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Ordering number : N5288A
Monolithic Linear IC
LA7337
SECAM-Format VCR Chroma Signal-Processing Circuit
Overview
The LA7337 is an IC that implements SECAM-format VCR signal processing in a single chip. It incorporates band-pass filters and a SECAM discrimination circuit on chip and features automatic adjustment of the bell filter for a reduced number of external components and adjustmentfree circuit operation.
Package Dimensions
unit: mm
3063-DIP28S
[LA7337]
Features
* All required filters, except for the bell filter, incorporated on chip. * Automatic adjustment of the bell filter f0 parameter * Built-in SECAM discrimination circuit
Functions
*4.3-MHz and 1.1-MHz band-pass filters, limiter, AGC (in playback mode) * Divide-by-four circuit, 4x frequency multiplier circuit, 2.2-MHz band-pass filter * Bell filter f 0 automatic adjustment circuit, SECAM discrimination circuit * Sync gate
SANYO: DIP28S
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta 70C Conditions Ratings 7 600 -15 to +70 -40 to +150 Unit V mW C C
Operating Conditions at Ta = 25C
Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Ratings 5 4.8 to 5.5 Unit V V
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13097 HA (OT) No. 5288-1/7
LA7337 Operating Characteristics at Ta = 25C, VCC = 5 V
Parameter Record mode current drain 4.3-MHz band-pass filter characteristics (1) 4.3-MHz band-pass filter characteristics (2) Symbol ICCR VF4C GF4L1 Conditions V5 = V6 = 0 V, V16 = 0 V, S27 = composite sync., S15 = color bar signal V6 = 5 V, V16 = 0 V, S27 = composite sync. S15 = sine wave (200 mVp-p, f = 4.286 MHz) As above, except S15 = sine wave (200 mVp-p, f = 1.1 MHz), taking VF4C as the reference (0 dB) As above, except S15 = sine wave (200 mVp-p, f = 2.2 MHz), taking VF4C as the reference (0 dB) As above, except S15 = sine wave (200 mVp-p, f = 7.5 MHz), taking VF4C as the reference (0 dB) V5 = V6 = 0 V, V16 = 0 V, SW21B = on, S15 = sine wave (200 mVp-p, f = 4 to 5 MHz), S27 = composite sync. As above, except V5 = 4 V. V5 = V6 = 0 V, V16 = 0 V, SW21B = on, S15 = sine wave (200 mVp-p, f = FBLR1), S27 = composite sync. As above, except S15 = sine wave (200 mVp-p, f = 3.8 MHz), taking VBLRC as the reference (0 dB) As above, except S15 = sine wave (200 mVp-p, f = 4.8 MHz), taking VBLRC as the reference (0 dB) V5 = V6 = 0 V, S15 = a SECAM color bar signal (variable level), V16 = 0 V, SW21B = on, V23 = 3.4 V, V24 = 3.7 V, S27 = composite sync. SW1 = on, V1 = 5 V, V5 = V6 = 0 V, V16 = 0 V, S21 = sine wave (200 mVp-p, f = 4 to 5 MHz), SW21A = SW21B = on, S27 = composite sync. As above, except V6 = 4 V SW1 = on, V1 = 5 V, V5 = V6 = 0 V, V16 = 0 V, S21 = sine wave (200 mVp-p, f = FEQR1 x 4), SW21A = SW21B = on, S27 = composite sync. As above, except S21 = sine wave (200 mVp-p, f = 3.8 MHz), taking VEQRC as the reference (0 dB) As above, except S21 = sine wave (200 mVp-p, f = 4.8 MHz), taking VEQRC as the reference (0 dB) SW1 = on, V1 = 5 V, V5 = V6 = 0 V, V16 = 0 V, S15 = sine wave (200 mVp-p, f = 4.4 MHz), SW21B = on, S27 = composite sync. As above, except measure the 2.2 MHz component in the T11 signal. Taking VOR as the reference (0 dB). As above, except measure the 3.3 MHz component in the T11 signal. Taking VOR as the reference (0 dB). V5 = V6 = 0 V, V16 = 5 V, S27 = composite sync., S13 = sine wave (50 mVp-p, f = 1.0715 MHz) V6 = 5 V, SW8B = on, V16 = 5 V, S27 = composite sync., S13 = sine wave (50 mVp-p, f = 1.0715 MHz) As above, except S13 = sine wave (100 mVp-p, f = 1.0715 MHz) Taking VAGC as the reference (0 dB). As above, except S13 = sine wave (25 mVp-p, f = 1.0715 MHz) Taking VAGC as the reference (0 dB). V6 = 5 V, SW14 = on, V14 = V14R, S13 = sine wave (50 mVp-p, f = 500 kHz), V16 = 5 V, S27 = composite sync., taking VAGC as the reference (0 dB). As above, except S13 = sine wave (50 mVp-p, f = 2.2 MHz) Taking VAGC as the reference (0 dB). As above, except S13 = sine wave (50 mVp-p, f = 3.3 MHz) Taking VAGC as the reference (0 dB). 60 4.243 4.493 200 Ratings min 50 145 typ 70 180 -30 max 90 215 -20 Unit mA mVp-p dB
4.3-MHz band-pass filter characteristics (3)
GF4L2
-10
-5
dB
4.3-MHz band-pass filter characteristics (4)
GF4H
-30
-20
dB
Record mode bell filter center frequency (1) Record mode bell filter center frequency (2) Record mode bell filter characteristics (1)
FBLR1 FBLR2 VBLRC
4.286 4.536 250
4.329 4.579 300
MHz MHz mVp-p
Record mode bell filter characteristics (2)
GBLRL
-14
-11
-8
dB
Record mode bell filter characteristics (3)
GBLRH
-14
-11
-8
dB
Record mode killer operating level
GKLR
-28
-23
-18
dB
Record equalization center frequency (1) Record equalization center frequency (2) Record equalization characteristics (1) Record equalization characteristics (2) Record equalization characteristics (3) Record chrominance signal output level Record chrominance signal output unnecessary spectrum (1) Record chrominance signal output unnecessary spectrum (2) Playback mode current drain
FEQR1 FEQR2 VEQRC GEQRL GEQRH VOR
1.0608 1.0788 65 8 8 80
1.0715 1.0895 85 11 11 110
1.0822 1.1002 105 14 14 140
MHz MHz mVp-p dB dB mVp-p
GSR1
-30
-20
dB
GSR2
-30
-20
dB
ICCP
80
100
mA
AGC control characteristics (1)
VAGC
90
120
150
mVp-p
AGC control characteristics (2)
GAGC1
-1
0
+1
dB
AGC control characteristics (3)
GAGC2
-1
0
+1
dB
1.1-MHz band-pass filter characteristics (1)
GF1L
-3
0
+3
dB
1.1-MHz band-pass filter characteristics (2)
GF1H1
-30
-20
dB
1.1-MHz band-pass filter characteristics (3)
GF1H2
-35
-25
dB
Continued on next page.
No. 5288-2/7
LA7337
Continued from preceding page.
Parameter Symbol Conditions V6 = 0 V, SW8B = on, SW14 = on, V14 = V14R, S13 = sine wave (50 mVp-p, f = 1 to 1.2 MHz), V16 = 5 V, S27 = composite sync. As above, except V6 = 4 V V6 = 0 V, SW8B = on, SW14 = on, V14 = V14R, S13 = sine wave (50 mVp-p, f = FEQP1), V16 = 5 V, S27 = composite sync. As above, except S13 = sine wave (50 mVp-p, f = 950 kHz), taking VEQP as the reference (0 dB). As above, except S13 = sine wave (50 mVp-p, f = 1.2 MHz), taking VEQP as the reference (0 dB). SW1 = on, V1 = 5 V, V5 = V6 = 0 V, SW8A = SW8B = on, V16 = 5 V, S27 = composite sync., S8 = sine wave (200 mVp-p, f = 1 to 1.2 MHz), As above, except V5 = 4 V SW1 = on, V1 = 5 V, V5 = V6 = 0 V, SW8A = SW8B = on, S8 = sine wave (200 mVp-p, f = FBLP x 1/4), V16 = 5 V, S27 = composite sync. As above, except S8 = sine wave (200 mVp-p, f = 950 kHz), taking VBLPC as the reference (0 dB). As above, except S8 = sine wave (200 mVp-p, f = 1.2 MHz), taking VBLPC as the reference (0 dB). SW1 = on, V1 = 5 V, V5 = V6 = 0 V, V16 = 5 V, S13 = sine wave (200 mVp-p, f = 1.1 MHz), SW8B = on, S27 = composite sync. As above, except measure the 2.2 MHz component in the T17 signal. Taking VOP as the reference (0 dB). As above, except measure the 3.3 MHz component in the T17 signal. Taking VOP as the reference (0 dB). f = 4.433619 MHz 100 1.8 SW1 = on, V1 = 5 V, V5 = V6 = 0 V, V16 = 0 V, S15 = sine wave (200 mVp-p, f = 4.286 MHz), SW21B = on, S27 = composite sync. As above, except SW2 = on As above -0.3 1.5 4.5 10 SW1 = on, V5 = V6 = 0 V, SW8B = on, S13 = sine wave (50 mVp-p, f = 1.0715 MHz), V16 = 5 V, S27 = composite sync. As above V5 = 0 V, V6 = 5 V, SW21B = on, V16 = 0 V, S27 = composite sync. As above SW25 = on, V25 = 5 V V5 = V6 = 0 V, V16 = 0 V, SW21B = on, S27 = composite sync., S15 = SECAM color bar signal As above, except S15 = PAL color bar signal 1.5 4.5 6.0 2.0 7 4.5 Ratings min typ max Unit
Playback equalization center frequency (1)
FEQP1
1.0608
1.0715
1.0822
MHz
Playback equalization center frequency (2)
FEQP2 VEQPC
1.0788
1.0895
1.1002
MHz
Playback equalization characteristics (1)
120
150
180
mVp-p
Playback equalization characteristics (2)
GEQPL
-14
-11
-8
dB
Playback equalization characteristics (3)
GEQPH
-14
-11
-8
dB
Playback bell center frequency (1)
FBLP1
4.243
4.286
4.329
MHz
Playback bell center frequency (2)
FBLP2 VBLPC
4.493
4.536
4.579
MHz
Playback bell characteristics (1)
65
85
105
mVp-p
Playback bell characteristics (2)
GBLPL
8
11
14
dB
Playback bell characteristics (3)
GBLPH
8
11
14
dB
Playback chrominance signal output level
VOP
130
160
190
mVp-p
Playback chrominance signal output unnecessary spectrum (1) Playback chrominance signal output unnecessary spectrum (2) CLK input level Synchronizing signal input threshold level Record mode sync gate start time (muting off) Record mode sync gate start time (muting on) Record mode sync gate release time Record mode mute setting resistance Playback mode sync gate start time Playback mode sync gate release time BGP start time BGP amplitude SECAM discriminator output resistance Record mode SECAM discriminator characteristics (1) Record mode SECAM discriminator characteristics (2)
GSP1
-25
-15
dB
GSP2 VCLK VTHS TRGB TRGBM TRGE VTSP2 TPGB TPGE TBGB TBGW R26 VSCMR1
-20 200 2 +0.2 2 5.0 20 2 5.0 6.5 2.5 10
-10 800 2.2 +0.7 2.5 5.5 30 2.5 5.5 7.0 3.0 13
dB mVp-p V s s s k s s s s k V
VSCMR2
0.5
V
Continued on next page.
No. 5288-3/7
LA7337
Continued from preceding page.
Parameter Playback mode phase detector output difference voltage (1) Playback mode phase detector output difference voltage (2) Playback mode SECAM discriminator characteristics (1) Playback mode SECAM discriminator characteristics (2) SECAM discriminator comparator threshold voltage Record/playback control threshold voltage Forced SECAM mode threshold voltage Symbol Conditions V5 = V6 = 0 V, SW8B = on, V16 = 5 V, S27 = composite sync., S13 = sine wave (50 mVp-p, f = 1.0625/1.1016 MHz) As above, except S13 = sine wave (50 mVp-p, f = 627 kHz) V16 = 5 V, SW23 = SW24 = On V16 = 5 V, SW23 = SW24 = On SW25 = On 3.2 2.3 V16 = 0 V, SW25 = on, V25 = 3 V, S27 = composite sync., S15 = sine wave (200 mVp-p, f = 4.286 MHz) V16 = 0 V, SW25 = on, V25 = 4 V, S27 = composite sync., S15 = sine wave (200 mVp-p, f = 4.286 MHz) 1 4.1 4.3 4.5 3.5 2.5 4.5 0.5 3.8 2.7 4 Ratings min 150 typ 180 max Unit
VSCPD1 VSCPD2 VSCMP1 VSCMP2 VTCOMP VTRP VTHSM
mV
100
mV V V V V V
Forced mute mode threshold voltage Reference voltage
VTHMM VREG
V V
Standard Input Signal Levels
REC-IN (pin 15) PB-IN (pin 13) The 200 mVp-p ID component 50 mVp-p
Internal filter group delay times (reference values)
1.1 MHz BPF 2.2 MHz BPF 4.3 MHz BPFA 4.3 MHz BPFB 460 ns (PB) 430 ns (REC) 180 ns 230 ns 170 ns
[Record/playback mode settings] Pin 16 = low record mode Pin 16 = high playback mode [Bell filter offset adjustment] Increasing the pin 6 voltage increases the 1.1-MHz bell filter center frequency (f0). Increasing the pin 5 voltage increases the 4.3-MHz bell filter center frequency (f0). [Test mode settings] The IC enters test mode if pin 6 is set to 5 V. The pin 5, 11, 17, and 26 outputs behave as follows in this mode. Pin 5: The 4.43-MHz VCO output appears (However, note that a load of about 1 k is required between this pin and VCC.) Pin 11: The 1.1-MHz band-pass filter output appears. Pin 17: The 4.3-MHz band-pass filter output appears. Pin 26: The BGP (used for SECAM discrimination, playback AGC, and record killer) can be monitored. [Muting control table]
Voltage applied to pin 1 4 V or higher Open 1 V or lower Output signal mode (pins 17 and 11) Forced SECAM AUTO (Uses the output of the internal discriminator) Forced mute mode
No. 5288-4/7
LA7337 Block Diagram
No. 5288-5/7
LA7337 Test Circuit Diagram
Note: Use an FET probe when measuring T8, T21, and BGP.
No. 5288-6/7
LA7337 Test Circuit Diagram
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of January, 1997. Specifications and information herein are subject to change without notice. No. 5288-7/7

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