS038A − AUGUST 1989 − REVISED NOVEMBER 1993
3
21
OEAB OEBA
H
H
21
OEBA
H
X
H
1
23
2
CLKAB CLKBA SAB
↑
X
↑
X
↑
↑
X
X
X
22
SBA
3
OEAB
H
L
H
X
X
X
STORAGE FROM
A, B, OR A AND B
22
SBA
X
BUS B
21
OEBA
L
L
H
1
CLKAB
23
CLKBA
2
SAB
22
SBA
L
X
L
L
L
X
H
X
H
H
H
X
TRANSFER STORED DATA
TO A AND/OR B
Figure 1. Bus-Management Functions
Pin numbers shown are for the DW, JT, NT, and W packages.
2−2
2
SAB
L
BUS A
BUS A
3
OEAB
X
L
L
23
CLKBA
X
REAL-TIME TRANSFER
BUS A TO BUS B
BUS B
REAL-TIME TRANSFER
BUS B TO BUS A
1
CLKAB
X
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
SN54BCT652, SN74BCT652
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCBS038A − AUGUST 1989 − REVISED NOVEMBER 1993
FUNCTION TABLE
DATA I/O†
INPUTS
OPERATION OR FUNCTION
OEAB
OEBA
CLKAB
CLKBA
SAB
SBA
A1 THRU A8
B1 THRU B8
L
H
H or L
H or L
X
X
Input
Input
Isolation
L
H
↑
↑
X
X
Input
Input
Store A and B data
X
H
↑
H or L
X
X
Input
Unspecified‡
Store A, hold B
H
H
↑
↑
X‡
X
Input
Output
Store A in both registers
L
X
H or L
↑
X
X
Unspecified‡
Input
Hold A, store B
L
L
↑
↑
X
X‡
Output
Input
Store B in both registers
L
L
X
X
X
L
Output
Input
Real-time B data to A bus
L
L
X
H or L
X
H
Output
Input
Stored B data to A bus
H
H
X
X
L
X
Input
Output
Real-time A data to B bus
H
H
H or L
X
H
X
Input
Output
Stored A data to B bus
H
L
H or L
H or L
H
H
Output
Output
Stored A data to B bus and
stored B data to A bus
†
The data output functions may be enabled or disabled by a variety of level combinations at the OEAB or OEBA inputs. Data input functions are
always enabled; i.e., data at the bus pins is stored on every low-to-high transition on the clock inputs.
‡ Select control = L; clocks can occur simultaneously.
Select control = H; clocks must be staggered in order to load both registers.
logic symbol§
OEBA
OEAB
CLKBA
SBA
CLKAB
SAB
A1
21
3
23
22
1
EN1 [BA]
EN2 [AB]
C4
G5
2
C6
G7
4
≥1
1
A4
A5
A6
A7
A8
≥1
7
1
A3
20
B1
5 1
6D
A2
4D
5
2
7
5
19
6
18
7
17
8
16
9
15
10
14
11
13
B2
B3
B4
B5
B6
B7
B8
§
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the DW, JT, NT, and W packages.
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
2−3
SN54BCT652, SN74BCT652
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCBS038A − AUGUST 1989 − REVISED NOVEMBER 1993
logic diagram (positive logic)
OEBA
OEAB
CLKBA
SBA
CLKAB
SAB
21
3
23
22
1
2
One of Eight
Channels
1D
C1
A1
4
20
B1
1D
C1
To Seven Other Channels
Pin numbers shown are for the DW, JT, NT, and W packages.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.5 V to 7 V
Input voltage range: Control inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.5 V to 7 V
I/O ports (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.5 V to 5.5 V
Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . . . − 0.5 V to 7 V
Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 0.5 V to VCC
Current into any output in the low state: SN54BCT652 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74BCT652 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54BCT652 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 55°C to 125°C
SN74BCT652 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . − 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 input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2−4
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
SN54BCT652, SN74BCT652
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCBS038A − AUGUST 1989 − REVISED NOVEMBER 1993
recommended operating conditions
SN54BCT652
SN74BCT652
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
UNIT
VCC
Supply voltage
VIH
High-level input voltage
VIL
Low-level input voltage
0.8
0.8
V
IIK
Input clamp current
−18
−18
mA
IOH
High-level output current
−12
−15
mA
IOL
Low-level output current
64
mA
TA
Operating free-air temperature
70
°C
2
2
V
48
−55
125
V
0
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54BCT652
PARAMETER
VIK
TEST CONDITIONS
VCC = 4.5 V,
TYP†
2.4
3.3
2
3.2
II = −18 mA
IOH = −12 mA
VCC = 4.5 V
SN74BCT652
MAX
IOL = 48 mA
VCC = 4
4.5
5V
0.38
IIH‡
IIL‡
Control inputs
VCC = 5
5.5
5V
V,
VI = 5
5.5
5V
5V
VCC = 5
5.5
V,
7V
VI = 2
2.7
VCC = 5
5.5
5V
V,
VI = 0
0.5
5V
VCC = 5.5 V,
VO = 0
A or B port
Control inputs
IOS§
3.3
2
3.1
−100
MAX
−1.2
UNIT
V
0.55
0.42
A or B port
Control inputs
2.4
IOL = 64 mA
A or B port
II
TYP†
V
IOH = −15 mA
VOL
MIN
−1.2
IOH = − 3 mA
VOH
MIN
0.55
1
1
1
1
70
70
20
20
−0.7
−0.7
−0.7
−0.7
−225
−100
V
mA
A
μA
mA
−225
mA
ICCL
A or B port
VCC = 5.5 V,
VI = 0
ICCH
A or B port
VCC = 5.5 V,
VI = 4.5 V
43
69
43
69
mA
6
10
6
10
ICCZ
A or B port
VCC = 5.5 V,
VI = 0
mA
10
17
10
17
mA
Ci
Control inputs
VCC = 5 V,
VI = 2.5 V or 0.5 V
6
6
pF
Cio
A or B port
VCC = 5 V,
VO = 2.5 V or 0.5 V
14
14
pF
†
All typical values are at VCC = 5 V, TA = 25°C.
For I/O ports, the parameters IIH and IIL include the off-state output current.
§ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
‡
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
VCC = 5 V,
TA = 25°C
fclock
Clock frequency
tw
Pulse duration, CLK high or low
tsu
th
SN54BCT652
MIN
MAX
MIN
MAX
0
77
0
77
SN7BCTT652
MIN
MAX
0
77
UNIT
MHz
6.5
7
6.5
ns
Setup time, A or B before CLKAB↑ or CLKBA↑
5
6
5
ns
Hold time, A or B after CLKAB↑ or CLKBA↑
1
1
1
ns
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
2−5
SN54BCT652, SN74BCT652
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCBS038A − AUGUST 1989 − REVISED NOVEMBER 1993
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, CL = 50 pF (unless otherwise noted) (see Note 2)
PARAMETER
FROM
(INPUT)
VCC = 5 V,
TA = 25°C
TO
(OUTPUT)
MIN
fmax
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
TYP
SN54BCT652
MIN
77
CLKBA
A
CLKAB
B
A
B
B
A
SBA†
(with B high)
A
SBA†
(with B low)
A
SAB†
(with A high)
B
SAB†
(with A low)
B
OEBA
A
OEBA
A
OEAB
B
OEAB
B
MIN
MAX
SN74BCT652
MIN
77
77
2−6
6.9
8.9
2.6
11.6
2.6
10.5
2.8
6.8
8.8
2.8
10.7
2.8
9.9
2.6
6.9
8.9
2.6
11.6
2.6
10.5
2.8
6.8
8.8
2.8
10.7
2.8
9.9
1.7
5.8
7.5
1.7
10.3
1.7
8.9
2.4
6.5
8.2
2.4
11
2.4
9.8
1.7
5.8
7.5
1.7
10.3
1.7
8.9
2.4
6.5
8.2
2.4
11
2.4
9.8
3.5
8.8
10.8
3.5
14.2
3.5
13.1
2.4
5.9
7.7
2.4
9.1
2.4
8.5
3
7.6
9.7
3
12.4
3
11.3
3.8
8.3
10.4
3.8
12.9
3.8
12.5
3.5
8.8
10.8
3.5
14.2
3.5
13.1
2.4
5.9
7.7
2.4
9.1
2.4
8.5
3
7.6
9.7
3
12.4
3
11.3
3.8
8.3
10.4
3.8
12.9
3.8
12.5
2.5
7.2
8.9
2.5
11.2
2.5
10.6
3.2
8.1
10.1
3.2
12.6
3.2
12
2.8
6.7
8.6
2.8
10.9
2.8
10
2.4
6.3
8.4
2.4
10.5
2.4
9.5
1.5
5.4
7.1
1.5
9
1.5
8.1
2.3
6.2
8.1
2.3
10.3
2.3
9.3
3.5
8.2
10
3.5
12.2
3.5
11.6
2.8
7.2
9.5
2.8
12
2.8
11.3
•
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POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
MHz
2.6
† These parameters are measured with the internal output state of the storage register opposite to that of the bus input.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
UNIT
MAX
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
PACKAGE OPTION ADDENDUM
www.ti.com
14-Feb-2021
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)
(4/5)
(6)
SN74BCT652DW
ACTIVE
SOIC
DW
24
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BCT652
(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