SN54BCT534, SN74BCT534
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS033B – AUGUST 1989 – REVISED NOVEMBER 1993
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State-of-the-Art BiCMOS Design
Significantly Reduces I
CCZ
Full Parallel Access for Loading
Buffered Control Inputs
3-State Bus-Driving Inverted Outputs
ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
SN54BCT534 . . . J OR W PACKAGE
SN74BCT534 . . . DW OR N PACKAGE
(TOP VIEW)
description
The
′BCT534
is an 8-bit flip-flop with 3-state
outputs designed specifically for driving highly
capacitive or relatively low-impedance loads. It is
particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
The eight flip-flops of the
′BCT534
are
edge-triggered D-type flip-flops. On the positive
transition of the clock, the Q outputs will be set to
the complement of the logic levels that were set up
at the data (D) inputs. The
′BCT534
provides
inverted data at its outputs.
A buffered output-enable (OE) input can be used
to place the eight outputs in either a normal logic
state (high or low logic levels) or a high-imped-
ance state. In the high-impedance state, the
outputs neither load nor drive the bus lines
significantly. The high-impedance state and the
increased drive provide the capability to drive bus
lines without need for interface or pullup
components.
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
SN54BCT534 . . . FK PACKAGE
(TOP VIEW)
1D
1Q
OE
V
CC
2D
2Q
3Q
3D
4D
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
8Q
8D
7D
7Q
6Q
6D
The output-enable (OE) input does not affect the internal operations of the flip-flop. Previously stored data can
be retained or new data can be entered while the outputs are in the high-impedance state.
The SN54BCT534 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
SN74BCT534 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each flip-flop)
INPUTS
OE
L
L
L
H
CLK
↑
↑
H or L
X
D
H
L
X
X
OUTPUT
Q
L
H
Q0
Z
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.
Copyright
©
1993, Texas Instruments Incorporated
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
4Q
GND
CLK
5Q
5D
1
SN54BCT534, SN74BCT534
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS033B – AUGUST 1989 – REVISED NOVEMBER 1993
logic symbol
†
1
OE
CLK
11
EN
C1
2
5
6
9
12
15
16
19
7Q
8Q
3Q
4Q
5Q
6Q
logic diagram (positive logic)
OE
CLK
1
11
C1
1Q
2Q
C1
2D
4
1D
5
2Q
1D
3
1D
2
1D
2D
3D
4D
5D
6D
7D
8D
3
4
7
8
13
14
17
18
1D
1Q
C1
3D
7
1D
6
3Q
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
4D
C1
8
1D
9
4Q
C1
5D
13
1D
C1
6D
14
1D
12
5Q
15
6Q
C1
7D
17
1D
16
7Q
C1
8D
18
1D
19
8Q
2
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
SN54BCT534, SN74BCT534
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS033B – AUGUST 1989 – REVISED NOVEMBER 1993
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage range, V
I
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Voltage range applied to any output in the disabled or power-off state, V
O
. . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Voltage range applied to any output in the high state, V
O
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to V
CC
Input clamp current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA
Current into any output in the low state: SN54BCT534 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74BCT534 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54BCT534 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74BCT534 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
recommended operating conditions
SN54BCT534
MIN
VCC
VIH
VIL
IIK
IOH
IOL
TA
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free-air temperature
– 55
4.5
2
0.8
–18
–12
48
125
0
NOM
5
MAX
5.5
SN74BCT534
MIN
4.5
2
0.8
–18
–15
64
70
NOM
5
MAX
5.5
UNIT
V
V
V
mA
mA
mA
°C
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
3
SN54BCT534, SN74BCT534
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS033B – AUGUST 1989 – REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
VCC = 4.5 V,
VCC = 4.5 V
TEST CONDITIONS
II = –18 mA
IOH = – 3 mA
IOH = –12 mA
IOH = –15 mA
IOL = 48 mA
IOL = 64 mA
VI = 5.5 V
VI = 2.7 V
VI = 0.5 V
VO = 0
VO = 2.7 V
VO = 0.5 V
VO = Open
VO = Open
VO = Open
VI = VCC or GND
38
5
4.5
6
–100
SN54BCT534
MIN TYP†
MAX
–1.2
2.4
2
3.3
3.2
2
0.38
0.55
0.42
0.4
20
– 0.6
– 225
50
– 50
55
8
7
38
5
4.5
6
10
–100
0.55
0.4
20
– 0.6
– 225
50
– 50
55
8
7
3.1
V
mA
µA
mA
mA
µA
µA
mA
mA
mA
pF
pF
2.4
3.4
V
SN74BCT534
MIN TYP†
MAX
–1.2
UNIT
V
VOL
II
IIH
IIL
IOS‡
IOZH
IOZL
ICCL
ICCH
ICCZ
Ci
Co
VCC = 4 5 V
4.5
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5 V,
VCC = 5 V,
VO = VCC or GND
10
† All typical values are at VCC = 5 V, TA = 25°C.
‡ 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
MIN
fclock
tw
tsu
th
Clock frequency
Pulse duration
CLK high
CLK low
Data high
Setup time before CLK↑
Hold time after CLK↑
Data low
Data high
Data low
0
6
7
6
9.5
0
1
MAX
77
SN54BCT534
MIN
0
6
7
6
9.5
0
1
MAX
70
SN74BCT534
MIN
0
6
7
6
9.5
0
1
MAX
77
MHz
ns
ns
ns
UNIT
4
POST OFFICE BOX 655303
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DALLAS, TEXAS 75265
SN54BCT534, SN74BCT534
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCBS033B – AUGUST 1989 – REVISED NOVEMBER 1993
switching characteristics (see Note 2)
VCC = 5 V,
CL = 50 pF,
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
R1 = 500
Ω,
R2 = 500
Ω,
TA = 25°C
′BCT534
MIN
fmax
tPLH
tPHL
tPZH
tPZL
tPHZ
77
CLK
3.3
Q
Q
Q
3.5
3.9
OE
OE
4.6
2.6
6.7
6.2
7.6
8.2
4.7
9.6
8.8
10.3
11.1
6.7
TYP
MAX
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500
Ω,
R2 = 500
Ω,
TA = MIN to MAX†
SN54BCT534 SN74BCT534
MIN
70
3.3
3.5
3.9
4.6
2.6
12.8
11
13.1
13.7
8
MAX
MIN
77
3.3
3.5
3.9
4.6
2.6
11.4
10
12.5
13.3
7.4
6.9
MAX
MHz
ns
ns
ns
UNIT
tPLZ
1.8
4.1
6.1
1.8
7.8
1.8
† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
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