winbond ISD1810 Technical data
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Single-Chip, Single-Message Voice Record/Playback
Device 8- to 16-Second Durations
GENERAL DESCRIPTION
Information Storage Devices’ ISD1810 ChipCorder
provides high-quality, single-chip, single-message,
record/playback solution with user-selectable durations of 8 to 16 seconds. The CMOS devices include an on-chip oscillator (w ith extern al contro l),
microphone preamplifier, automatic gain control, anti-aliasing filter, multilevel storage array,
smoothing filter, and speaker amplifier. A minimum record/playback subsystem can be conf igured with a microphone, a speaker, several
passive components, two push-buttons, and a
power source.
ISD1810
Advance Information
®
Recordings are stored in on-chip nonvolatile memory cells, providing zero-power message storage.
This unique, single-chi p solution is ma de possible
through ISD’s patented mu ltilevel storage technology.
Voice and audio signals are stored directly into
memory in their natural for m, prov iding hig h-qua lity,
solid-state voice reproduction.
Figure: ISD1810 Block Diagram
July 2000
ISD · 2727 North First Street, San Jose, CA 95134 · TEL: 408/943-6666 · FAX: 408/544-1787 · http://www.i sd.com
ISD1810 Product
FEATURES
• Easy-to-use single-chip, single-message voice
record/playback solution
• High-quality, natural voice/au dio reproduction
• Push-button interface
– Playback can be edge- or level-
activated
• Variable record/playback duration controlled
by external resistor selection which sets sample
rate.
8 KHz sample rate = 8 seconds
6.4 KHz sample rate = 10 seconds
5.3 KHz sample rate = 12 seconds
4.0 KHz sample rate = 16 seconds
Part
Number
Minimum Duration
(Seconds)
1
• Automatic power-down mode
– Enters standby mode immed iatel y fol-
lowing a record or playback cycle
– 0.5 µA standby current (typical )
• On-chip 8 9 speaker driver
• Zero-power mess ag e storage
– Eliminates battery backup circu i ts
• 100-year message retention (typical)
• 10,000 record cycles (typical)
• On-chip oscillat or
• No algorithm development required
• Single +3 volt power supply
• Available in die form and 28-pin 600 mil DIP
(for sampling only)
Maximum Input Sample Rate
(KHz)
1
Typical Filter Upper
Pass Band (KHz)
1
ISD1810 10 6.4 2.6
NOTE A resistor va lue o f 10 0 K9 at the ROSC pin provides this specified duration. Only this duration is
guaranteed and tested.
ii
Voice Solutions in Silicon
™
Table of Contents
DETAILED DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Speech/Sound Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
NONVOLATILE Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Automatic Power-Down Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PIN DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Voltage Supplies (V
Ground Supplies (V
Record (REC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Playback, Edge-Activated (PLAYE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Playback, Level-Activated (PLAYL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Record LED Output (RECLED
Microphone Input (MIC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Microphone Reference (MIC REF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Automatic Gain Control (AGC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Speaker Outputs (SP+, SP–) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
External Clock (XCLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Resistor Controlled Oscillator (R OSC ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Feed Through (FT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CCA
SSA
, V
, V
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CCD
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SSD
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FUNCTIONAL DESCRIPTION EXAMPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
TIMING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PHYSICAL DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ISD
iii
ISD1810 Product
DETAILED DESCRIPTION
SPEECH/SOUND QUALITY
ISD’s patented ChipCorder technology provides
natural record and playback. The input voice signals
are stored directly in nonvolat ile cells and are reproduced without th e synthetic effect often heard
with digital solid-state speech solutions. A compl ete
sample is stored in a single cell, minimizing the memory necessary to store a single message.
DURATION
The ISD1810 devices offer single-chip solutions
with 8 to 16 seconds of record/playback duration
capacity. Sampling rat e and duration are deter mined by an external resistor connected to the
ROSC pin. These specifications apply with the required resistor value for 10-second minimum playback duration.
NOTE
NONVOLATILE STORAGE
One of the benefits of ISD’s ChipCorder technology
is the use of on-chip nonvolatil e mem or y , p ro vid ing
zero-power message storag e. Th e message is re tained for up to 100 years without power. In addition, the device can be re-recorded typically over
10,000 times.
BASIC OPERATION
The ISD1810 ChipCorder de vice is controlled by
the REC pin, and either of two playback pins,
PLAYE (edge-activated playback), and PLAYL (level-activated playback). The ISD1810 parts are
configured for design simplicity in a single-message application. Dev ice operation is explained
on “Functional Description Example” on page 6.
Only the 10 second duration is guaranteed
and tested.
AUTOMATIC POWER-DOWN MODE
At the end of a playback or record cycle, the
ISD1810 device automatically returns to a lowpower standby mode, consuming typically
0.5 µA, provide d that Play REC, XCLK, and FT pins
are LOW (see DC parameters). During a p lay bac k
cycle, the device power s down automatical ly at
the e nd of th e messa ge. Du ring a record cycle,
the device powers down immediately after R EC is
released LOW.
PIN DESCRIPTIONS
VOLTAGE SUPPLIES (V
Analog and digital circuits internal to the ISD1810
device use separate power buses to minimize
noise on the chip. These power buses are brought
out to separate pins on the pa ckage and should
be tied together as close to th e supply as p ossible. It is important that the power supply be decoupled as close as possible to the package.
GROUND SUPPLIES (V
Similar to V
circuits internal to the ISD1810 device use separate ground buses to minimize noise. These pins
should be tied together as close as possible to the
device.
CCA
RECORD (REC)
The REC input is an active-HIGH record signal. The
device records whenever REC is HIGH. This pin
must remain HIGH for the duration of the recording. REC takes p recedence ov er either playback
(PLAYL or PLAYE) signal. If REC is pulled HIGH during
a playback cycle, the playback immediately
ceases and recording begins.
NOTE
The REC s ignal is intern ally de bounc ed on
the rising edge to prevent a false re-triggering
from a push-button switch.
CCA
SSA
and V
, V
)
CCD
, V
)
SSD
, the analog and dig ital
CCD
ISD
1
ISD1810 Product
A record cycle is completed when R EC is pulled
LOW. An end-of-message (EOM) marker is internally
recorded, enabling a subsequent playback cycle
to terminate appropriately. The device automatically pow e rs do wn to st and b y mo de when RE C go es
LOW. This pin has an internal pull-down device.
Holding this pin HIGH will increase standby current
consumption.
PLAYBACK, EDGE-ACTIVATED (PLAYE)
When a HIGH-going tr ansition is detecte d on this
input pin, a playback cycle begins. Playback continues until an End-of-Message (EOM) marker is encountered or the end of the memory space is
reached. Upon complet ion of the playback cycle, the device automati cally powers down into
standby mode. Taking PLAYE LOW during a pl ayback cycle will not terminate the current cycle.
This pin has an int er n al pu ll-down device. Holding
this pin HIGH will increase standby current consumption.
PLAYBACK, LEVEL-ACTIVATED (PLAYL)
When this i nput p in tr ansi tions fro m LOW to HI GH, a
playback cycle is initiated. Playback continues
until PLAYL is pulled LOW, an end-of-message
marker is detected, or the end of the memory
space is reached. The device automatically powers
down to standby mode upon completion of the
playback cycle. This pin has an internal pull-down
device. Holding this pin HIGH will increase standby
current consumption.
preamplifier. An e xternal microphone should be
AC coupled to this pi n via a ser ies cap aci tor. T he
capacitor value, together with the internal 10KΩ
resistance on this pin, determine the low-frequency
cutoff for the ISD1810 passband.
MICROPHONE REFERENCE (MIC REF)
The MIC REF input is th e inverting input to the mi crophone preampl ifier. This provi des input noisecancellation, or common-mode rej ection, when
the microphon e is c onn ected d iffe ren tial ly to th e
device.
Figure 1: ISD1810 Pinouts—For Sampling
Only
RECORD LED OUTPUT (RECLED)
The RECLED output i s LOW d uring a recor d cycle .
It can be used to drive an LE D to provide feedback that a record cycle is in progress. In addition,
RECLED
pulses LOW momentarily when an end-ofmessage or end-of-memory marker is encountered in a playback cycle.
MICROPHONE INPUT (MIC)
The microphone input transfers its signal to the onchip preamplifier. An on-chip Automatic Gain
Control (AGC) circuit controls the gain of the
2
NOTE:
NC means must Not Connect.
AUTOMATIC GAIN CONTROL (AGC)
The AGC dynamically adjusts the gain of the
preamplifier to compensate for the wide range of
microphone input levels. The AGC allows the full
range of sound, from whispers to loud sounds, to
be recorded with minimal distortion. Nominal values of 4.7 µF give sat isfactory r esults in most cases.
Voice Solutions in Silicon
™
ISD1810 Product
SPEAKER OUTPUTS (SP+, SP–)
The SP+ and SP– pins provide direct drive for loudspeakers with impedances as low as 8 Ω. A sin gle
output may be used, but, for direct-drive loudspeakers, the two opposite-polarity outputs provide an im provemen t in out put power of up t o fo ur
times over a single-ended connection. Furthermore,
when SP+ and SP– are used , a speaker co upling
capacitor is not required. A single-ended connection will require an AC-coupling capacitor between the SP pin and the speaker.
The SP+ pin and the SP– pin are internally connected
through a 50 KΩ resistance. When not in playback
mode, they are floating.
EXTERNAL CLOCK (XCLK)
The external clock inp ut for the ISD1810 devices
has an internal pull- down resistor. This pin is used
for test purposes only. Do not bond this pad.
RESISTOR CONTROLLED OSCILLATOR (ROSC)
The resistor contr olled osc illato r input enabl es the
user to vary the ISD1810 devi ce record and play back duration. The resistor connected between
the ROSC pin and V
frequency and the filter uppe r pass band f or the
ISD1810 device. ISD recommends an ROS C r esi stor value of 100 KΩ.
(R2) determines the sample
SS
SPECIFICATIONS
Table 1: Absolute Maximum Ratings
Condition Value
Junction temperature 150°C
Storage temperature range –65°C to +150°C
Voltage applied to any pad (V
V
– V
CC
SS
Stresses above th ose listed may cause permanent
1.
damage to the device. Exposure to the absolute
maximum ratings may affect device reliability.
Functional operation is not implied at these
conditions.
Table 2: Operating Conditions
Condition Value
Operating temperature range 0°C to +50°C
(1)
CCA
SSA
CC
= V
= V
)
(2)
)
SS
CC
.
CCD
.
SSD
Play voltage (V
Ground voltage (V
Record Supply voltage (V
= V
V
1.
CC
V
= V
2.
SS
– 0.3 V) to
SS
+0.3 V)
(V
CC
–0.3 V to +7.0 V
+2.7V to +4.5V
0 V
)(1+2.7V to 4.5V
1
FEED THROUGH (FT)
Feed Through mode allows use of the speaker
drivers for external signals. The signal between the
MIC and MIC_REF pin s wi ll pass through the AGC ,
the filter and the spea ker drivers to the speaker
outputs SP+ and SP-. The input FT controls the feed
through mode. To operate this mode, t he control
pins REC, PLAYE and PLAYL are held low at VSS. The
pin FT is held high to VCC. For normal operatio n of
record, pl ay and pow er do wn, th e FT pin is held at
VSS. The FT pin has a weak pull down to VSS.
ISD
3
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