M41T60 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

M41T60

Serial access real-time clock

STMicroelectronics 

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DC and AC parameters

M41T60

Table 8.

Symbol

Crystal electrical characteristics

Parameter (1)(2)

Min

Typ

Max Unit

fO Resonant frequency

-

32.768

kHz

RS

Series resistance

(TA = –40 to 70°C, oscillator startup at 2.0 V)

-

75 (3)(4) kΩ

CL Load capacitance

-

6

pF

1. For the QFN16 package, user-supplied, external crystals are required. The 6 and 7 pF crystals listed in Table 9 below have

been evaluated by ST and have been found to be satisfactory for use with the M41T6x series RTCs.

2. Load capacitors are integrated within the M41T60. Circuit board layout considerations for the 32.768 kHz crystal of

minimum trace lengths and isolation from RF generating signals should be taken into account.

3. Guaranteed by design.

4. RS (max) = 65 kΩ for TA = –40 to 85 °C and oscillator startup at 1.5 V.

Table 9.

Crystals suitable for use with M41T6x series RTCs

Manufacturer’s specifications

Vendor

Order number

Package

ESR

max

Temp.

range

(°C)

Rated Rated

tolerance load

at 25 °C cap.

Citizen CMJ206T-32.768KDZB-UB

8.3 x 2.5 mm

leaded SMT

50 kΩ –40/+85

Citizen CM315-32.768KDZY-UB

3.2 x 1.5 x 0.9 mm SMT 70 kΩ –40/+85

Ecliptek E4WCDA06-32.768K

2.0 x 6.0 mm thru-hole 50 kΩ –10/+60

Ecliptek E5WSDC 07 - 32.768K

7 x 1.5 x 1.4 mm SMT 65 kΩ –40/+85

ECS

ECS-.327-6-17X-TR

3.8 x 8.5 x 2.5 mm SMT 50 kΩ –10/+60

ECS

ECS-.327-7-34B-TR

3.2 x 1.5 x 0.9 mm SMT 70 kΩ –40/+85

ECS

Epson

ECS-.327-7-38-TR

MC-146 32.7680KA-AG: ROHS(1)

7 x 1.5 x 1.4 mm SMT 65 kΩ –40/+85

7 x 1.5 x 1.4 mm SMT 65 kΩ –40/+85

Fox

298LF-0.032768-19

1.5 x 5.0 mm thru-hole 50 kΩ –20/+60

Fox

299LF-0.032768-37

2.0 x 6.0 mm thru-hole 50 kΩ –20/+60

Fox

414LF-0.032768-12

3.8 x 8.5 x 2.5 mm SMT 50 kΩ –40/+85

Fox

501LF-0.032768-5

7 x 1.5 x 1.4 mm SMT 65 kΩ –40/+85

Micro

Crystal

MS3V-T1R 32.768KHZ 7PF 20PPM

6.7 x 1.4 mm

leaded SMT

65 kΩ –40/+85

Pletronics SM20S - 32.768K - 6pF

3.8 x 8.5 x 2.5 mm SMT 50 kΩ –40/+85

Seiko

SSPT7F-7PF20PPM

7 x 1.5 x 1.4 mm SMT 65 kΩ –40/+85

Seiko

VT200F-6PF20PPM

2.0 x 6.0 mm thru-hole 50 kΩ –10/+60

1. Epson MC-146 32.7680KA-E: ROHS is 6 pF version.

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

±20 ppm

6 pF

7 pF

6 pF

7 pF

6 pF

7 pF

7 pF

7 pF

6 pF

6 pF

6 pF

7 pF

7 pF

6 pF

7 pF

6 pF

20/27

Doc ID 10396 Rev 13

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