User Guide

72
S-301
LC72720NM (IC506: 1U-3694)
NJM2596 (IC509: 1U-3695)
QT240 (IC306: 1U-3681)
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
Vref
MPXIN
Vdda
Vssa
FLOUT
CIN
T1
T2
T3 (RDCL)
T4 (RDDA)
T5 (RSFT)
XOUT
SYR
CE
DI
CL
DO
RDS-ID
SYNC
T7 (CORREC/ARI-ID/BEO)
T6 (ERROR/57K/BE1)
Vssd
Vddd
XIN
REFERENCE
VOLTAGE
ANTIALIASING
FILTER
57kHz
BPF
(SCF)
SMOOTHING
FILTER
PLL
(57kHz)
CLOCK
RECOVERY
(1167.5Hz)
RAM
(24 BLOCK DATA)
ERROR CORRECTION
(SOFT DECISION)
DATA
DECODER
SYNC/EC CONTROLLER
CCB
TEST
VREF
VREF
MEMORY CONTROL
OSC/DIVIDER
SYNC
DETECT-1
SYNC
DETECT-2
CLK(4.332MHz)
FLOUT
CIN
Vdda
Vssa
MPXIN
DO
CL
DI
CE
T1
T2
T3 T7
XIN XOUT
Vddd
Vssd
RDS-ID
SYNC
SYR
112
1324
SNS1
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
SNS1K
OUT1
OUT2
VSS
OUT3
SS/SYNC
n.c.
OSC
OUT4
/RES
VDD
SNS4
SNS4K
SNS3K
SNS3SNS2K
QT240
20-SSOP
SNS2
10
19
20
n.c. n.c.
Sense pin (to Cs3, electrode); OPT1SNS3K20
Sense pin (to Rs3 + Cs3)SNS319
Sense pin (to Cs4, electrode); OPT2SNS4K18
Sense pin (to Rs4 + Cs4)SNS417
Ground or no connectVSS16
Oscillator bias inOSC15
Power: +4.0 to +5V locally regulatedVDD14
Reset pin, active low. Can usually tie to Vdd./RES13
Output, key 4OUT412
Unbonded internallyn.c.11
Unbonded internallyn.c.10
Sync in and/or spread spectrum driveSYNC/SS9
GroundVSS8
Output, key 3OUT37
Output, key 2OUT26
Output, key 1OUT15
Sense pin (to Cs1, electrode); speed optionSNS1K4
Sense pin (to Rs1 + Cs1)SNS13
Sense pin (to Cs2, electrode)SNS2K2
Sense pin (to Rs2 + Cs2)SNS21
DescriptionNamePin