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TA8720AN
AV SWITCH FOR COLOR TV WITH S-TERMINAL
TOSHIBA TA8720AN
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8720AN
AV SWITCH FOR COLOR TV WITH S-TERMINAL
The TA8720AN is an IC used for switching of 4-inputs 3
circuits of sound (L, R) and video signals.
FEATURES
lt Audio section (2 channels for a STEREO signal)
Inputs : Three inputs for external signals
An input for an internal TV signal
Outputs : A switched and selected output
Sound Mute SDIP30-P-400-1.78
0 Video section Weight : 1.999 (Typ.)
Inputs : Two inputs for external signal (Sync negative)
. YC inputs for S-VHS
An input for and internal TV signal
(Sync negative or positive)
Outputs : Monitor output
(YC MIX circuit for S-VHS is built-in)
Y signal output
Chroma signal output
1 2001-06-25
TOSHIBA
TA8720AN
BLOCK DIAGRAM
Monitor Output
TV L Input o-n-C; Clamp -Ci0)"""'""s'-''"'""" (2Vp-p)
eds v (2)
TV R mputo-er-(i. (8dB) D CC COMB
VCC Filter
TV Input
o-u-iS - wo D VCC (1)
(1Vp-p) es-l'-,"'"
l _2.0 N .
S-VHS L Input o-o-G) I I ii) Gain sw
r -- - J I
s VHS R Input o-o-G) I r----" 26 r,o',,'tnput GND(or OPEN)
I I ". 6dB
I “B l s I 2 T Cl v :8di?
S-VHS Video Input .. {a I I ' ' fi), am? CC .
.. v I I ey tt E
(ll/p-p) I I I
I f-- --d
TV Polarity I I Video (Y) Input
GND : Positive C _____I t (iF-""'''''-"""'
VCC : Negative I -6dB 2V
I ( p-p)
I 6dB I l, it, T ov-rv
S-VHS Chroma InputC " (is.?, I . " - #3 Mode Output 2V-EI, E2
.OT I I s JC'- 4V-S-VHS
s ' - "-4
w"- -----e ---*
L Input (1)t:y-(ii. 1“, L. t " n D L Output
-''2 -ooT I Y,
R Input (1)0 L' (iii 1 iss, I a\c I D R Output
_.02 - ---f "
l l Ch
. I l C% roma
External Video cr-n-tfi) I I {0/ Take Off Output
Input (1) I l
L In ut (2) cr-, 12 I I Ci9)'a'"'-t
p '-((i I I
I I (2Vp-p) Video
R Input (2) o-er-tCi I I f,1j.sh, Delay Line - (y)
I I Output
External Video o-o-li? I 1. ------------- ED Mute
Input (2) I
sw (1) (ii Decoder G) sw (2)
2 2001 -06-25
TOSHIBA TA8720AN
TERMINAL INTERFACE CIRCUIT
Pin2, 4,5, 9,10, 12,13 are same. Pin8 is same.
ZOkQ ZOkQ
15k§2 ZOkO
Pin 22 is same.
Pin 26 is same.
500 (iii)
SI g E, z:
3 2001-06-25
TOSHIBA
TA8720AN
MAXIMUM RATINGS (Ta =25°C) LOGIC TABLE
CHARACTERISTIC SYMBOL RATING UNIT SIM? [PIN 15]
HIGH LOW
Power Supply Voltage VCC max 15 V LEVEL LEVEL
Input Terminal Signal . HIGH
Voltage em max 3 Vp-p SW1 LEVEL TV E1
Input Terminal Voltage Vin max GND-th31r'-Vcc+0.3V - [PIN15] LOW S-VHS E2
Power Dissipation PD max 1.6 (Note) W LEVEL
Operating Temperature Top, -20-65 "C
Storage Temperature Tstg -55--150 "C
(Note) When using the device at above Ta =25°C, decrease the power dissipation by
12.8mW for each increase of 1°C.
RECOMMENDED POWER SUPPLY VOLTAGE
my PIN NAME MIN. TYP. MAX. UNIT
2: 9V Power Supply (Vcc) 8.1 9.0 9.9 V
TOSHIBA TA8720AN
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS (Unless otherwise specified, Vcc=9V, Ta =25°C)
DC voltage characteristic
2ll PIN NAME SYMBOL MIN. TYP. MAX. UNIT NOTE
1 TV L Input V1 5.2 5.7 6.2
2 TV R Input V2 5.2 5.7 6.2
3 TV Input V3 5.1 5.6 6.1
4 S-VHS L Input V4 5.2 5.7 6.2
5 S-VHS R Input V5 5.2 5.7 6.2
6 S-VHS Video Input V6 5.0 5.5 6.0
7 TV Polarity Switch V7 - - -
8 S-VHS Chroma Input V8 5.0 5.5 6.0
9 L Input (1) V9 5.2 5.7 6.2
10 R Input (1) V10 5.2 5.7 6.2
11 (E1x)terna| Video Input V11 5.0 5.5 6.0
12 L Input (2) V12 5.2 5.7 6.2
13 R Input (2) V13 5.2 5.7 6.2
14 f:)terna| Video Input V14 5.0 5.5 6.0
15 Switch (1) V15 - - - V -
16 Switch (2) V16 - - -
17 Mute V17 - - -
18 Video (Y) Output V18 3.5 4.0 4.5
19 GND V19 - - -
20 Chroma Output V20 3.5 4.0 4.5
21 R Output V21 3.8 4.3 4.8
22 L Output V22 3.8 4.3 4.8
23 Mode Output V23 1.5 2.0 2.5
24 Video (Y) Input V24 5.0 5.5 6.0
25 Clamp V25 2.6 3.1 3.6
26 Chroma Input V26 5.0 5.5 6.0
27 Gain Switch V27 - - -
28 Vcc (1) V28 - VCC -
29 VCC (2) V29 VCC
30 Monitor Output V30 2.4 2.9 3.4
TOSHIBA TA8720AN
Supply current
CHARACTERISTIC SYMBOL MIN. TYP. MAX. UNIT NOTE
Supply Current (Pin 28 : VCC1) 'CC1 4.0 6.0 9.0
Supply Current (Pin 29 : Vcc2) Iccz 14 21 31 mA
Total Supply Current Ict: 18 27 40
(Icc1 + ICE)
Input resistance
KIT PIN NAME SYMBOL MIN. TYP. MAX. UNIT NOTE
3 TV Input R3
6 S-VHS Video Input R6
8 S-VHS Chroma Input R8
11 External Video Input R11
(1) 10 15 21 Supply an external
14 fgternal Video Input R14 voltage which is 0.5V
24 Video (Y) Input R24 Cethaearet.han open
26 Chroma Input R26 km g . .
1 TV L Input R1 Measure the flow-in
2 TV R Input R2 EZIZETSE the resistor
4 S-VHS L Input R4
5 S-VHS R Input R5 48 70 98 value.
9 L Input (1) R9
10 R Input (1) R10
12 Llnput R12
13 R Input R13
Output resistance
Kl"? PIN NAME SYMBOL MIN. TYP. MAX. UNIT NOTE
18 Video (Y) Output R18 - 100 - Measure the terminal
20 Chroma Output R20 - 100 - n voltage variation when
21 R Output R21 the flow-in current is
22 L Output R22 - 130 - 100PA. .
23 Mode Output R23 - 11 - kt) Calculate the resistor
30 Monitor Output R30 - 70 - n value.
6 2001-06-25
AC CHARACTERISTIC (Unless otherwise specified, Vcc=9V, Ta =25°C)
CHARACTERISTIC
SYMBOL CIR-
CUIT SW9 SW7 SW15$W165W17
TEST CONDITION
Input Dynamic Range
SW 3 :
SW 6 :
Other :
SW 8 :
Other :
SW 11 :
Other :
SW 14 :
Other :
Other :
V2 : 15kHz sine wave
Vary the amplitude of V2.
Measure the amplitude of
V2 when the output
signal of pin 30 is
distorted.
SW 24 :
Other :
SW 26 :
SW 6 :
SW 8 :
Vary the amplitude of V2.
Measure the amplitude of
V2 when the output
signals of pin 18 and 20
are distorted.
TA8720AN - 7
TOSHIBA
TA8720AN
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. wp. MAX. UNIT
cun SW9 SW7 sw1ssw1ssw17 v3 OTHER
SW 3 :
Other : a
SW 6 :
Other :
5‘” 8 1 (1) v2 : 15kHz, 1vp.p
<5V Other: Sine wave 5.0 6.0 7.0
SW 11 :
(2) Measure the pin 30 signal
amplitude for each mode.
SW 14 :
Other :
5V SW 3
Other .
Video Gain — a b a da
SW 3 :
AGV 3 SW 27 Z
(1), (2) Ditto
(3) Calwlate the difference 1.5 2.0 2.5
between GV.
SW 24 :
Other : b
-0.5 0 0.5
Other : . .
a b (2) Measure the pm 30 signal
SW 6 : amplitude for each mode.
5 Other : b
SW 8 :
Other : b
TOSHIBA
TA8720AN - 8
TA8720AN
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
cun SW9 SW7 sw1ssw165w17 v3 OTHER
(1) V2 : 4.43MH2,1Vp.p
sine wave
5w 3’ 5' 8, (2) TV mode
11' 14 SW3 : B
a—)b—>a Measure the output level
Video Cross Talk CM — a a 5V Other : a of pin30 as OdB 50 64 — dB
b reference.
Measure the Output level
of pin 30 when the input
pin change to 6, 8, 11, 14
for each mode.
TOSHIBA
TA8720AN - 9
TA8720AN
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
cun SW9 SW7 sw1ssw1ssw17 v3 OTHER
(1) V2 : 4.43MH2,1vp.p
sine wave
(2) SW24 : b
Measure the output level
of pin 18 as MS
reference.
SW24 Measure the output level
b—>a of pin18 when V2 is
SW26 applied to pin26.
Cross Talk Between Cyc — a a b a SV 50 60 — dB
YC “'3 (3) swzs : b
Other 5 a Measure the output level
of pin 20 as OdB
reference.
Measure the output level
of pin 20 when V2 is
applied to pin24.
a Repeat (1), (2). (3}
TOSHIBA
TA8720AN — 10
TA8720AN
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
cun SW9 SW7 sw1ssw1ssw17 v3 OTHER ,
SW 3 :
a b Gt er (2) v2 : 100m:
SW 8 : Measure the amplitude of
0th : 'n30.
FM e' p' 10 24 —
SW 11 _ (3) Set the frequency of V2
b a Other : at -3dB point.
Read the frequency of V2.
(1) V2 : 1V”, sine wave
Frequency Band — a a a a
SW 3 :
SW 24 :
10 56 —
SW 26 :
Other :
Fvc a b (4) Read the frequency of V2
SW 6 :
(1)~(3) Same as above.
when the outputs are pin
18 and 20.
10 27 —
SW 8 :
TOSHIBA
TA8720AN - 11
TA8720AN
CHARACTERISTIC
SYMBOL CIR-
CU” SW9 SW7 swasswm
TEST CONDITION
MAX. UNIT
Clamp Level
Sound Dynamic
Sound Gain
ad]. ad].
Sound Frequency
Characteristic
SW 3 : b
Other: a
V2 : PAL TV signal
SW3 : a
Measure the voltage (U1)
of pin 30.
SW3 : b
Calculate U1 level (96)
from the sync tip.
SW1, 2, 4,
5, 9, 10, 12,
Other : a
v2 : 1kHz,1Vp.p
sine wave
Measure the amplitude of
V2 when the output
distortion rate reaches
1.5% for each mode (L
and R).
Measure the L and R
output amplitude (ya) for
each mode.
Calculate
GA = 20309 va
0.5 dB
Set the frequency (fA) of
V2 at —3dB point.
Same as above for each
TA8720AN - 1 2
TOSHIBA
TA8720AN
CHARACTERISTIC
SYMBOL
TEST CONDITION
Cross Talk Between
Source
Cross Talk Between
L and R Sound Path
Sound Mute
Attenuation Level
V2 : 1kHz, WW sine
Measure the L and R
output amplitude (0).
Calculate 20109 0.
Measure the R output
ampIitude when the input
channel is L side for each
mode, and vice versa.
SW1. 2 :
Other: a
SW17 : a
Measure the L and R
output amplitude (01).
SW17 : b
Measure the L and R
output amplitude (02).
Calculate 20109 (3—:
TA8720AN - 13
TOSHIBA
TA8720AN
CHARACTE RISTIC
SYMBOL
SW9 sw7 sw15
TEST CONDITION
SW (1)
Threshold Voltage
SW (2)
Threshold Voltage
Vth II
Sound Mute SW
Threshold Voltage
SW 1 1
V2 : IOOkHz, 1Vp_p sine
By increasing the level of
V3, read the voltage
when the output signal
appears on pin 30.
By increasing the {evel of
V3, read the voltage
when the output signal
disappears on pin 30.
By increasing the level of
V3, read the voltage
when the output signal
disappeares on pin 22.
TV Polarity Threshold
Voltage
TA8720AN - 14
TOSHIBA
TA8720AN
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
CUIT SW9 SW7 SW155W165W17 V3 OTHER
SW1, 2, 3
TV Mode ~— b
Other : a
SW 4, 5, 6.
8, 24,
5 Mode — a 26 _ b (1) V2 : 100kHz, Np.p sine
5V Other : a wave _ — — _
(2) Confirm the output signal
appears on pin 18, 20, 21,
22, 23.
SW 9, 10,
E1Mode --— b 11 : b
Other : a
SW12, 13,
E2 Mode — a 14 : b
Other : a
TOSHIBA
TA8720AN - 15
TA8720AN
CHARACTE RISTIC
SYMBOL CIR-
CUIT 5W9 SW7
TEST CONDITION
TV Polarity Inversion
Sound Mute
SW 3: b
Other : a
(1) SW7 : a
Check the signals of V2
and pin 30 are in phase.
(2) SW7 : b
Check the signals of V2
and pin 30 are opposite
phase.
Mode Output Voltage
SW1, 2, 4,
5, 9,10,
Other : a
Check the disappearance on
pin 21, 22 for each mode.
Measure the pin 23 voltage
for each mode.
TA8720AN - 16
TOSHIBA
TA8720AN
TOSHIBA
TA8720AN
TEST CIRCUIT 1
DC CHARACTERISTIC
TEST CIRCUIT 2
AC CHARACTERISTIC
C 'k t U
silt-a- x.,,-,-,'',',,'-) D
C 29 9 0.01/5
. 'l.','-oHi) 29 0.01 F
G: 5; "or-)',',,-,::,': A is
C Drit-a- CLt" IrgFi 3 "sw"',,
C2 26 er. it-u-i, 4 EE_OT
O 3.3 F - 0.01/1F SWZSaOBJ/IF
(ii :isy-'+ilf-t 3m? 5 3+“ bo-
- _ . (f 3.31F
_ ) Q-u-o" 6 D-YC-t
7 TA8720AN D ih01/rF a swzza 0.01%
C C? 24 .o-n'-t
8 D TA8720AN bo
C - x-,-,-,'',',,'-)) D
9 D 0.01/1F a
(ii) D . 0-01/AF asw1o D
® D 0.01 10 21
_ _,_.,b
Ci E8) _-o-i, 12 ipJ-t
_ 0.01/1F
(2 c)- it-u-i, 13 D
0-01/1F bsw14 SW17
SW7 it-s 14 17 too-
t-Ci D-t F-et, ao-t
c tht)1pzF SW16
47m: $-o .ig- 15 16 bo-.
- + . a 'li, t-i, ao-t
3 v3\|
17 2001-06-25
TOSHIBA TA8720AN
PACKAGE DIMENSIONS
SDIP30-P-400-1.78 Unit : mm
F""'1r-nr'"nr'-1rnr-l7nr-"lr"-1f'C1f-lr-lr-1r-nr-1
L_lclclcjcjt_lt_lclr_lclclclL_lclL_l
8.8:02
27.9MAX ,
27.4t0.2
NA tn.--
r Fi 2
_eru st' r
1.254TYP . .1 E -tjClirts?
Weight : 1.99g (Typ.)
18 2001-06-25
TOSHIBA TA8720AN
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA is continually working to improve the quality and reliability of its products.
Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent
electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer,
when utilizing TOSHIBA products, to comply with the standards of safety in making a safe
design for the entire system, and to avoid situations in which a malfunction or failure of such
TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please
keep in mind the precautions and conditions set forth in the "Handling Guide for
Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc..
OThe TOSHIBA products listed in this document are intended for usage in general electronics
applications (computer, personal equipment, office equipment, measuring equipment, industrial
robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor
warranted for usage in equipment that requires extraordinarily high quality and/or reliability or
a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended
Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship
instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA
products listed in this document shall be made at the customer's own risk.
0 The products described in this document are subject to the foreign exchange and foreign trade
OThe information contained herein is presented only as a guide for the applications of our
products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of
intellectual property or other rights of the third parties which may result from its use. No
license is granted by implication or otherwise under any intellectual property or other rights of
TOSHIBA CORPORATION or others.
0 The information contained herein is subject to change without notice.
19 2001-06-25
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