Datasheet SN74BCT573DW, SN74BCT573DWR, SN74BCT573N, SNJ54BCT573FK, SNJ54BCT573J Datasheet (Texas Instruments)

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SN54BCT573, SN74BCT573
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS071A – AUGUST 1990 – REVISED NOVEMBER 1993
State-of-the-Art BiCMOS Design
CCZ
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Full Parallel Access for Loading
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Plastic and Ceramic 300-mil DIPs (J, N)
description
These 8-bit latches feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
The eight latches of the BCT573 are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs will follow the data (D) inputs. When the latch enable is taken low, the Q outputs will be latched at the logic levels that were set up at the D inputs.
SN54BCT573 ...J OR W PACKAGE
SN74BCT573 . . . DW OR N PACKAGE
SN54BCT573 . . . FK PACKAGE
3D 4D 5D 6D 7D
(TOP VIEW)
OE
1
1D
2
2D
3
3D
4
4D
5
5D
6
6D
7
7D
8
8D
9
GND
10
(TOP VIEW)
2D1DOE
3 2 1 20 19
4 5 6 7 8
910111213
20 19 18 17 16 15 14 13 12 11
V
CC
V 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q LE
1Q
18 17 16 15 14
CC
2Q 3Q 4Q 5Q 6Q
A buffered output-enable (OE to place the eight outputs in either a normal logic
) input can be used
8D
GND
LE
8Q
7Q
state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components.
The output enable (OE
) does not affect the internal operations of the latches. Old data can be retained or new
data can be entered while the outputs are in the high-impedance state. The SN54BCT573 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74BCT573 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each latch)
INPUTS
OE LE D
L H H H L HL L L LX Q
H X X Z
OUTPUT
Q
0
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 1993, Texas Instruments Incorporated
2–1
SN54BCT573, SN74BCT573
UNIT
OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SCBS071A – AUGUST 1990 – REVISED NOVEMBER 1993
logic symbol
OE LE
1D 2D 3D 4D 5D 6D 7D 8D
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
1 11
2 3 4 5 6 7 8 9
EN C1
1D
19 18 17 16 15 14 13 12
logic diagram (positive logic)
1
OE
11
LE
1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q
1D
2
To Seven Other Channels
C1 1D
19
1Q
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
Input voltage range, VI (see Note 1) – 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state, V Voltage range applied to any output in the high state, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O
O
Input clamp current, IIK (VI < 0) –30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state, IO: SN54BCT573 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT573 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54BCT573 – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT573 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 negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
– 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
– 0.5 V to 5.5 V. . . . . . . . . . . . . . .
– 0.5 V to V
CC
recommended operating conditions
V V V I
IK
I
OH
I
OL
T
2–2
CC IH IL
A
Supply voltage 4.5 5 5.5 4.5 5 5.5 V High-level input voltage 2 2 V Low-level input voltage 0.8 0.8 V Input clamp current –18 –18 mA High-level output current –12 –15 mA Low-level output current 48 64 mA Operating free-air temperature –55 125 0 70 °C
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
SN54BCT573 SN74BCT573
MIN NOM MAX MIN NOM MAX
SN54BCT573, SN74BCT573
PARAMETER
TEST CONDITIONS
UNIT
V
V
V
V
(INPUT)
(OUTPUT)
D
Q
ns
LE
Q
ns
OE
Q
ns
OE
Q
ns
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS071A – AUGUST 1990 – REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
SN54BCT573 SN74BCT573
MIN TYP†MAX MIN TYP†MAX
V
IK
V
OH
OL
I
I
I
IH
I
IL
I
OS
I
OZH
I
OZL
I
CCL
I
CCH
I
CCZ
C
i
C
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.
o
VCC = 4.5 V, II = –18 mA –1.2 –1.2 V
IOH = –3 mA 2.4 3.3 2.4 3.3
VCC = 4.5 V
= 4.5
CC
VCC = 5.5 V, VI = 5.5 V 0.4 0.4 mA VCC = 5.5 V, VI = 2.7 V 20 20 µA VCC = 5.5 V, VI = 0.5 V –0.6 –0.6 mA VCC = 5.5 V, VO = 0 –100 –225 –100 –225 mA VCC = 5.5 V, VO = 2.7 V 50 50 µA VCC = 5.5 V, VO = 0.5 V –50 –50 µA VCC = 5.5 V, Outputs open 62 62 mA VCC = 5.5 V, Outputs open 8 8 mA VCC = 5.5 V, Outputs open 8 8 mA VCC = 5 V, VI = 2.5 V or 0.5 V 5.5 5.5 pF VCC = 5 V, VO = 2.5 V or 0.5 V 7.5 7.5 pF
IOH = –12 mA 2 3.2 IOH = –15 mA 2 3.1 IOL = 48 mA 0.38 0.55 IOL = 64 mA 0.42 0.55
V
timing requirements over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
VCC = 5 V,
TA = 25°C MIN MAX MIN MAX MIN MAX
t
w
t
su
t
h
Pulse duration, LE high 4 4 4 ns Setup time, data before LE 1 2.5 1 ns Hold time, data after LE 4 4 4 ns
SN54BCT573 SN74BCT573
UNIT
switching characteristics over recommended ranges of supply voltage and operating free-air temperature, C
PARAMETER
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
= 50 pF (unless otherwise noted) (see Note 2)
L
FROM
TO
VCC = 5 V,
TA = 25°C
MIN TYP MAX MIN MAX MIN MAX
2 5 7.2 1 9.8 2 8.4
2.8 5.9 8.2 1.5 10.3 2.8 9.6
2.4 6.1 7.2 2 9.7 2.4 8.1
2.9 5.2 7.1 2 8.8 2.9 7.8 3 6.2 8.5 2.5 11 3 10.4
4.3 7.1 9.3 3.5 11.5 4.3 11
2.2 3.9 5.6 1.5 7.2 2.2 6
1.7 3.6 5.2 1 7 1.7 6
SN54BCT573 SN74BCT573
UNIT
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
2–3
SN54BCT573, SN74BCT573 OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SCBS071A AUGUST 1990 – REVISED NOVEMBER 1993
2–4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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