E1466DHO-P8Y

E1466DHO-P8Y Datasheet

The e1466D is an integrated circuit in CMOS Silicon Gate Technology for analog clocks. It consists of a 32-kHz oscillator, frequency divider, output pulse formers and push-pull motor drivers. Integrated capacitors are mask-selectable to accomodate the external quartz crystal. Additional capacitance can be selected through pad bonding for trimming the oscillator frequency.

Part	Datasheet
E1466DHO-P8Y	E1466DHO-P8Y (pdf)

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PDF Datasheet Preview
• 32-kHz Crystal Oscillator • V to V Operating-voltage Range • Integrated Capacitors for Digital Trimming • Suitable for up to pF Quartz • Output Pulse Formers • Mask Options for Motor Period and Pulse Width • Low Resistance Output for Bipolar Stepping Motor • Motor Fast-test Function The e1466D is an integrated circuit in CMOS Silicon Gate Technology for analog clocks. It consists of a 32-kHz oscillator, frequency divider, output pulse formers and push-pull motor drivers. Integrated capacitors are mask-selectable to accomodate the external quartz crystal. Additional capacitance can be selected through pad bonding for trimming the oscillator frequency. 32-kHz Clock CMOS IC with Digital Trimming e1466D Pad Configuration Figure Pinning VDD 1 VSS C4 C3 C2 C1 e1466D OSCIN OSCOUT 1 TEST 2 MOT1 2 MOT2 MOT1 1 The pads VDD and OSCOUT are interchangeable per mask option 2 The pads TEST and MOT1 are interchangeable per mask option Pin Description Name VDD VSS OSCIN OSCOUT MOT1/2 C1, C2, C3, C4 TEST Description Positive supply voltage Negative supply voltage Oscillator input Oscillator output Motor drive outputs Oscillator trimming inputs TEST input/output 2 e1466D e1466D Functional Descripion Oscillator Trimming Capacitors An oscillator inverter with feedback resistor is provided to generate the 32768 Hz clock frequency. Values for the fixed capacitors at OSCIN and OSCOUT are mask-selectable see note 3 of “Operating Characteristics” . Four capacitor pads, C1 to C4, enable the users to add integrated trimming capacitors to OSCIN, providing 15 tuning steps. A frequency variation of typically 4 ppm for each tuning step is obtained by bonding the capacitor pads to OSCIN. As none of these pads are bonded, the IC is in an untrimmed state. Figure 3 shows the trimming curve characteristic. Note For applications which utilize this integrated trimming feature, Atmel will determine optimum val- ues for the integrated capacitors COSCIN and COSCOUT. Capacitor pads C1 to C4 0 = open, 1 = connected to OSCIN Combination C1 + C4 is redundant and therefore eliminated from the list Table Frequency Trimming Table Capacitor Pads Trimming Step Motor Drive Output The e1466D contains two push-pull output buffers for driving bipolar stepping motors. During a motor pulse, the N-channel device of one buffer and the P-channel device of the other buffer will be activated. Both N-channel transistors are on and conducting between output pulses. The outputs are protected against inductive voltage spikes with diodes to both supply pins. The motor output period and pulse width are mask-programmable, as listed below: Available motor periods TM 125, 250, 500 ms and 2, 16 s Available max. pulse widths tM 15, 6, ms and 1 s Available motor periods for motor test TMT 250, 500 ms and 1 s Note The following constraints for combination of motor period and pulse widths have to be consid- ered TM > 4 tM, TMT > 4 tM or alternatively TM = 2 tM, TMT = 2 tM Test Functions For test purposes, the TEST pad is open. With a high resistance probe R 10 MW, C 20 pF , a test frequency fTEST of 128 Hz can be measured at the TEST pad. Connecting TEST for at least 32 ms to VDD changes the motor period from the selected value to TMT mask-selectable while the pulse width remains unaffected. This feature can be used for test- ing the mechanical parts of the clock. Absolute Maximum Ratings Parameters Ordering Information Table Option List e1466Dx Option x Cycle Motor Pulse tM ms Test TMT ms Integrated Capacitance COSCIN 1 COSCOUT 1 2000 1000 500/ 250 Note On-chip stray capacitance included Load Capacitance Option x A AO FO HO Pad 1 Pad 2 Pad 3 OSCIN OSCOUT MOT2 OSCIN OSCOUT MOT2 OSCIN OSCOUT MOT2 OSCIN OSCOUT MOT2 Pad 4 MOT1 Pad 5 MOT1 Pad Designation Pad 6 Pad 7 TEST TEST TEST TEST Pad 8 VDD Pad 8 C4 Pad 10 C3 Pad 11 C2 Pad 12 C1 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 Tel 1 408 441-0311 Fax 1 408 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131 Tel 1 408 441-0311 Fax 1 408 436-4314 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131 Tel 1 408 441-0311 Fax 1 408 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60

PDF Datasheet Preview

• 32-kHz Crystal Oscillator
• V to V Operating-voltage Range
• Integrated Capacitors for Digital Trimming
• Suitable for up to pF Quartz
• Output Pulse Formers
• Mask Options for Motor Period and Pulse Width
• Low Resistance Output for Bipolar Stepping Motor
• Motor Fast-test Function

The e1466D is an integrated circuit in CMOS Silicon Gate Technology for analog clocks. It consists of a 32-kHz oscillator, frequency divider, output pulse formers and push-pull motor drivers. Integrated capacitors are mask-selectable to accomodate the external quartz crystal. Additional capacitance can be selected through pad bonding for trimming the oscillator frequency.
32-kHz Clock CMOS IC with Digital Trimming
e1466D

Pad Configuration

Figure Pinning

VDD 1 VSS

C4 C3 C2 C1
e1466D

OSCIN OSCOUT 1

TEST 2 MOT1 2

MOT2 MOT1
1 The pads VDD and OSCOUT are interchangeable per mask option 2 The pads TEST and MOT1 are interchangeable per mask option

Pin Description

Name VDD VSS OSCIN OSCOUT MOT1/2 C1, C2, C3, C4 TEST

Description Positive supply voltage Negative supply voltage

Oscillator input Oscillator output Motor drive outputs Oscillator trimming inputs TEST input/output
2 e1466D
e1466D

Functional Descripion

Oscillator

Trimming Capacitors

An oscillator inverter with feedback resistor is provided to generate the 32768 Hz clock frequency. Values for the fixed capacitors at OSCIN and OSCOUT are mask-selectable see note 3 of “Operating Characteristics” . Four capacitor pads, C1 to C4, enable the users to add integrated trimming capacitors to OSCIN, providing 15 tuning steps.

A frequency variation of typically 4 ppm for each tuning step is obtained by bonding the capacitor pads to OSCIN. As none of these pads are bonded, the IC is in an untrimmed state. Figure 3 shows the trimming curve characteristic. Note For applications which utilize this integrated trimming feature, Atmel will determine optimum val-
ues for the integrated capacitors COSCIN and COSCOUT.

Capacitor pads C1 to C4 0 = open, 1 = connected to OSCIN

Combination C1 + C4 is redundant and therefore eliminated from the list

Table Frequency Trimming Table

Capacitor Pads

Trimming Step

Motor Drive Output

The e1466D contains two push-pull output buffers for driving bipolar stepping motors. During a motor pulse, the N-channel device of one buffer and the P-channel device of the other buffer will be activated. Both N-channel transistors are on and conducting between output pulses. The outputs are protected against inductive voltage spikes with diodes to both supply pins. The motor output period and pulse width are mask-programmable, as listed below:

Available motor periods TM 125, 250, 500 ms and 2, 16 s

Available max. pulse widths tM 15, 6, ms and 1 s

Available motor periods for motor test TMT 250, 500 ms and 1 s Note The following constraints for combination of motor period and pulse widths have to be consid-
ered TM > 4 tM, TMT > 4 tM or alternatively TM = 2 tM, TMT = 2 tM

Test Functions

For test purposes, the TEST pad is open. With a high resistance probe R 10 MW, C 20 pF , a test frequency fTEST of 128 Hz can be measured at the TEST pad. Connecting TEST for at least 32 ms to VDD changes the motor period from the selected value to TMT mask-selectable while the pulse width remains unaffected. This feature can be used for test-
ing the mechanical parts of the clock.

Absolute Maximum Ratings

Parameters
Ordering Information

Table Option List e1466Dx

Option x

Cycle

Motor

Pulse tM ms

Test

TMT ms

Integrated Capacitance

COSCIN 1

COSCOUT 1
2000
1000
500/ 250

Note On-chip stray capacitance included

Load Capacitance

Option x A AO FO HO

Pad 1 Pad 2 Pad 3 OSCIN OSCOUT MOT2 OSCIN OSCOUT MOT2 OSCIN OSCOUT MOT2 OSCIN OSCOUT MOT2

Pad 4 MOT1

Pad 5 MOT1

Pad Designation

Pad 6 Pad 7

TEST

TEST

TEST

TEST

Pad 8 VDD

Pad 8 C4

Pad 10 C3

Pad 11 C2

Pad 12 C1

Atmel Corporation
2325 Orchard Parkway San Jose, CA 95131 Tel 1 408 441-0311 Fax 1 408 487-2600

Regional Headquarters

Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500

Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369

Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581

Atmel Operations

Memory 2325 Orchard Parkway San Jose, CA 95131 Tel 1 408 441-0311 Fax 1 408 436-4314

Microcontrollers 2325 Orchard Parkway San Jose, CA 95131 Tel 1 408 441-0311 Fax 1 408 436-4314

La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60

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Datasheet ID: E1466DHO-P8Y 519340