A3977SEDTR-T Allegro Microsystems Inc, A3977SEDTR-T Datasheet - Page 16

• Manufacturer Part Number: A3977SEDTR-T
• Description: LEAD FREE A3977SEDTR
• Manufacturer: Allegro Microsystems Inc

Specifications of A3977SEDTR-T

• Rohs Compliant: YES
• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±2.5A
• Voltage - Load: 8 V ~ 35 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Motor Type: Stepper
• No. Of Outputs: 2
• Output Current: 2.5A
• Output Voltage: 35V
• Supply Voltage Range: 3V To 5.5V
• Driver Case Style: LCC
• No. Of Pins: 44
• Operating Temperature Range: -20°C To +85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1146-2; A3977SEDTR-T

A3977
Terminal
Name
GND
SENSE
HOME
DIR
OUT
NC
PFD
RC
GND
AGND
REF
RC
LOGIC SUPPLY
NC
OUT
MS
MS
SENSE
GND
LOAD SUPPLY
SR
RESET
OUT
NC
STEP
V
PGND
GND
V
CP
CP
NC
OUT
ENABLE
SLEEP
LOAD SUPPLY
* AGND and PGND on the TSSOP package must be connected together externally.
REG
CP
1
2
1
2
2
1
1A
2A
2B
1B
1
2
2
1
Terminal Description
Analog and power ground
Sense resistor for bridge 1
Logic output
Logic Input
DMOS H bridge 1 output A
No (internal) connection
Mixed decay setting
Analog Input for fi xed offtime – bridge 1
Analog and power ground
Analog ground
Gm reference input
Analog input for fi xed offtime – bridge 2
V
No (internal) connection
DMOS H bridge 2 output A
Logic input
Logic input
Sense resistor for bridge 2
Analog and power ground
V
Logic input
Logic input
DMOS H bridge 2 output B
No (internal) connection
Logic input
Regulator decoupling
Power ground
Analog and power ground
Reservoir capacitor
Charge pump capacitor
Charge pump capacitor
No (internal) connection
DMOS H bridge 1 output B
Logic input
Logic input
V
DD
BB2
BB1
, the logic supply voltage
, the load supply for bridge 2
, the load supply for bridge 1
Microstepping DMOS Driver with Translator
Terminal List
(TSSOP)
21*
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
LP
10
12
13
14
15
16
17
18
19
20
22
23
24
25
26
27
28
7*
11
–
1
2
3
4
–
5
6
–
8
9
–
–
–
–
–
22, 23, 24
33, 34, 35
11, 12, 13
(PLCC)
44, 1, 2
29, 30
7, 8
ED
10
14
15
16
17
18
19
20
21
25
26
27
28
31
32
36
37
38
39
40
41
42
43
3
4
5
6
9
–
–
16