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SN54HC640J

Part # SN54HC640J
Description Bus XCVR Single 8-CH 3-ST 20-Pin CDIP Tube - Rail/Tube
Category IC
Availability In Stock
Qty 1
Qty Price
1 + $4.08183
Manufacturer Available Qty
Texas Instruments
Date Code: 9838
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

SN54HC640, SN74HC640
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS303A – JANUARY 1996 – REVISED MAY 1997
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C SN54HC640 SN74HC640
UNIT
PARAMETER
TEST
CONDITIONS
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 1.9 1.998 1.9 1.9
I
OH
= –20 µA
4.5 V 4.4 4.499 4.4 4.4
V
OH
V
I
= V
IH
or V
IL
6 V 5.9 5.999 5.9 5.9
V
I
OH
= –6 mA 4.5 V 3.98 4.3 3.7 3.84
I
OH
= –7.8 mA 6 V 5.48 5.8 5.2 5.34
2 V 0.002 0.1 0.1 0.1
I
OL
= 20 µA
4.5 V 0.001 0.1 0.1 0.1
V
OL
V
I
= V
IH
or V
IL
6 V 0.001 0.1 0.1 0.1
V
I
OL
= 6 mA 4.5 V 0.17 0.26 0.4 0.33
I
OL
= 7.8 mA 6 V 0.15 0.26 0.4 0.33
I
I
DIR or OE V
I
= V
CC
or 0 6 V ±0.1 ±100 ±1000 ±1000 nA
I
OZ
A or B V
O
= V
CC
or 0 6 V ±0.01 ±0.5 ±10 ±5 µA
I
CC
V
I
= V
CC
or 0, I
O
= 0 6 V 8 160 80 µA
C
i
DIR or OE 2 V to 6 V 3 10 10 10 pF
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO
T
A
= 25°C SN54HC640 SN74HC640
UNIT
PARAMETER
(INPUT) (OUTPUT)
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 29 105 160 130
t
pd
A or B B or A
4.5 V 10 21 32 26
ns
6 V 8 18 27 22
2 V 109 230 340 290
t
en
OE A or B
4.5 V 27 46 68 58
ns
6 V 20 39 58 49
2 V 40 150 225 190
t
dis
OE A or B
4.5 V 18 30 45 38
ns
6 V 16 26 38 32
2 V 20 60 90 75
t
t
A or B
4.5 V 8 12 18 15
ns
6 V 6 10 15 13
SN54HC640, SN74HC640
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS303A – JANUARY 1996 – REVISED MAY 1997
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, C
L
= 150 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO
T
A
= 25°C SN54HC640 SN74HC640
UNIT
PARAMETER
(INPUT) (OUTPUT)
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 44 190 290 235
t
pd
A or B B or A
4.5 V 14 38 58 47
ns
6 V 11 33 49 41
2 V 124 315 470 395
t
en
OE A or B
4.5 V 31 63 94 79
ns
6 V 23 54 80 68
2 V 45 210 315 265
t
t
A or B
4.5 V 17 42 63 53
ns
6 V 13 36 53 45
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance per transceiver No load 40 pF
SN54HC640, SN74HC640
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS303A – JANUARY 1996 – REVISED MAY 1997
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
50%50%
10%10%
90% 90%
V
CC
0 V
t
r
t
f
Input
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
50%
50%50%
10%10%
90% 90%
V
CC
V
OH
V
OL
0 V
t
r
t
f
Input
In-Phase
Output
50%
t
PLH
t
PHL
50% 50%
10% 10%
90%90%
V
OH
V
OL
t
r
t
f
t
PHL
t
PLH
Out-of-Phase
Output
50%
10%
90%
V
CC
≈ V
CC
V
OL
0 V
Output
Control
(Low-Level
Enabling)
Output
Waveform 1
(See Note B)
50%
t
PZL
t
PLZ
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
V
OH
≈ 0 V
50%
50%
t
PZH
t
PHZ
Output
Waveform 2
(See Note B)
≈ V
CC
Test
Point
From Output
Under Test
C
L
(see Note A)
R
L
V
CC
S1
S2
LOAD CIRCUIT
PARAMETER C
L
t
PZH
t
pd
or t
t
t
dis
t
en
t
PZL
t
PHZ
t
PLZ
1 kΩ
1 kΩ
50 pF
or
150 pF
50 pF
Open Closed
R
L
S1
Closed Open
S2
Open Closed
Closed Open
50 pF
or
150 pF
Open Open––
NOTES: A. C
L
includes probe and test-fixture 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. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, Z
O
= 50 Ω, t
r
= 6 ns, t
f
= 6 ns.
D. The outputs are measured one at a time with one input transition per measurement.
E. t
PLZ
and t
PHZ
are the same as t
dis
.
F. t
PZL
and t
PZH
are the same as t
en
.
G. t
PLH
and t
PHL
are the same as t
pd
.
Figure 1. Load Circuit and Voltage Waveforms
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