Harman Kardon DVD 29 Service Manual ▷ View online
SN74LVC157A
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
SCAS292G – JANUARY 1993 – REVISED OCTOBER 1998
1
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
D
EPIC
(Enhanced-Performance Implanted
CMOS) Submicron Process
D
Typical V
OLP
(Output Ground Bounce)
< 0.8 V at V
CC
= 3.3 V, T
A
= 25
°
C
D
Typical V
OHV
(Output V
OH
Undershoot)
> 2 V at V
CC
= 3.3 V, T
A
= 25
°
C
D
Inputs Accept Voltages to 5.5 V
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D
Latch-Up Performance Exceeds 250 mA Per
JESD 17
JESD 17
D
Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
Small-Outline (D), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
This quadruple 2-line to 1-line data selector/multiplexer is designed for 1.65-V to 3.6-V V
CC
operation.
The SN74LVC157A features a common strobe (G) input. When the strobe is high, all outputs are low. When
the strobe is low, a 4-bit word is selected from one of two sources and is routed to the four outputs. The device
provides true data.
the strobe is low, a 4-bit word is selected from one of two sources and is routed to the four outputs. The device
provides true data.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
in a mixed 3.3-V/5-V system environment.
The SN74LVC157A is characterized for operation from –40
°
C to 85
°
C.
FUNCTION TABLE
INPUTS
OUTPUT
G
A/B
A
B
Y
H
X
X
X
L
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
Copyright
1998, 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.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A/B
1A
1B
1Y
2A
2B
2Y
GND
V
CC
G
4A
4B
4Y
3A
3B
3Y
D, DB, OR PW PACKAGE
(TOP VIEW)
harman/kardon
DVD 29/230 Service Manual
Page 25 of 55
www.fairchildsemi.com
2
7
4
VH
C04
Logic Symbol
IEEE/IEC
Pin Descriptions
Connection Diagram
Truth Table
Pin Names
Description
A
n
Inputs
O
n
Outputs
A
O
L
H
H
L
harman/kardon
DVD 29/230 Service Manual
Page 26 of 55
AM5888S
Motor Driver ICs
A
A
M
M
t
t
e
e
k
k
S
S
E
E
M
M
I
I
C
C
O
O
N
N
D
D
U
U
C
C
T
T
O
O
R
R
S
S
F
F
e
e
b
b
2
2
0
0
0
0
5
5
V
V
1
1
.
.
2
2
- 4 -
Pin configuration
VOSL-
MUTE
VINTK
VCTL
Vcc2
VOLD-
VOLD+
TRB_2
NC
VINLD
VOTK-
VOTK+
VINFC
TRB_1
FWD
VOSL+
VOFC+
VOFC-
GND
NC
BIAS
15
16
17
18
19
20
21
REGO 2
VINSL+
REGO 1
REV
Vcc1
VOTR-
VOTR+
22
23
24
25
26
27
14
12
11
10
9
7
6
5
4
3
2
1
8
13
28
AM5888S
harman/kardon
DVD 29/230 Service Manual
Page 27 of 55
AM5888S
Motor Driver ICs
A
A
M
M
t
t
e
e
k
k
S
S
E
E
M
M
I
I
C
C
O
O
N
N
D
D
U
U
C
C
T
T
O
O
R
R
S
S
F
F
e
e
b
b
2
2
0
0
0
0
5
5
V
V
1
1
.
.
2
2
- 5 -
Pin description
PIN No
Pin Name
Function
1
VINFC
Input for focus driver
2
TRB_1
Connect to external transistor base
3
REGO2
Regulator voltage output, connect to external transistor collector
4
VINSL+
Input for the sled driver
5
REGO1
Regulator voltage output, connect to external transistor collector
6
FWD
Tray driver forward input
7
REV
Tray driver reverse input
8
Vcc1
Vcc for pre-drive block and power block of sled and tray
9
VOTR-
Tray driver output (-)
10
VOTR+
Tray driver output (+)
11
VOSL+
Sled driver output (+)
12
VOSL-
Sled driver output (-)
13
VOFC-
Focus driver output (-)
14
VOFC+
Focus driver output (+)
15
VOTK+
Tracking driver output (+)
16
VOTK-
Tracking driver output (-)
17
VOLD+
Spindle driver output (+)
18
VOLD-
Spindle driver output (-)
19
Vcc2
Vcc for power block of spindle, tracking and focus
20 NC
No
Connection
21
VCTL
Speed control input of tray driver
22 GND
Ground
23
VINLD
Input for spindle driver
24 NC
No
Connection
25
TRB_2
Connect to external transistor base
26
VINTK
Input for tracking driver
27
BIAS
Input for reference voltage
28
MUTE
Input for mute control
Notes) Symbol of + and – (output of drivers) means polarity to input pin.
(For example, if voltage of pin1 is high, pin14 is high.)
harman/kardon
DVD 29/230 Service Manual
Page 28 of 55
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